Common Weakness Enumeration

CWE-59

Allowed

Improper Link Resolution Before File Access ('Link Following')

Abstraction: Base · Status: Draft

API response cwe.mitre.org

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

2457 vulnerabilities reference this CWE, most recent first.

GHSA-2GV2-H7Q5-C548

Vulnerability from github – Published: 2022-05-17 02:18 – Updated: 2022-05-17 02:18
VLAI
Details

bluetooth.rc in p3nfs 5.19 allows local users to overwrite arbitrary files via a symlink attack on the /tmp/blue.log temporary file.

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{
  "affected": [],
  "aliases": [
    "CVE-2008-5154"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2008-11-18T16:00:00Z",
    "severity": "MODERATE"
  },
  "details": "bluetooth.rc in p3nfs 5.19 allows local users to overwrite arbitrary files via a symlink attack on the /tmp/blue.log temporary file.",
  "id": "GHSA-2gv2-h7q5-c548",
  "modified": "2022-05-17T02:18:02Z",
  "published": "2022-05-17T02:18:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2008-5154"
    },
    {
      "type": "WEB",
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/46707"
    },
    {
      "type": "WEB",
      "url": "http://lists.debian.org/debian-devel/2008/08/msg00347.html"
    },
    {
      "type": "WEB",
      "url": "http://secunia.com/advisories/32818"
    },
    {
      "type": "WEB",
      "url": "http://uvw.ru/report.sid.txt"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/32373"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-2GVW-95CM-FFM9

Vulnerability from github – Published: 2022-05-17 03:30 – Updated: 2022-05-17 03:30
VLAI
Details

provider/server/ECServer.cpp in Zarafa Collaboration Platform (ZCP) before 7.1.13 and 7.2.x before 7.2.1 allows local users to write to arbitrary files via a symlink attack on /tmp/zarafa-upgrade-lock.

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{
  "affected": [],
  "aliases": [
    "CVE-2015-3436"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2015-06-09T14:59:00Z",
    "severity": "MODERATE"
  },
  "details": "provider/server/ECServer.cpp in Zarafa Collaboration Platform (ZCP) before 7.1.13 and 7.2.x before 7.2.1 allows local users to write to arbitrary files via a symlink attack on /tmp/zarafa-upgrade-lock.",
  "id": "GHSA-2gvw-95cm-ffm9",
  "modified": "2022-05-17T03:30:00Z",
  "published": "2022-05-17T03:30:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2015-3436"
    },
    {
      "type": "WEB",
      "url": "https://jira.zarafa.com/browse/ZCP-13282"
    },
    {
      "type": "WEB",
      "url": "http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159455.html"
    },
    {
      "type": "WEB",
      "url": "http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159497.html"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/75104"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-2H3H-Q99F-3FHC

Vulnerability from github – Published: 2021-08-31 16:04 – Updated: 2022-08-15 20:08
VLAI
Summary
@npmcli/arborist vulnerable to UNIX Symbolic Link (Symlink) Following
Details

Impact

Arbitrary File Creation, Arbitrary File Overwrite, Arbitrary Code Execution

@npmcli/arborist, the library that calculates dependency trees and manages the node_modules folder hierarchy for the npm command line interface, aims to guarantee that package dependency contracts will be met, and the extraction of package contents will always be performed into the expected folder.

This is, in part, accomplished by resolving dependency specifiers defined in package.json manifests for dependencies with a specific name, and nesting folders to resolve conflicting dependencies.

When multiple dependencies differ only in the case of their name, Arborist's internal data structure saw them as separate items that could coexist within the same level in the node_modules hierarchy. However, on case-insensitive file systems (such as macOS and Windows), this is not the case. Combined with a symlink dependency such as file:/some/path, this allowed an attacker to create a situation in which arbitrary contents could be written to any location on the filesystem.

For example, a package pwn-a could define a dependency in their package.json file such as "foo": "file:/some/path". Another package, pwn-b could define a dependency such as FOO: "file:foo.tgz". On case-insensitive file systems, if pwn-a was installed, and then pwn-b was installed afterwards, the contents of foo.tgz would be written to /some/path, and any existing contents of /some/path would be removed.

Anyone using npm v7.20.6 or earlier on a case-insensitive filesystem is potentially affected.

Patches

2.8.2 (included in npm v7.20.7 and above)

Fix and Caveats

There are two parts to the fix:

  1. Immediately prior to extraction, if the target folder is not a directory, it is moved aside. (If the installation fails, filesystem entries moved aside in this manner are moved back as part of the rollback process.)
  2. The children map that represents child nodes in the tree is replaced with a case-insensitive map object, such that node.children.get('foo') and node.children.get('FOO') will return the same object, enabling Arborist to detect and handle this class of tree collision.

This second item imposes a caveat on case sensitive filesystems where two packages with names which differ only in case may already exist at the same level in the tree, causing unpredictable behavior in this rare edge case. Note that in such cases, the package-lock.json already creates a situation which is hazardous to use on case-sensitive filesystems, and will likely lead to other problems.

If affected by this caveat, please run npm update to rebuild your tree and generate a new package-lock.json file.

Severity
8.2 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@npmcli/arborist"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.8.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-39134"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-178",
      "CWE-59",
      "CWE-61"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-08-31T16:02:46Z",
    "nvd_published_at": "2021-08-31T17:15:00Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n\nArbitrary File Creation, Arbitrary File Overwrite, Arbitrary Code Execution\n\n`@npmcli/arborist`, the library that calculates dependency trees and manages the `node_modules` folder hierarchy for the npm command line interface, aims to guarantee that package dependency contracts will be met, and the extraction of package contents will always be performed into the expected folder.\n\nThis is, in part, accomplished by resolving dependency specifiers defined in `package.json` manifests for dependencies with a specific name, and nesting folders to resolve conflicting dependencies.\n\nWhen multiple dependencies differ only in the case of their name, Arborist\u0027s internal data structure saw them as separate items that could coexist within the same level in the `node_modules` hierarchy.  However, on case-insensitive file systems (such as macOS and Windows), this is not the case.  Combined with a symlink dependency such as `file:/some/path`, this allowed an attacker to create a situation in which arbitrary contents could be written to any location on the filesystem.\n\nFor example, a package `pwn-a` could define a dependency in their `package.json` file such as `\"foo\": \"file:/some/path\"`.  Another package, `pwn-b` could define a dependency such as `FOO: \"file:foo.tgz\"`.  On case-insensitive file systems, if `pwn-a` was installed, and then `pwn-b` was installed afterwards, the contents of `foo.tgz` would be written to `/some/path`, and any existing contents of `/some/path` would be removed.\n\nAnyone using npm v7.20.6 or earlier on a case-insensitive filesystem is potentially affected.\n\n### Patches\n\n2.8.2 (included in npm v7.20.7 and above)\n\n### Fix and Caveats\n\nThere are two parts to the fix:\n\n1. Immediately prior to extraction, if the target folder is not a directory, it is moved aside.  (If the installation fails, filesystem entries moved aside in this manner are moved back as part of the rollback process.)\n2. The `children` map that represents child nodes in the tree is replaced with a case-insensitive map object, such that `node.children.get(\u0027foo\u0027)` and `node.children.get(\u0027FOO\u0027)` will return the same object, enabling Arborist to detect and handle this class of tree collision.\n\nThis second item imposes a caveat on case _sensitive_ filesystems where two packages with names which differ only in case may already exist at the same level in the tree, causing unpredictable behavior in this rare edge case.  Note that in such cases, the `package-lock.json` already creates a situation which is hazardous to use on case-sensitive filesystems, and will likely lead to other problems.\n\nIf affected by this caveat, please run `npm update` to rebuild your tree and generate a new `package-lock.json` file.",
  "id": "GHSA-2h3h-q99f-3fhc",
  "modified": "2022-08-15T20:08:31Z",
  "published": "2021-08-31T16:04:03Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/npm/arborist/security/advisories/GHSA-2h3h-q99f-3fhc"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-39134"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/npm/arborist"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/package/@npmcli/arborist"
    },
    {
      "type": "WEB",
      "url": "https://www.oracle.com/security-alerts/cpuoct2021.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "@npmcli/arborist vulnerable to UNIX Symbolic Link (Symlink) Following"
}

GHSA-2HPJ-V4F4-7G4J

Vulnerability from github – Published: 2022-05-24 16:47 – Updated: 2024-12-06 15:31
VLAI
Details

dbus before 1.10.28, 1.12.x before 1.12.16, and 1.13.x before 1.13.12, as used in DBusServer in Canonical Upstart in Ubuntu 14.04 (and in some, less common, uses of dbus-daemon), allows cookie spoofing because of symlink mishandling in the reference implementation of DBUS_COOKIE_SHA1 in the libdbus library. (This only affects the DBUS_COOKIE_SHA1 authentication mechanism.) A malicious client with write access to its own home directory could manipulate a ~/.dbus-keyrings symlink to cause a DBusServer with a different uid to read and write in unintended locations. In the worst case, this could result in the DBusServer reusing a cookie that is known to the malicious client, and treating that cookie as evidence that a subsequent client connection came from an attacker-chosen uid, allowing authentication bypass.

Severity
7.1 (High)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
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{
  "affected": [],
  "aliases": [
    "CVE-2019-12749"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-06-11T17:29:00Z",
    "severity": "HIGH"
  },
  "details": "dbus before 1.10.28, 1.12.x before 1.12.16, and 1.13.x before 1.13.12, as used in DBusServer in Canonical Upstart in Ubuntu 14.04 (and in some, less common, uses of dbus-daemon), allows cookie spoofing because of symlink mishandling in the reference implementation of DBUS_COOKIE_SHA1 in the libdbus library. (This only affects the DBUS_COOKIE_SHA1 authentication mechanism.) A malicious client with write access to its own home directory could manipulate a ~/.dbus-keyrings symlink to cause a DBusServer with a different uid to read and write in unintended locations. In the worst case, this could result in the DBusServer reusing a cookie that is known to the malicious client, and treating that cookie as evidence that a subsequent client connection came from an attacker-chosen uid, allowing authentication bypass.",
  "id": "GHSA-2hpj-v4f4-7g4j",
  "modified": "2024-12-06T15:31:17Z",
  "published": "2022-05-24T16:47:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-12749"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:1726"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:2868"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:2870"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:3707"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2019/06/msg00005.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V2CQF37O73VH2JDVX2ILX2KD2KLXLQOU"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/V2CQF37O73VH2JDVX2ILX2KD2KLXLQOU"
    },
    {
      "type": "WEB",
      "url": "https://seclists.org/bugtraq/2019/Jun/16"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/201909-08"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20241206-0010"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/4015-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/4015-2"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2019/dsa-4462"
    },
    {
      "type": "WEB",
      "url": "https://www.openwall.com/lists/oss-security/2019/06/11/2"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00059.html"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00092.html"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00026.html"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2019/06/11/2"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/108751"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-2J7J-MG3J-2MR8

Vulnerability from github – Published: 2022-05-01 18:33 – Updated: 2022-05-01 18:33
VLAI
Details

sealert in setroubleshoot 2.0.5 allows local users to overwrite arbitrary files via a symlink attack on the sealert.log temporary file.

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{
  "affected": [],
  "aliases": [
    "CVE-2007-5495"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2008-05-23T15:32:00Z",
    "severity": "MODERATE"
  },
  "details": "sealert in setroubleshoot 2.0.5 allows local users to overwrite arbitrary files via a symlink attack on the sealert.log temporary file.",
  "id": "GHSA-2j7j-mg3j-2mr8",
  "modified": "2022-05-01T18:33:59Z",
  "published": "2022-05-01T18:33:59Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2007-5495"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=288221"
    },
    {
      "type": "WEB",
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/42591"
    },
    {
      "type": "WEB",
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9705"
    },
    {
      "type": "WEB",
      "url": "http://secunia.com/advisories/30339"
    },
    {
      "type": "WEB",
      "url": "http://securitytracker.com/id?1020077"
    },
    {
      "type": "WEB",
      "url": "http://www.redhat.com/support/errata/RHSA-2008-0061.html"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/29320"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-2J93-M82W-73J2

Vulnerability from github – Published: 2026-10-13 20:44 – Updated: 2026-10-13 20:44
VLAI
Summary
Microsoft Security Advisory CVE-2026-96231 - .NET and Visual Studio Elevation of Privilege Vulnerability
Details

Executive summary

Microsoft is releasing this security advisory to provide information about a vulnerability in Microsoft.NETCore.App.Runtime; System.Private.CoreLib. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

Unix named-mutex and shared-memory paths can be manipulated through insecure global directories, symlink races, and unsafe permission changes, allowing local attackers to truncate or overwrite files, widen directory permissions, or elevate privileges.

Announcement

Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/479

CVSS Details

  • Version: 3.1
  • Severity: High
  • Score: 7.8
  • Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • Weakness: CWE-59 (Improper Link Resolution Before File Access ('Link Following'))

Affected Platforms

  • Platforms: Linux, macOS
  • Architectures: All

Affected Packages

The vulnerability affects Microsoft .NET projects that use an affected package version listed below.

Package name Affected version Patched version
Microsoft.NETCore.App.Runtime.linux-arm >= 8.0.0, <= 8.0.31 8.0.32
Microsoft.NETCore.App.Runtime.linux-arm64 >= 8.0.0, <= 8.0.31 8.0.32
Microsoft.NETCore.App.Runtime.linux-musl-arm >= 8.0.0, <= 8.0.31 8.0.32
Microsoft.NETCore.App.Runtime.linux-musl-arm64 >= 8.0.0, <= 8.0.31 8.0.32
Microsoft.NETCore.App.Runtime.linux-musl-x64 >= 8.0.0, <= 8.0.31 8.0.32
Microsoft.NETCore.App.Runtime.linux-x64 >= 8.0.0, <= 8.0.31 8.0.32
Microsoft.NETCore.App.Runtime.osx-arm64 >= 8.0.0, <= 8.0.31 8.0.32
Microsoft.NETCore.App.Runtime.osx-x64 >= 8.0.0, <= 8.0.31 8.0.32
Microsoft.NETCore.App.Runtime.linux-arm >= 10.0.0, <= 10.0.12 10.0.13
Microsoft.NETCore.App.Runtime.linux-arm64 >= 10.0.0, <= 10.0.12 10.0.13
Microsoft.NETCore.App.Runtime.linux-musl-arm >= 10.0.0, <= 10.0.12 10.0.13
Microsoft.NETCore.App.Runtime.linux-musl-arm64 >= 10.0.0, <= 10.0.12 10.0.13
Microsoft.NETCore.App.Runtime.linux-musl-x64 >= 10.0.0, <= 10.0.12 10.0.13
Microsoft.NETCore.App.Runtime.linux-x64 >= 10.0.0, <= 10.0.12 10.0.13
Microsoft.NETCore.App.Runtime.osx-arm64 >= 10.0.0, <= 10.0.12 10.0.13
Microsoft.NETCore.App.Runtime.osx-x64 >= 10.0.0, <= 10.0.12 10.0.13
Microsoft.NETCore.App.Runtime.linux-arm >= 9.0.0, <= 9.0.20 9.0.21
Microsoft.NETCore.App.Runtime.linux-arm64 >= 9.0.0, <= 9.0.20 9.0.21
Microsoft.NETCore.App.Runtime.linux-musl-arm >= 9.0.0, <= 9.0.20 9.0.21
Microsoft.NETCore.App.Runtime.linux-musl-arm64 >= 9.0.0, <= 9.0.20 9.0.21
Microsoft.NETCore.App.Runtime.linux-musl-x64 >= 9.0.0, <= 9.0.20 9.0.21
Microsoft.NETCore.App.Runtime.linux-x64 >= 9.0.0, <= 9.0.20 9.0.21
Microsoft.NETCore.App.Runtime.osx-arm64 >= 9.0.0, <= 9.0.20 9.0.21
Microsoft.NETCore.App.Runtime.osx-x64 >= 9.0.0, <= 9.0.20 9.0.21
Microsoft.NETCore.App.Runtime.linux-arm >= 11.0.0-preview.1, <= 11.0.0-rc.1 11.0.0-rc.2
Microsoft.NETCore.App.Runtime.linux-arm64 >= 11.0.0-preview.1, <= 11.0.0-rc.1 11.0.0-rc.2
Microsoft.NETCore.App.Runtime.linux-musl-arm >= 11.0.0-preview.1, <= 11.0.0-rc.1 11.0.0-rc.2
Microsoft.NETCore.App.Runtime.linux-musl-arm64 >= 11.0.0-preview.1, <= 11.0.0-rc.1 11.0.0-rc.2
Microsoft.NETCore.App.Runtime.linux-musl-x64 >= 11.0.0-preview.1, <= 11.0.0-rc.1 11.0.0-rc.2
Microsoft.NETCore.App.Runtime.linux-x64 >= 11.0.0-preview.1, <= 11.0.0-rc.1 11.0.0-rc.2
Microsoft.NETCore.App.Runtime.osx-arm64 >= 11.0.0-preview.1, <= 11.0.0-rc.1 11.0.0-rc.2
Microsoft.NETCore.App.Runtime.osx-x64 >= 11.0.0-preview.1, <= 11.0.0-rc.1 11.0.0-rc.2

Advisory FAQ

How do I know if I am affected?

If using a package listed in affected packages, you're exposed to the vulnerability.

How do I fix the issue?

  1. To fix the issue please install the latest version of .NET. If you have installed one or more .NET SDKs through Visual Studio, Visual Studio will prompt you to update Visual Studio, which will also update your .NET SDKs.
  2. If your application references the vulnerable package, update the package reference to the patched version. You can list the versions you have installed by running the dotnet --info command.

Once you have installed the updated runtime or SDK, restart your apps for the update to take effect.

Additionally, if you've deployed self-contained applications targeting any of the impacted versions, these applications are also vulnerable and must be recompiled and redeployed.

Other Information

Reporting Security Issues

If you have found a potential security issue in a supported version of .NET, please report it to the Microsoft Security Response Center (MSRC) via the MSRC Researcher Portal. Further information can be found in the MSRC Report an Issue FAQ.

Security reports made through MSRC may qualify for the Microsoft .NET Bounty. Details of the Microsoft .NET Bounty Program including terms and conditions are at https://aka.ms/corebounty.

Support

You can ask questions about this issue on GitHub in the .NET GitHub organization. The main repos are located at https://github.com/dotnet/runtime. The Announcements repo (https://github.com/dotnet/Announcements) will contain this bulletin as an issue and will include a link to a discussion issue. You can ask questions in the linked discussion issue.

Disclaimer

The information provided in this advisory is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

External Links

CVE-2026-96231

Acknowledgements

  • Nguyễn Văn Minh Đức with Saigon Newport Corporation

Revisions

V1.0 (10/13/2026): Advisory published.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Show details on source website
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{
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  ],
  "aliases": [
    "CVE-2026-96231"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-13T20:44:11Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "## Executive summary\n\nMicrosoft is releasing this security advisory to provide information about a vulnerability in Microsoft.NETCore.App.Runtime; System.Private.CoreLib. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.\n\nUnix named-mutex and shared-memory paths can be manipulated through insecure global directories, symlink races, and unsafe permission changes, allowing local attackers to truncate or overwrite files, widen directory permissions, or elevate privileges.\n\n## Announcement\n\nAnnouncement for this issue can be found at https://github.com/dotnet/announcements/issues/479\n\n## CVSS Details\n\n- **Version:** 3.1\n- **Severity:** High\n- **Score:** 7.8\n- **Vector:** `CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`\n- **Weakness:** CWE-59 (Improper Link Resolution Before File Access (\u0027Link Following\u0027))\n\n## Affected Platforms\n\n- **Platforms:** Linux, macOS\n- **Architectures:** All\n\n## \u003ca name=\"affected-packages\"\u003e\u003c/a\u003eAffected Packages\n\nThe vulnerability affects Microsoft .NET projects that use an affected package version listed below.\n\nPackage name | Affected version | Patched version\n------------ | ---------------- | ---------------\n[Microsoft.NETCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-arm) | \u003e= 8.0.0, \u003c= 8.0.31 | 8.0.32\n[Microsoft.NETCore.App.Runtime.linux-arm64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-arm64) | \u003e= 8.0.0, \u003c= 8.0.31 | 8.0.32\n[Microsoft.NETCore.App.Runtime.linux-musl-arm](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-musl-arm) | \u003e= 8.0.0, \u003c= 8.0.31 | 8.0.32\n[Microsoft.NETCore.App.Runtime.linux-musl-arm64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-musl-arm64) | \u003e= 8.0.0, \u003c= 8.0.31 | 8.0.32\n[Microsoft.NETCore.App.Runtime.linux-musl-x64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-musl-x64) | \u003e= 8.0.0, \u003c= 8.0.31 | 8.0.32\n[Microsoft.NETCore.App.Runtime.linux-x64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-x64) | \u003e= 8.0.0, \u003c= 8.0.31 | 8.0.32\n[Microsoft.NETCore.App.Runtime.osx-arm64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.osx-arm64) | \u003e= 8.0.0, \u003c= 8.0.31 | 8.0.32\n[Microsoft.NETCore.App.Runtime.osx-x64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.osx-x64) | \u003e= 8.0.0, \u003c= 8.0.31 | 8.0.32\n[Microsoft.NETCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-arm) | \u003e= 10.0.0, \u003c= 10.0.12 | 10.0.13\n[Microsoft.NETCore.App.Runtime.linux-arm64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-arm64) | \u003e= 10.0.0, \u003c= 10.0.12 | 10.0.13\n[Microsoft.NETCore.App.Runtime.linux-musl-arm](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-musl-arm) | \u003e= 10.0.0, \u003c= 10.0.12 | 10.0.13\n[Microsoft.NETCore.App.Runtime.linux-musl-arm64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-musl-arm64) | \u003e= 10.0.0, \u003c= 10.0.12 | 10.0.13\n[Microsoft.NETCore.App.Runtime.linux-musl-x64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-musl-x64) | \u003e= 10.0.0, \u003c= 10.0.12 | 10.0.13\n[Microsoft.NETCore.App.Runtime.linux-x64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-x64) | \u003e= 10.0.0, \u003c= 10.0.12 | 10.0.13\n[Microsoft.NETCore.App.Runtime.osx-arm64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.osx-arm64) | \u003e= 10.0.0, \u003c= 10.0.12 | 10.0.13\n[Microsoft.NETCore.App.Runtime.osx-x64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.osx-x64) | \u003e= 10.0.0, \u003c= 10.0.12 | 10.0.13\n[Microsoft.NETCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-arm) | \u003e= 9.0.0, \u003c= 9.0.20 | 9.0.21\n[Microsoft.NETCore.App.Runtime.linux-arm64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-arm64) | \u003e= 9.0.0, \u003c= 9.0.20 | 9.0.21\n[Microsoft.NETCore.App.Runtime.linux-musl-arm](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-musl-arm) | \u003e= 9.0.0, \u003c= 9.0.20 | 9.0.21\n[Microsoft.NETCore.App.Runtime.linux-musl-arm64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-musl-arm64) | \u003e= 9.0.0, \u003c= 9.0.20 | 9.0.21\n[Microsoft.NETCore.App.Runtime.linux-musl-x64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-musl-x64) | \u003e= 9.0.0, \u003c= 9.0.20 | 9.0.21\n[Microsoft.NETCore.App.Runtime.linux-x64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-x64) | \u003e= 9.0.0, \u003c= 9.0.20 | 9.0.21\n[Microsoft.NETCore.App.Runtime.osx-arm64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.osx-arm64) | \u003e= 9.0.0, \u003c= 9.0.20 | 9.0.21\n[Microsoft.NETCore.App.Runtime.osx-x64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.osx-x64) | \u003e= 9.0.0, \u003c= 9.0.20 | 9.0.21\n[Microsoft.NETCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-arm) | \u003e= 11.0.0-preview.1, \u003c= 11.0.0-rc.1 | 11.0.0-rc.2\n[Microsoft.NETCore.App.Runtime.linux-arm64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-arm64) | \u003e= 11.0.0-preview.1, \u003c= 11.0.0-rc.1 | 11.0.0-rc.2\n[Microsoft.NETCore.App.Runtime.linux-musl-arm](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-musl-arm) | \u003e= 11.0.0-preview.1, \u003c= 11.0.0-rc.1 | 11.0.0-rc.2\n[Microsoft.NETCore.App.Runtime.linux-musl-arm64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-musl-arm64) | \u003e= 11.0.0-preview.1, \u003c= 11.0.0-rc.1 | 11.0.0-rc.2\n[Microsoft.NETCore.App.Runtime.linux-musl-x64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-musl-x64) | \u003e= 11.0.0-preview.1, \u003c= 11.0.0-rc.1 | 11.0.0-rc.2\n[Microsoft.NETCore.App.Runtime.linux-x64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-x64) | \u003e= 11.0.0-preview.1, \u003c= 11.0.0-rc.1 | 11.0.0-rc.2\n[Microsoft.NETCore.App.Runtime.osx-arm64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.osx-arm64) | \u003e= 11.0.0-preview.1, \u003c= 11.0.0-rc.1 | 11.0.0-rc.2\n[Microsoft.NETCore.App.Runtime.osx-x64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.osx-x64) | \u003e= 11.0.0-preview.1, \u003c= 11.0.0-rc.1 | 11.0.0-rc.2\n\n## Advisory FAQ\n\n### \u003ca name=\"how-affected\"\u003e\u003c/a\u003eHow do I know if I am affected?\n\nIf using a package listed in [affected packages](#affected-packages), you\u0027re exposed to the vulnerability.\n\n### \u003ca name=\"how-fix\"\u003e\u003c/a\u003eHow do I fix the issue?\n\n1. To fix the issue please install the latest version of .NET. If you have installed one or more .NET SDKs through Visual Studio, Visual Studio will prompt you to update Visual Studio, which will also update your .NET SDKs.\n2. If your application references the vulnerable package, update the package reference to the patched version. You can list the versions you have installed by running the `dotnet --info` command.\n\nOnce you have installed the updated runtime or SDK, restart your apps for the update to take effect.\n\nAdditionally, if you\u0027ve deployed [self-contained applications](https://docs.microsoft.com/dotnet/core/deploying/#self-contained-deployments-scd) targeting any of the impacted versions, these applications are also vulnerable and must be recompiled and redeployed.\n\n## Other Information\n\n### Reporting Security Issues\n\nIf you have found a potential security issue in a supported version of .NET, please report it to the Microsoft Security Response Center (MSRC) via the [MSRC Researcher Portal](https://msrc.microsoft.com/report/vulnerability/new). Further information can be found in the MSRC [Report an Issue FAQ](https://www.microsoft.com/msrc/faqs-report-an-issue).\n\nSecurity reports made through MSRC may qualify for the Microsoft .NET Bounty. Details of the Microsoft .NET Bounty Program including terms and conditions are at https://aka.ms/corebounty.\n\n### Support\n\nYou can ask questions about this issue on GitHub in the .NET GitHub organization. The main repos are located at https://github.com/dotnet/runtime. The Announcements repo (https://github.com/dotnet/Announcements) will contain this bulletin as an issue and will include a link to a discussion issue. You can ask questions in the linked discussion issue.\n\n### Disclaimer\n\nThe information provided in this advisory is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.\n\n### External Links\n\n[CVE-2026-96231](https://www.cve.org/CVERecord?id=CVE-2026-96231)\n\n### Acknowledgements\n\n- Nguy\u1ec5n V\u0103n Minh \u0110\u1ee9c with Saigon Newport Corporation\n\n### Revisions\n\nV1.0 (10/13/2026): Advisory published.",
  "id": "GHSA-2j93-m82w-73j2",
  "modified": "2026-10-13T20:44:11Z",
  "published": "2026-10-13T20:44:11Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/dotnet/runtime/security/advisories/GHSA-2j93-m82w-73j2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/dotnet/announcements/issues/479"
    },
    {
      "type": "WEB",
      "url": "https://github.com/dotnet/runtime/issues/135707"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/dotnet/runtime"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Microsoft Security Advisory CVE-2026-96231 - .NET and Visual Studio Elevation of Privilege Vulnerability"
}

GHSA-2JC2-R9GV-GX5X

Vulnerability from github – Published: 2026-06-11 21:31 – Updated: 2026-06-11 21:31
VLAI
Details

This issue was addressed with improved handling of symlinks. This issue is fixed in macOS Sequoia 15.4. An app may be able to access protected user data.

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2025-46293"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-11T19:16:34Z",
    "severity": "MODERATE"
  },
  "details": "This issue was addressed with improved handling of symlinks. This issue is fixed in macOS Sequoia 15.4. An app may be able to access protected user data.",
  "id": "GHSA-2jc2-r9gv-gx5x",
  "modified": "2026-06-11T21:31:55Z",
  "published": "2026-06-11T21:31:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-46293"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/en-us/122373"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-2JC3-8RQ8-7X2X

Vulnerability from github – Published: 2022-05-24 16:59 – Updated: 2024-04-04 02:31
VLAI
Details

It was found that rpm did not properly handle RPM installations when a destination path was a symbolic link to a directory, possibly changing ownership and permissions of an arbitrary directory, and RPM files being placed in an arbitrary destination. An attacker, with write access to a directory in which a subdirectory will be installed, could redirect that directory to an arbitrary location and gain root privilege.

Severity
7.8 (High)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2017-7500"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-08-13T17:29:00Z",
    "severity": "HIGH"
  },
  "details": "It was found that rpm did not properly handle RPM installations when a destination path was a symbolic link to a directory, possibly changing ownership and permissions of an arbitrary directory, and RPM files being placed in an arbitrary destination. An attacker, with write access to a directory in which a subdirectory will be installed, could redirect that directory to an arbitrary location and gain root privilege.",
  "id": "GHSA-2jc3-8rq8-7x2x",
  "modified": "2024-04-04T02:31:37Z",
  "published": "2022-05-24T16:59:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-7500"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rpm-software-management/rpm/commit/c815822c8bdb138066ff58c624ae83e3a12ebfa9"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rpm-software-management/rpm/commit/f2d3be2a8741234faaa96f5fd05fdfdc75779a79"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7500"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-2JCP-64Q4-69C4

Vulnerability from github – Published: 2023-10-25 21:30 – Updated: 2023-11-02 18:30
VLAI
Details

This issue was addressed with improved handling of symlinks. This issue is fixed in macOS Sonoma 14.1, macOS Monterey 12.7.1, macOS Ventura 13.6.1. A website may be able to access sensitive user data when resolving symlinks.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2023-42844"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-10-25T19:15:10Z",
    "severity": "HIGH"
  },
  "details": "This issue was addressed with improved handling of symlinks. This issue is fixed in macOS Sonoma 14.1, macOS Monterey 12.7.1, macOS Ventura 13.6.1. A website may be able to access sensitive user data when resolving symlinks.",
  "id": "GHSA-2jcp-64q4-69c4",
  "modified": "2023-11-02T18:30:23Z",
  "published": "2023-10-25T21:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-42844"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/en-us/HT213983"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/en-us/HT213984"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/en-us/HT213985"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/kb/HT213983"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/kb/HT213984"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/kb/HT213985"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2023/Oct/21"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2023/Oct/24"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2023/Oct/26"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-2JCP-PPP2-C9RV

Vulnerability from github – Published: 2022-05-24 16:44 – Updated: 2024-04-04 00:17
VLAI
Details

A local attacker can create a hard-link between a file to which the Check Point Endpoint Security client for Windows before E80.96 writes and another BAT file, then by impersonating the WPAD server, the attacker can write BAT commands into that file that will later be run by the user or the system.

Severity
7.0 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2019-8454"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59",
      "CWE-65"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-04-29T16:29:00Z",
    "severity": "HIGH"
  },
  "details": "A local attacker can create a hard-link between a file to which the Check Point Endpoint Security client for Windows before E80.96 writes and another BAT file, then by impersonating the WPAD server, the attacker can write BAT commands into that file that will later be run by the user or the system.",
  "id": "GHSA-2jcp-ppp2-c9rv",
  "modified": "2024-04-04T00:17:41Z",
  "published": "2022-05-24T16:44:53Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-8454"
    },
    {
      "type": "WEB",
      "url": "https://supportcenter.us.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=\u0026solutionid=sk150012"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}
Mitigation MIT-48.1
Architecture and Design

Strategy: Separation of Privilege

  • Follow the principle of least privilege when assigning access rights to entities in a software system.
  • Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.
CAPEC-132: Symlink Attack

An adversary positions a symbolic link in such a manner that the targeted user or application accesses the link's endpoint, assuming that it is accessing a file with the link's name.

CAPEC-17: Using Malicious Files

An attack of this type exploits a system's configuration that allows an adversary to either directly access an executable file, for example through shell access; or in a possible worst case allows an adversary to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.

CAPEC-35: Leverage Executable Code in Non-Executable Files

An attack of this type exploits a system's trust in configuration and resource files. When the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high.

CAPEC-76: Manipulating Web Input to File System Calls

An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.

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