Vulnerability-Lookup

GHSA-7MJV-X3JF-545X

Vulnerability from github – Published: 2023-03-21 22:32 – Updated: 2023-03-21 22:32

Summary

cloudflared's Installer has Local Privilege Escalation Vulnerability

Details

Impact

An attacker with local access to the device (without Administrator rights) can use symbolic links to trick the MSI installer into deleting files in locations that the attacker would otherwise have no access to. By creating a symlink from the world-writable directory to the target file, the attacker can manipulate the MSI installer's repair functionality to delete the target file during the repair process.

Exploitation of this vulnerability could allow an attacker to delete important system files or replace them with malicious files, potentially leading to the affected device being compromised.

The cloudflared client itself is not affected by this vulnerability, only the installer for 32-bit Windows devices.

Patches

A new installer was released as part of version 2023.3.1, corresponding to pseudoversion 0.0.0-20230313153246-f686da832f85 on pkg.go.dev. Users are encouraged to remove old installers from their systems.

References

Cloudflared Releases

Severity ?

7.5 (High)


                  
                    CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/cloudflare/cloudflared"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.0.0-20230313153246-f686da832f85"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-1314"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-03-21T22:32:50Z",
    "nvd_published_at": "2023-03-21T12:15:00Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n\nA vulnerability has been discovered in cloudflared\u0027s installer (\u003c= 2023.3.0) for Windows 32-bits devices that allows a local attacker with no administrative permissions to escalate their privileges on the affected device. This vulnerability exists because the MSI installer used by cloudflared relied on a world-writable directory.\n\nAn attacker with local access to the device (without Administrator rights) can use symbolic links to trick the MSI installer into deleting files in locations that the attacker would otherwise have no access to. By creating a symlink from the world-writable directory to the target file, the attacker can manipulate the MSI installer\u0027s repair functionality to delete the target file during the repair process.\n\nExploitation of this vulnerability could allow an attacker to delete important system files or replace them with malicious files, potentially leading to the affected device being compromised.\n\n**The cloudflared client itself is not affected by this vulnerability, only the installer for 32-bit Windows devices.**\n\n### Patches\nA new installer was released as part of version 2023.3.1, corresponding to pseudoversion 0.0.0-20230313153246-f686da832f85 on pkg.go.dev. Users are encouraged to remove old installers from their systems.\n\n### References\n[Cloudflared Releases](https://github.com/cloudflare/cloudflared/releases)",
  "id": "GHSA-7mjv-x3jf-545x",
  "modified": "2023-03-21T22:32:50Z",
  "published": "2023-03-21T22:32:50Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/cloudflare/cloudflared/security/advisories/GHSA-7mjv-x3jf-545x"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-1314"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cloudflare/cloudflared/commit/9c15f31d003bebfbe6467c2b42972df3e7c9b886"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/cloudflare/cloudflared"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cloudflare/cloudflared/releases"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "cloudflared\u0027s Installer has Local Privilege Escalation Vulnerability"
}

CVE-2023-1314 (GCVE-0-2023-1314)

Vulnerability from cvelistv5 – Published: 2023-03-21 11:01 – Updated: 2025-02-26 16:53

Title

Local Privilege Escalation Vulnerability in cloudflared's Installer

Summary

A vulnerability has been discovered in cloudflared's installer (<= 2023.3.0) for Windows 32-bits devices that allows a local attacker with no administrative permissions to escalate their privileges on the affected device. This vulnerability exists because the MSI installer used by cloudflared relied on a world-writable directory. An attacker with local access to the device (without Administrator rights) can use symbolic links to trick the MSI installer into deleting files in locations that the attacker would otherwise have no access to. By creating a symlink from the world-writable directory to the target file, the attacker can manipulate the MSI installer's repair functionality to delete the target file during the repair process. Exploitation of this vulnerability could allow an attacker to delete important system files or replace them with malicious files, potentially leading to the affected device being compromised. The cloudflared client itself is not affected by this vulnerability, only the installer for 32-bit Windows devices.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H

CWE

CWE-59 - Improper Link Resolution Before File Access ('Link Following')

Assigner

cloudflare

References

URL

Tags

	https://github.com/cloudflare/cloudflared/securit…
	https://github.com/cloudflare/cloudflared/releases

Impacted products

	Vendor	Product	Version
	Cloudflare	cloudflared	Affected: 0 , ≤ <=2023.3.0 (custom)

Credits

sim0nsecurity

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T05:40:59.862Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/cloudflare/cloudflared/security/advisories/GHSA-7mjv-x3jf-545x"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/cloudflare/cloudflared/releases"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2023-1314",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-02-26T16:53:22.538031Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-02-26T16:53:31.567Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "modules": [
            "MSI Installer"
          ],
          "packageName": "cloudflared",
          "platforms": [
            "Windows",
            "32 bit"
          ],
          "product": "cloudflared",
          "repo": "https://github.com/cloudflare/cloudflared",
          "vendor": "Cloudflare",
          "versions": [
            {
              "changes": [
                {
                  "at": "2023.3.1",
                  "status": "unaffected"
                }
              ],
              "lessThanOrEqual": "\u003c=2023.3.0",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "user": "00000000-0000-4000-9000-000000000000",
          "value": "sim0nsecurity"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eA vulnerability has been discovered in cloudflared\u0027s installer (\u0026lt;= 2023.3.0) for Windows 32-bits devices that allows a local attacker with no administrative permissions to escalate their privileges on the affected device. This vulnerability exists because the MSI installer used by cloudflared relied on a world-writable directory.\u003c/p\u003e\u003cp\u003eAn attacker with local access to the device (without Administrator rights) can use symbolic links to trick the MSI installer into deleting files in locations that the attacker would otherwise have no access to. By creating a symlink from the world-writable directory to the target file, the attacker can manipulate the MSI installer\u0027s repair functionality to delete the target file during the repair process.\u003c/p\u003e\u003cp\u003eExploitation of this vulnerability could allow an attacker to delete important system files or replace them with malicious files, potentially leading to the affected device being compromised.\u003c/p\u003e\u003cp\u003e\u003cstrong\u003eThe cloudflared client itself is not affected by this vulnerability, only the installer for 32-bit Windows devices.\u003c/strong\u003e\u003c/p\u003e"
            }
          ],
          "value": "A vulnerability has been discovered in cloudflared\u0027s installer (\u003c= 2023.3.0) for Windows 32-bits devices that allows a local attacker with no administrative permissions to escalate their privileges on the affected device. This vulnerability exists because the MSI installer used by cloudflared relied on a world-writable directory.\n\nAn attacker with local access to the device (without Administrator rights) can use symbolic links to trick the MSI installer into deleting files in locations that the attacker would otherwise have no access to. By creating a symlink from the world-writable directory to the target file, the attacker can manipulate the MSI installer\u0027s repair functionality to delete the target file during the repair process.\n\nExploitation of this vulnerability could allow an attacker to delete important system files or replace them with malicious files, potentially leading to the affected device being compromised.\n\nThe cloudflared client itself is not affected by this vulnerability, only the installer for 32-bit Windows devices.\n\n"
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-132",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-132 Symlink Attack"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-59",
              "description": "CWE-59 Improper Link Resolution Before File Access (\u0027Link Following\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-03-21T11:01:14.062Z",
        "orgId": "a22f1246-ba21-4bb4-a601-ad51614c1513",
        "shortName": "cloudflare"
      },
      "references": [
        {
          "url": "https://github.com/cloudflare/cloudflared/security/advisories/GHSA-7mjv-x3jf-545x"
        },
        {
          "url": "https://github.com/cloudflare/cloudflared/releases"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eA new installer was released as part of version 2023.3.1. Users are encouraged to remove old installers from their systems.\u003c/p\u003e"
            }
          ],
          "value": "A new installer was released as part of version 2023.3.1. Users are encouraged to remove old installers from their systems.\n\n"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Local Privilege Escalation Vulnerability in cloudflared\u0027s Installer",
      "x_generator": {
        "engine": "Vulnogram 0.1.0-dev"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a22f1246-ba21-4bb4-a601-ad51614c1513",
    "assignerShortName": "cloudflare",
    "cveId": "CVE-2023-1314",
    "datePublished": "2023-03-21T11:01:14.062Z",
    "dateReserved": "2023-03-10T11:10:40.020Z",
    "dateUpdated": "2025-02-26T16:53:31.567Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-7MJV-X3JF-545X

Impact

Patches

References

CVE-2023-1314 (GCVE-0-2023-1314)

Tags

Sightings

Nomenclature