Common Weakness Enumeration

CWE-295

Allowed

Improper Certificate Validation

Abstraction: Base · Status: Draft

API response cwe.mitre.org

The product does not validate, or incorrectly validates, a certificate.

1906 vulnerabilities reference this CWE, most recent first.

GHSA-VW5V-4F2Q-W9XF

Vulnerability from github – Published: 2026-03-03 20:08 – Updated: 2026-03-25 18:29
VLAI
Summary
AWS-LC has PKCS7_verify Certificate Chain Validation Bypass
Details

Summary

AWS-LC is an open-source, general-purpose cryptographic library.

Impact

Improper certificate validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass certificate chain verification when processing PKCS7 objects with multiple signers, except the final signer.

Customers of AWS services do not need to take action. aws-lc-sys contains code from AWS-LC. Applications using aws-lc-sys should upgrade to the most recent release of aws-lc-sys.

Impacted versions:

aws-lc-sys versions: >= 0.24.0, < 0.38.0

Patches

The patch is included in v0.38.0

Workarounds

There is no workaround. Applications using aws-lc-sys should upgrade to the most recent release of aws-lc-sys.

Resources

If there are any questions or comments about this advisory, contact [AWS/Amazon] Security via the vulnerability reporting page or directly via email to aws-security@amazon.com. Please do not create a public GitHub issue.

Acknowledgement

AWS-LC would like to thank Joshua Rogers (https://joshua.hu/) for collaborating on this issue through the coordinated vulnerability disclosure process.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "aws-lc-sys"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.24.0"
            },
            {
              "fixed": "0.38.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-03T20:08:24Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Summary\nAWS-LC is an open-source, general-purpose cryptographic library.\n\n### Impact\nImproper certificate validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass certificate chain verification when processing PKCS7 objects with multiple signers, except the final signer.\n\nCustomers of AWS services do not need to take action. aws-lc-sys contains code from AWS-LC. Applications using aws-lc-sys should upgrade to the most recent release of aws-lc-sys.\n\n#### Impacted versions: \naws-lc-sys versions: \u003e= 0.24.0, \u003c 0.38.0\n\n### Patches\nThe patch is included in v0.38.0\n\n### Workarounds\nThere is no workaround. Applications using aws-lc-sys should upgrade to the most recent release of aws-lc-sys.\n\n### Resources\nIf there are any questions or comments about this advisory, contact [AWS/Amazon] Security via the [vulnerability reporting page](https://aws.amazon.com/security/vulnerability-reporting) or directly via email to [aws-security@amazon.com](mailto:aws-security@amazon.com). Please do not create a public GitHub issue.\n\n### Acknowledgement\nAWS-LC would like to thank Joshua Rogers (https://joshua.hu/) for collaborating on this issue through the coordinated vulnerability disclosure process.",
  "id": "GHSA-vw5v-4f2q-w9xf",
  "modified": "2026-03-25T18:29:18Z",
  "published": "2026-03-03T20:08:24Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/aws/aws-lc-rs/security/advisories/GHSA-vw5v-4f2q-w9xf"
    },
    {
      "type": "WEB",
      "url": "https://github.com/aws/aws-lc/security/advisories/GHSA-cfwj-9wp5-wqvp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3336"
    },
    {
      "type": "WEB",
      "url": "https://aws.amazon.com/security/security-bulletins/2026-005-AWS"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/aws/aws-lc-rs"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0046.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "AWS-LC has PKCS7_verify Certificate Chain Validation Bypass"
}

GHSA-VW83-PRMH-H2QC

Vulnerability from github – Published: 2026-05-26 18:31 – Updated: 2026-05-26 21:31
VLAI
Details

FastNetMon Community Edition through 1.2.9 does not verify TLS certificates on outbound HTTPS connections. The execute_web_request_secure() function in src/fast_library.cpp creates a boost::asio::ssl::context with tls_client mode and calls set_default_verify_paths() to load CA certificates, but never calls set_verify_mode(boost::asio::ssl::verify_peer). Without this call, OpenSSL performs the TLS handshake without validating the server's certificate chain, making all HTTPS connections vulnerable to man-in-the-middle attacks. This function is used for telemetry reporting to community-stats.fastnetmon.com, which sends system information including CPU model, kernel version, traffic statistics, and software configuration. An attacker can intercept and modify this data or redirect it to a malicious server.

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

{
  "affected": [],
  "aliases": [
    "CVE-2026-48697"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-26T17:16:53Z",
    "severity": "HIGH"
  },
  "details": "FastNetMon Community Edition through 1.2.9 does not verify TLS certificates on outbound HTTPS connections. The execute_web_request_secure() function in src/fast_library.cpp creates a boost::asio::ssl::context with tls_client mode and calls set_default_verify_paths() to load CA certificates, but never calls set_verify_mode(boost::asio::ssl::verify_peer). Without this call, OpenSSL performs the TLS handshake without validating the server\u0027s certificate chain, making all HTTPS connections vulnerable to man-in-the-middle attacks. This function is used for telemetry reporting to community-stats.fastnetmon.com, which sends system information including CPU model, kernel version, traffic statistics, and software configuration. An attacker can intercept and modify this data or redirect it to a malicious server.",
  "id": "GHSA-vw83-prmh-h2qc",
  "modified": "2026-05-26T21:31:57Z",
  "published": "2026-05-26T18:31:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48697"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pavel-odintsov/fastnetmon"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pavel-odintsov/fastnetmon/blob/master/src/fast_library.cpp"
    },
    {
      "type": "WEB",
      "url": "https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48697-missing-tls-validation"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-VWF6-H3R8-8JFJ

Vulnerability from github – Published: 2026-03-11 09:31 – Updated: 2026-03-13 15:31
VLAI
Details

An improper certificate validation vulnerability has been reported to affect Video Station. If an attacker gains local network access who have also gained an administrator account, they can then exploit the vulnerability to compromise the security of the system.

We have already fixed the vulnerability in the following version: Video Station 5.8.2 and later

Severity
6.7 (Medium)
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
0.1 (Low)
CVSS:4.0/AV:P/AC:L/AT:P/PR:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L/E:U
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2024-14024"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-11T08:16:01Z",
    "severity": "LOW"
  },
  "details": "An improper certificate validation vulnerability has been reported to affect Video Station. If an attacker gains local network access who have also gained an administrator account, they can then exploit the vulnerability to compromise the security of the system.\n\nWe have already fixed the vulnerability in the following version:\nVideo Station 5.8.2 and later",
  "id": "GHSA-vwf6-h3r8-8jfj",
  "modified": "2026-03-13T15:31:33Z",
  "published": "2026-03-11T09:31:54Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-14024"
    },
    {
      "type": "WEB",
      "url": "https://www.qnap.com/en/security-advisory/qsa-24-24"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:P/AC:L/AT:P/PR:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

GHSA-VWMQ-9GJC-2JJJ

Vulnerability from github – Published: 2022-04-21 00:00 – Updated: 2022-05-01 00:00
VLAI
Details

Certificate.Verify in crypto/x509 in Go 1.18.x before 1.18.1 can be caused to panic on macOS when presented with certain malformed certificates. This allows a remote TLS server to cause a TLS client to panic.

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

{
  "affected": [],
  "aliases": [
    "CVE-2022-27536"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-04-20T10:15:00Z",
    "severity": "HIGH"
  },
  "details": "Certificate.Verify in crypto/x509 in Go 1.18.x before 1.18.1 can be caused to panic on macOS when presented with certain malformed certificates. This allows a remote TLS server to cause a TLS client to panic.",
  "id": "GHSA-vwmq-9gjc-2jjj",
  "modified": "2022-05-01T00:00:38Z",
  "published": "2022-04-21T00:00:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-27536"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/g/golang-announce"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/g/golang-announce/c/oecdBNLOml8"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-VWQQ-5VRC-XW9H

Vulnerability from github – Published: 2020-06-05 14:15 – Updated: 2026-06-09 10:30
VLAI
Summary
Improper validation of certificate with host mismatch in Apache Log4j SMTP appender
Details

Improper validation of certificate with host mismatch in Apache Log4j SMTP appender prior to version 2.13.2. This could allow an SMTPS connection to be intercepted by a man-in-the-middle attack which could leak any log messages sent through that appender.

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

{
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        "ecosystem": "Maven",
        "name": "org.apache.logging.log4j:log4j"
      },
      "ranges": [
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    },
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  "id": "GHSA-vwqq-5vrc-xw9h",
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  "published": "2020-06-05T14:15:51Z",
  "references": [
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    },
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      "url": "https://www.oracle.com/security-alerts/cpuoct2020.html"
    },
    {
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      "url": "https://www.oracle.com/security-alerts/cpujul2020.html"
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    {
      "type": "WEB",
      "url": "https://www.oracle.com/security-alerts/cpujan2021.html"
    },
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      "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
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      "url": "https://www.oracle.com/security-alerts/cpuApr2021.html"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2021/dsa-5020"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20200504-0003"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2021/12/msg00017.html"
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      "url": "https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E"
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    },
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      "url": "https://lists.apache.org/thread.html/r48bcd06049c1779ef709564544c3d8a32ae6ee5c3b7281a606ac4463%40%3Cjira.kafka.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/r45916179811a32cbaa500f972de9098e6ee80ee81c7f134fce83e03a@%3Cissues.flink.apache.org%3E"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Improper validation of certificate with host mismatch in Apache Log4j SMTP appender"
}

GHSA-VWRP-7X3M-9644

Vulnerability from github – Published: 2022-05-14 03:17 – Updated: 2022-05-14 03:17
VLAI
Details

A spoofing vulnerability exists when the Azure IoT Device Provisioning AMQP Transport library improperly validates certificates over the AMQP protocol, aka "Azure IoT SDK Spoofing Vulnerability." This affects C# SDK, C SDK, Java SDK.

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

{
  "affected": [],
  "aliases": [
    "CVE-2018-8119"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-05-09T19:29:00Z",
    "severity": "MODERATE"
  },
  "details": "A spoofing vulnerability exists when the Azure IoT Device Provisioning AMQP Transport library improperly validates certificates over the AMQP protocol, aka \"Azure IoT SDK Spoofing Vulnerability.\" This affects C# SDK, C SDK, Java SDK.",
  "id": "GHSA-vwrp-7x3m-9644",
  "modified": "2022-05-14T03:17:42Z",
  "published": "2022-05-14T03:17:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-8119"
    },
    {
      "type": "WEB",
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8119"
    },
    {
      "type": "WEB",
      "url": "https://tools.cisco.com/security/center/viewAlert.x?alertId=57754\u0026vs_f=Alert%20RSS\u0026vs_cat=Security%20Intelligence\u0026vs_type=RSS\u0026vs_p=Microsoft%20Azure%20IoT%20SDK%20AMQP%20Transport%20Library%20Spoofing%20Vulnerability\u0026vs_k=1"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/104070"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-VX28-R268-G868

Vulnerability from github – Published: 2025-07-25 15:30 – Updated: 2025-07-25 15:30
VLAI
Details

IBM MQ Operator LTS 2.0.0 through 2.0.29, MQ Operator CD 3.0.0, 3.0.1, 3.1.0 through 3.1.3, 3.3.0, 3.4.0, 3.4.1, 3.5.0, 3.5.1, 3.6.0, and MQ Operator SC2 3.2.0 through 3.2.13 Internet Pass-Thru could allow a malicious user to obtain sensitive information from another TLS session connection by the proxy to the same hostname and port due to improper certificate validation.

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

{
  "affected": [],
  "aliases": [
    "CVE-2025-36005"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-24T15:15:26Z",
    "severity": "MODERATE"
  },
  "details": "IBM MQ Operator LTS 2.0.0 through 2.0.29, MQ Operator CD 3.0.0, 3.0.1, 3.1.0 through 3.1.3, 3.3.0, 3.4.0, 3.4.1, 3.5.0, 3.5.1, 3.6.0, and MQ Operator SC2 3.2.0 through 3.2.13 Internet Pass-Thru could allow a malicious user to obtain sensitive information from another TLS session connection by the proxy to the same hostname and port due to improper certificate validation.",
  "id": "GHSA-vx28-r268-g868",
  "modified": "2025-07-25T15:30:45Z",
  "published": "2025-07-25T15:30:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-36005"
    },
    {
      "type": "WEB",
      "url": "https://www.ibm.com/support/pages/node/7240431"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-VX9H-7FRF-374V

Vulnerability from github – Published: 2024-10-18 09:31 – Updated: 2024-10-22 18:32
VLAI
Details

A vulnerability has been identified in Bitdefender Total Security HTTPS scanning functionality where the software trusts a certificate issued by an entity that isn't authorized to issue certificates. This occurs when the "Basic Constraints" extension in the certificate indicates that it is meant to be an "End Entity”. This flaw could allow an attacker to perform a Man-in-the-Middle (MITM) attack, intercepting and potentially altering communications between the user and the website.

Severity
7.4 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
8.6 (High)
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2023-49570"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-10-18T09:15:02Z",
    "severity": "HIGH"
  },
  "details": "A vulnerability has been identified in Bitdefender Total Security HTTPS scanning functionality where the software trusts a certificate issued by an entity that isn\u0027t authorized to issue certificates. This occurs when the \"Basic Constraints\" extension in the certificate indicates that it is meant to be an \"End Entity\u201d. This flaw could allow an attacker to perform a Man-in-the-Middle (MITM) attack, intercepting and potentially altering communications between the user and the website.",
  "id": "GHSA-vx9h-7frf-374v",
  "modified": "2024-10-22T18:32:05Z",
  "published": "2024-10-18T09:31:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-49570"
    },
    {
      "type": "WEB",
      "url": "https://www.bitdefender.com/support/security-advisories/insecure-trust-of-basic-constraints-certificate-in-bitdefender-total-security-https-scanning-va-11210"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

GHSA-VXF6-WWJR-WQH4

Vulnerability from github – Published: 2022-05-24 16:45 – Updated: 2024-04-04 00:28
VLAI
Details

A vulnerability in the Secure Shell (SSH) authentication process of Cisco Small Business Switches software could allow an attacker to bypass client-side certificate authentication and revert to password authentication. The vulnerability exists because OpenSSH mishandles the authentication process. An attacker could exploit this vulnerability by attempting to connect to the device via SSH. A successful exploit could allow the attacker to access the configuration as an administrative user if the default credentials are not changed. There are no workarounds available; however, if client-side certificate authentication is enabled, disable it and use strong password authentication. Client-side certificate authentication is disabled by default.

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

{
  "affected": [],
  "aliases": [
    "CVE-2019-1859"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-285",
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-05-03T17:29:00Z",
    "severity": "HIGH"
  },
  "details": "A vulnerability in the Secure Shell (SSH) authentication process of Cisco Small Business Switches software could allow an attacker to bypass client-side certificate authentication and revert to password authentication. The vulnerability exists because OpenSSH mishandles the authentication process. An attacker could exploit this vulnerability by attempting to connect to the device via SSH. A successful exploit could allow the attacker to access the configuration as an administrative user if the default credentials are not changed. There are no workarounds available; however, if client-side certificate authentication is enabled, disable it and use strong password authentication. Client-side certificate authentication is disabled by default.",
  "id": "GHSA-vxf6-wwjr-wqh4",
  "modified": "2024-04-04T00:28:19Z",
  "published": "2022-05-24T16:45:10Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-1859"
    },
    {
      "type": "WEB",
      "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-scbv"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-W2JC-6HPR-7CWC

Vulnerability from github – Published: 2022-05-24 17:46 – Updated: 2022-05-24 17:46
VLAI
Details

The Proofpoint Insider Threat Management Agents (formerly ObserveIT Agent) for MacOS and Linux perform improper validation of the ITM Server's certificate, which enables a remote attacker to intercept and alter these communications using a man-in-the-middle attack. All versions before 7.11.1 are affected. Agents for Windows and Cloud are not affected.

Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2021-27899"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-04-06T21:15:00Z",
    "severity": "HIGH"
  },
  "details": "The Proofpoint Insider Threat Management Agents (formerly ObserveIT Agent) for MacOS and Linux perform improper validation of the ITM Server\u0027s certificate, which enables a remote attacker to intercept and alter these communications using a man-in-the-middle attack. All versions before 7.11.1 are affected. Agents for Windows and Cloud are not affected.",
  "id": "GHSA-w2jc-6hpr-7cwc",
  "modified": "2022-05-24T17:46:37Z",
  "published": "2022-05-24T17:46:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-27899"
    },
    {
      "type": "WEB",
      "url": "https://www.proofpoint.com/us/security/security-advisories/pfpt-sa-2021-0004"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}
Mitigation
Architecture and Design Implementation

Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.

Mitigation
Implementation

If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the hostname.

CAPEC-459: Creating a Rogue Certification Authority Certificate

An adversary exploits a weakness resulting from using a hashing algorithm with weak collision resistance to generate certificate signing requests (CSR) that contain collision blocks in their "to be signed" parts. The adversary submits one CSR to be signed by a trusted certificate authority then uses the signed blob to make a second certificate appear signed by said certificate authority. Due to the hash collision, both certificates, though different, hash to the same value and so the signed blob works just as well in the second certificate. The net effect is that the adversary's second X.509 certificate, which the Certification Authority has never seen, is now signed and validated by that Certification Authority.

CAPEC-475: Signature Spoofing by Improper Validation

An adversary exploits a cryptographic weakness in the signature verification algorithm implementation to generate a valid signature without knowing the key.

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