GHSA-WXVR-H7G5-RFC7

Vulnerability from github – Published: 2022-05-14 03:15 – Updated: 2025-04-12 13:04
VLAI?
Details

The TLS protocol 1.2 and earlier supports the rsa_fixed_dh, dss_fixed_dh, rsa_fixed_ecdh, and ecdsa_fixed_ecdh values for ClientCertificateType but does not directly document the ability to compute the master secret in certain situations with a client secret key and server public key but not a server secret key, which makes it easier for man-in-the-middle attackers to spoof TLS servers by leveraging knowledge of the secret key for an arbitrary installed client X.509 certificate, aka the "Key Compromise Impersonation (KCI)" issue.

Severity ?
8.1 (High)
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2015-8960"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2016-09-21T02:59:00Z",
    "severity": "HIGH"
  },
  "details": "The TLS protocol 1.2 and earlier supports the rsa_fixed_dh, dss_fixed_dh, rsa_fixed_ecdh, and ecdsa_fixed_ecdh values for ClientCertificateType but does not directly document the ability to compute the master secret in certain situations with a client secret key and server public key but not a server secret key, which makes it easier for man-in-the-middle attackers to spoof TLS servers by leveraging knowledge of the secret key for an arbitrary installed client X.509 certificate, aka the \"Key Compromise Impersonation (KCI)\" issue.",
  "id": "GHSA-wxvr-h7g5-rfc7",
  "modified": "2025-04-12T13:04:24Z",
  "published": "2022-05-14T03:15:57Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2015-8960"
    },
    {
      "type": "WEB",
      "url": "https://kcitls.org"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20180626-0002"
    },
    {
      "type": "WEB",
      "url": "https://www.usenix.org/system/files/conference/woot15/woot15-paper-hlauschek.pdf"
    },
    {
      "type": "WEB",
      "url": "http://twitter.com/matthew_d_green/statuses/630908726950674433"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2016/09/20/4"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/93071"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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