ghsa-7cm4-q9wm-9w5g
Vulnerability from github
Published
2022-05-13 01:23
Modified
2025-04-20 03:40
Severity ?
8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Details

Heimdal before 7.4 allows remote attackers to impersonate services with Orpheus' Lyre attacks because it obtains service-principal names in a way that violates the Kerberos 5 protocol specification. In _krb5_extract_ticket() the KDC-REP service name must be obtained from the encrypted version stored in 'enc_part' instead of the unencrypted version stored in 'ticket'. Use of the unencrypted version provides an opportunity for successful server impersonation and other attacks. NOTE: this CVE is only for Heimdal and other products that embed Heimdal code; it does not apply to other instances in which this part of the Kerberos 5 protocol specification is violated.

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{
  "affected": [],
  "aliases": [
    "CVE-2017-11103"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-345"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2017-07-13T13:29:00Z",
    "severity": "HIGH"
  },
  "details": "Heimdal before 7.4 allows remote attackers to impersonate services with Orpheus\u0027 Lyre attacks because it obtains service-principal names in a way that violates the Kerberos 5 protocol specification. In _krb5_extract_ticket() the KDC-REP service name must be obtained from the encrypted version stored in \u0027enc_part\u0027 instead of the unencrypted version stored in \u0027ticket\u0027. Use of the unencrypted version provides an opportunity for successful server impersonation and other attacks. NOTE: this CVE is only for Heimdal and other products that embed Heimdal code; it does not apply to other instances in which this part of the Kerberos 5 protocol specification is violated.",
  "id": "GHSA-7cm4-q9wm-9w5g",
  "modified": "2025-04-20T03:40:40Z",
  "published": "2022-05-13T01:23:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-11103"
    },
    {
      "type": "WEB",
      "url": "https://github.com/heimdal/heimdal/releases/tag/heimdal-7.4.0"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/HT208112"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/HT208144"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/HT208221"
    },
    {
      "type": "WEB",
      "url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-17:05.heimdal.asc"
    },
    {
      "type": "WEB",
      "url": "https://www.orpheus-lyre.info"
    },
    {
      "type": "WEB",
      "url": "https://www.samba.org/samba/security/CVE-2017-11103.html"
    },
    {
      "type": "WEB",
      "url": "http://www.debian.org/security/2017/dsa-3912"
    },
    {
      "type": "WEB",
      "url": "http://www.h5l.org/advisories.html?show=2017-07-11"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/99551"
    },
    {
      "type": "WEB",
      "url": "http://www.securitytracker.com/id/1038876"
    },
    {
      "type": "WEB",
      "url": "http://www.securitytracker.com/id/1039427"
    }
  ],
  "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:H",
      "type": "CVSS_V3"
    }
  ]
}


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