ghsa-gc5p-r2vh-qc88
Vulnerability from github
Published
2022-05-14 04:01
Modified
2022-05-14 04:01
Severity ?
7.5 (High) - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Details

In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client name or realm. The parser would unconditionally dereference NULL pointers in that case, leading to a segmentation fault. This is related to the _kdc_as_rep function in kdc/kerberos5.c and the der_length_visible_string function in lib/asn1/der_length.c.

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{
  "affected": [],
  "aliases": [
    "CVE-2017-17439"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2017-12-06T15:29:00Z",
    "severity": "HIGH"
  },
  "details": "In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client name or realm. The parser would unconditionally dereference NULL pointers in that case, leading to a segmentation fault. This is related to the _kdc_as_rep function in kdc/kerberos5.c and the der_length_visible_string function in lib/asn1/der_length.c.",
  "id": "GHSA-gc5p-r2vh-qc88",
  "modified": "2022-05-14T04:01:33Z",
  "published": "2022-05-14T04:01:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-17439"
    },
    {
      "type": "WEB",
      "url": "https://github.com/heimdal/heimdal/issues/353"
    },
    {
      "type": "WEB",
      "url": "https://github.com/heimdal/heimdal/commit/1a6a6e462dc2ac6111f9e02c6852ddec4849b887"
    },
    {
      "type": "WEB",
      "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=878144"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2017/dsa-4055"
    },
    {
      "type": "WEB",
      "url": "http://h5l.org/advisories.html?show=2017-12-08"
    },
    {
      "type": "WEB",
      "url": "http://www.h5l.org/pipermail/heimdal-announce/2017-December/000008.html"
    },
    {
      "type": "WEB",
      "url": "http://www.h5l.org/pipermail/heimdal-discuss/2017-August/000259.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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