ghsa-wj9q-g984-cx8g
Vulnerability from github
Published
2022-05-24 17:03
Modified
2023-01-30 21:30
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details

OpenBSD through 6.6 allows local users to escalate to root because a check for LD_LIBRARY_PATH in setuid programs can be defeated by setting a very small RLIMIT_DATA resource limit. When executing chpass or passwd (which are setuid root), _dl_setup_env in ld.so tries to strip LD_LIBRARY_PATH from the environment, but fails when it cannot allocate memory. Thus, the attacker is able to execute their own library code as root.

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{
  "affected": [],
  "aliases": [
    "CVE-2019-19726"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-269"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-12-12T01:15:00Z",
    "severity": "HIGH"
  },
  "details": "OpenBSD through 6.6 allows local users to escalate to root because a check for LD_LIBRARY_PATH in setuid programs can be defeated by setting a very small RLIMIT_DATA resource limit. When executing chpass or passwd (which are setuid root), _dl_setup_env in ld.so tries to strip LD_LIBRARY_PATH from the environment, but fails when it cannot allocate memory. Thus, the attacker is able to execute their own library code as root.",
  "id": "GHSA-wj9q-g984-cx8g",
  "modified": "2023-01-30T21:30:22Z",
  "published": "2022-05-24T17:03:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-19726"
    },
    {
      "type": "WEB",
      "url": "https://seclists.org/bugtraq/2019/Dec/25"
    },
    {
      "type": "WEB",
      "url": "https://www.openbsd.org/errata66.html"
    },
    {
      "type": "WEB",
      "url": "https://www.openwall.com/lists/oss-security/2019/12/11/9"
    },
    {
      "type": "WEB",
      "url": "http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.html"
    },
    {
      "type": "WEB",
      "url": "http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.html"
    },
    {
      "type": "WEB",
      "url": "http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2019/Dec/31"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2023/Oct/11"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2023/10/03/2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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