ghsa-2wf2-64hh-9h2m
Vulnerability from github
Published
2022-05-17 03:42
Modified
2025-04-12 12:57
Severity ?
8.4 (High) - CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details

pt_chown in the glibc package before 2.19-18+deb8u4 on Debian jessie; the elibc package before 2.15-0ubuntu10.14 on Ubuntu 12.04 LTS and before 2.19-0ubuntu6.8 on Ubuntu 14.04 LTS; and the glibc package before 2.21-0ubuntu4.2 on Ubuntu 15.10 and before 2.23-0ubuntu1 on Ubuntu 16.04 LTS and 16.10 lacks a namespace check associated with file-descriptor passing, which allows local users to capture keystrokes and spoof data, and possibly gain privileges, via pts read and write operations, related to debian/sysdeps/linux.mk. NOTE: this is not considered a vulnerability in the upstream GNU C Library because the upstream documentation has a clear security recommendation against the --enable-pt_chown option.

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{
  "affected": [],
  "aliases": [
    "CVE-2016-2856"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2016-03-14T01:59:00Z",
    "severity": "HIGH"
  },
  "details": "pt_chown in the glibc package before 2.19-18+deb8u4 on Debian jessie; the elibc package before 2.15-0ubuntu10.14 on Ubuntu 12.04 LTS and before 2.19-0ubuntu6.8 on Ubuntu 14.04 LTS; and the glibc package before 2.21-0ubuntu4.2 on Ubuntu 15.10 and before 2.23-0ubuntu1 on Ubuntu 16.04 LTS and 16.10 lacks a namespace check associated with file-descriptor passing, which allows local users to capture keystrokes and spoof data, and possibly gain privileges, via pts read and write operations, related to debian/sysdeps/linux.mk.  NOTE: this is not considered a vulnerability in the upstream GNU C Library because the upstream documentation has a clear security recommendation against the --enable-pt_chown option.",
  "id": "GHSA-2wf2-64hh-9h2m",
  "modified": "2025-04-12T12:57:49Z",
  "published": "2022-05-17T03:42:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-2856"
    },
    {
      "type": "WEB",
      "url": "http://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie\u0026id=09f7764882a81e13e7b5d87d715412283a6ce403"
    },
    {
      "type": "WEB",
      "url": "http://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie\u0026id=11475c083282c1582c4dd72eecfcb2b7d308c958"
    },
    {
      "type": "WEB",
      "url": "http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-2856.html"
    },
    {
      "type": "WEB",
      "url": "http://www.halfdog.net/Security/2015/PtChownArbitraryPtsAccessViaUserNamespace"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2016/02/23/3"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2016/03/07/2"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/84601"
    },
    {
      "type": "WEB",
      "url": "http://www.ubuntu.com/usn/USN-2985-1"
    },
    {
      "type": "WEB",
      "url": "http://www.ubuntu.com/usn/USN-2985-2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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