USN-4552-3 (UBUNTU-CVE-2019-16729)

Vulnerability from osv_ubuntu – Published: 2020-10-28 16:23 – Updated: 2026-02-10 04:41 – Source website
VLAI
Summary
pam-python regression
Details

USN-4552-1 and USN-4552-2 fixed a vulnerability in Pam-python. The update introduced a regression which prevented PAM modules written in Python from importing python modules from site-specific directories.

We apologize for the inconvenience.

Original advisory details:

Malte Kraus discovered that Pam-python mishandled certain environment variables. A local attacker could potentially use this vulnerability to execute programs as root.

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2019-16729",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:16.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libpam-python",
            "binary_version": "1.0.4-1.1+deb8u1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "pam-python",
        "purl": "pkg:deb/ubuntu/pam-python@1.0.4-1.1+deb8u1ubuntu0.1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.4-1.1+deb8u1ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.4-1",
        "1.0.4-1.1+deb8u1build0.16.04.1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2019-16729",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libpam-python",
            "binary_version": "1.0.6-1.1+deb10u1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "pam-python",
        "purl": "pkg:deb/ubuntu/pam-python@1.0.6-1.1+deb10u1ubuntu0.1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.6-1.1+deb10u1ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.6-1",
        "1.0.6-1.1+deb10u1build0.18.04.1"
      ]
    }
  ],
  "aliases": [],
  "details": "USN-4552-1 and USN-4552-2 fixed a vulnerability in Pam-python. The update\nintroduced a regression which prevented PAM modules written in Python from\nimporting python modules from site-specific directories.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n Malte Kraus discovered that Pam-python mishandled certain environment variables.\n A local attacker could potentially use this vulnerability to execute programs\n as root.\n",
  "id": "USN-4552-3",
  "modified": "2026-02-10T04:41:56Z",
  "published": "2020-10-28T16:23:03Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4552-3"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-16729"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "pam-python regression",
  "upstream": [
    "UBUNTU-CVE-2019-16729"
  ]
}



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