vuln-ubuntu/data/osv/cve/2021/UBUNTU-CVE-2021-36770.json

{
  "schema_version": "1.7.0",
  "id": "UBUNTU-CVE-2021-36770",
  "details": "Encode.pm, as distributed in Perl through 5.34.0, allows local users to gain privileges via a Trojan horse Encode::ConfigLocal library (in the current working directory) that preempts dynamic module loading. Exploitation requires an unusual configuration, and certain 2021 versions of Encode.pm (3.05 through 3.11). This issue occurs because the || operator evaluates @INC in a scalar context, and thus @INC has only an integer value.",
  "aliases": [],
  "upstream": [
    "CVE-2021-36770"
  ],
  "related": [
    "USN-5033-1"
  ],
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
    },
    {
      "type": "Ubuntu",
      "score": "medium"
    }
  ],
  "published": "2021-08-09T00:00:00Z",
  "modified": "2026-10-17T09:08:29Z",
  "affected": [
    {
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "libencode-perl",
        "purl": "pkg:deb/ubuntu/libencode-perl@2.82-1?arch=source&distro=xenial"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "versions": [
        "2.76-1",
        "2.78-1",
        "2.78-1build1",
        "2.79-1",
        "2.82-1"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libencode-perl",
            "binary_version": "2.82-1"
          }
        ]
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libencode-perl",
        "purl": "pkg:deb/ubuntu/libencode-perl@3.16-1build1?arch=source&distro=jammy"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "versions": [
        "3.08-2",
        "3.16-1",
        "3.16-1build1"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libencode-perl",
            "binary_version": "3.16-1build1"
          }
        ]
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "perl",
        "purl": "pkg:deb/ubuntu/perl@5.32.1-3ubuntu3?arch=source&distro=jammy"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.32.1-3ubuntu3"
            }
          ]
        }
      ],
      "versions": [],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libperl5.32",
            "binary_version": "5.32.1-3ubuntu3"
          },
          {
            "binary_name": "perl",
            "binary_version": "5.32.1-3ubuntu3"
          },
          {
            "binary_name": "perl-base",
            "binary_version": "5.32.1-3ubuntu3"
          },
          {
            "binary_name": "perl-debug",
            "binary_version": "5.32.1-3ubuntu3"
          },
          {
            "binary_name": "perl-modules-5.32",
            "binary_version": "5.32.1-3ubuntu3"
          }
        ],
        "availability": "No subscription required"
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libencode-perl",
        "purl": "pkg:deb/ubuntu/libencode-perl@3.21-1build2?arch=source&distro=noble"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "versions": [
        "3.19-1build1",
        "3.20-1",
        "3.20-1build1",
        "3.21-1",
        "3.21-1build1",
        "3.21-1build2"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libencode-perl",
            "binary_version": "3.21-1build2"
          }
        ]
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "libencode-perl",
        "purl": "pkg:deb/ubuntu/libencode-perl@3.21-1build3?arch=source&distro=questing"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "versions": [
        "3.21-1build3"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libencode-perl",
            "binary_version": "3.21-1build3"
          }
        ]
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:26.10",
        "name": "libencode-perl",
        "purl": "pkg:deb/ubuntu/libencode-perl@3.24-1build1?arch=source&distro=stonking"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "versions": [
        "3.21-1build3",
        "3.24-1",
        "3.24-1build1"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libencode-perl",
            "binary_version": "3.24-1build1"
          }
        ]
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "libencode-perl",
        "purl": "pkg:deb/ubuntu/libencode-perl@3.21-1build3?arch=source&distro=resolute"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "versions": [
        "3.21-1build3"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libencode-perl",
            "binary_version": "3.21-1build3"
          }
        ]
      }
    }
  ],
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-36770"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5033-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-36770"
    }
  ]
}