ubuntu-cve-2021-23177
Vulnerability from osv_ubuntu
Published
2021-12-24 00:00
Modified
2026-05-21 16:58
Summary
Details

An improper link resolution flaw while extracting an archive can lead to changing the access control list (ACL) of the target of the link. An attacker may provide a malicious archive to a victim user, who would trigger this flaw when trying to extract the archive. A local attacker may use this flaw to change the ACL of a file on the system and gain more privileges.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
low
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "bsdcpio",
            "binary_version": "3.1.2-7ubuntu2.8+esm5"
          },
          {
            "binary_name": "bsdtar",
            "binary_version": "3.1.2-7ubuntu2.8+esm5"
          },
          {
            "binary_name": "libarchive13",
            "binary_version": "3.1.2-7ubuntu2.8+esm5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "libarchive",
        "purl": "pkg:deb/ubuntu/libarchive@3.1.2-7ubuntu2.8+esm5?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1.2-5ubuntu1",
        "3.1.2-7ubuntu1",
        "3.1.2-7ubuntu2",
        "3.1.2-7ubuntu2.1",
        "3.1.2-7ubuntu2.2",
        "3.1.2-7ubuntu2.3",
        "3.1.2-7ubuntu2.4",
        "3.1.2-7ubuntu2.6",
        "3.1.2-7ubuntu2.7",
        "3.1.2-7ubuntu2.8",
        "3.1.2-7ubuntu2.8+esm1",
        "3.1.2-7ubuntu2.8+esm3",
        "3.1.2-7ubuntu2.8+esm4",
        "3.1.2-7ubuntu2.8+esm5"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "bsdcpio",
            "binary_version": "3.1.2-11ubuntu0.16.04.8+esm3"
          },
          {
            "binary_name": "bsdtar",
            "binary_version": "3.1.2-11ubuntu0.16.04.8+esm3"
          },
          {
            "binary_name": "libarchive13",
            "binary_version": "3.1.2-11ubuntu0.16.04.8+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "libarchive",
        "purl": "pkg:deb/ubuntu/libarchive@3.1.2-11ubuntu0.16.04.8+esm3?arch=source\u0026distro=esm-infra-legacy/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1.2-11build1",
        "3.1.2-11ubuntu0.16.04.1",
        "3.1.2-11ubuntu0.16.04.2",
        "3.1.2-11ubuntu0.16.04.3",
        "3.1.2-11ubuntu0.16.04.4",
        "3.1.2-11ubuntu0.16.04.5",
        "3.1.2-11ubuntu0.16.04.6",
        "3.1.2-11ubuntu0.16.04.7",
        "3.1.2-11ubuntu0.16.04.8",
        "3.1.2-11ubuntu0.16.04.8+esm1",
        "3.1.2-11ubuntu0.16.04.8+esm2",
        "3.1.2-11ubuntu0.16.04.8+esm3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "bsdcpio",
            "binary_version": "3.2.2-3.1ubuntu0.7+esm3"
          },
          {
            "binary_name": "bsdtar",
            "binary_version": "3.2.2-3.1ubuntu0.7+esm3"
          },
          {
            "binary_name": "libarchive-tools",
            "binary_version": "3.2.2-3.1ubuntu0.7+esm3"
          },
          {
            "binary_name": "libarchive13",
            "binary_version": "3.2.2-3.1ubuntu0.7+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "libarchive",
        "purl": "pkg:deb/ubuntu/libarchive@3.2.2-3.1ubuntu0.7+esm3?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.2.2-3.1",
        "3.2.2-3.1ubuntu0.1",
        "3.2.2-3.1ubuntu0.2",
        "3.2.2-3.1ubuntu0.3",
        "3.2.2-3.1ubuntu0.4",
        "3.2.2-3.1ubuntu0.5",
        "3.2.2-3.1ubuntu0.6",
        "3.2.2-3.1ubuntu0.7",
        "3.2.2-3.1ubuntu0.7+esm1",
        "3.2.2-3.1ubuntu0.7+esm2",
        "3.2.2-3.1ubuntu0.7+esm3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libarchive-tools",
            "binary_version": "3.4.0-2ubuntu1.1"
          },
          {
            "binary_name": "libarchive13",
            "binary_version": "3.4.0-2ubuntu1.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libarchive",
        "purl": "pkg:deb/ubuntu/libarchive@3.4.0-2ubuntu1.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.4.0-2ubuntu1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.4.0-1",
        "3.4.0-1build1",
        "3.4.0-1ubuntu2",
        "3.4.0-2ubuntu1"
      ]
    }
  ],
  "aliases": [],
  "details": "An improper link resolution flaw while extracting an archive can lead to changing the access control list (ACL) of the target of the link. An attacker may provide a malicious archive to a victim user, who would trigger this flaw when trying to extract the archive. A local attacker may use this flaw to change the ACL of a file on the system and gain more privileges.",
  "id": "UBUNTU-CVE-2021-23177",
  "modified": "2026-05-21T16:58:36Z",
  "published": "2021-12-24T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-23177"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5291-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-23177"
    }
  ],
  "related": [
    "USN-5291-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-23177"
  ]
}



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