usn-5291-1
Vulnerability from osv_ubuntu
Published
2022-02-17 13:54
Modified
2026-04-22 07:37
Summary
libarchive vulnerabilities
Details

It was discovered that libarchive incorrectly handled symlinks. If a user or automated system were tricked into processing a specially crafted archive, an attacker could possibly use this issue to change modes, times, ACLs, and flags on arbitrary files. (CVE-2021-23177, CVE-2021-31566)

It was discovered that libarchive incorrectly handled certain RAR archives. If a user or automated system were tricked into processing a specially crafted RAR archive, an attacker could use this issue to cause libarchive to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2021-36976)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2021-23177",
              "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"
                }
              ]
            },
            {
              "id": "CVE-2021-31566",
              "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"
                }
              ]
            },
            {
              "id": "CVE-2021-36976",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:20.04:LTS"
        }
      },
      "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": "It was discovered that libarchive incorrectly handled symlinks. If a\nuser or automated system were tricked into processing a specially crafted\narchive, an attacker could possibly use this issue to change modes, times,\nACLs, and flags on arbitrary files. (CVE-2021-23177, CVE-2021-31566)\n\nIt was discovered that libarchive incorrectly handled certain RAR archives.\nIf a user or automated system were tricked into processing a specially\ncrafted RAR archive, an attacker could use this issue to cause libarchive\nto crash, resulting in a denial of service, or possibly execute arbitrary\ncode. (CVE-2021-36976)\n",
  "id": "USN-5291-1",
  "modified": "2026-04-22T07:37:01Z",
  "published": "2022-02-17T13:54:10Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5291-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-23177"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-31566"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-36976"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "libarchive vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2021-23177",
    "UBUNTU-CVE-2021-31566",
    "UBUNTU-CVE-2021-36976"
  ]
}



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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.