CVE-2021-33643 (GCVE-0-2021-33643)

Vulnerability from cvelistv5 – Published: 2022-08-09 00:00 – Updated: 2026-06-23 14:42
VLAI
Summary
An attacker who submits a crafted tar file with size in header struct being 0 may be able to trigger an calling of malloc(0) for a variable gnu_longlink, causing an out-of-bounds read.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-23 14:41 UTC
CWE
Assigner
openEuler CNA under the mitre root
CNA scorecard – unranked: 0 records in the last 180 days, 10 needed details
References
Impacted products
Vendor Product Version CPE status
n/a libtar Affected: <1.2.21
Show details on NVD website
To clipboard 

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              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "libtar",
              "vendor": "n/a",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c1.2.21"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "An attacker who submits a crafted tar file with size in header struct being 0 may be able to trigger an calling of malloc(0) for a variable gnu_longlink, causing an out-of-bounds read."
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-125",
                  "description": "CWE-125: Out-of-bounds Read",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2022-12-28T00:00:00.000Z",
            "orgId": "7e1ac599-2767-43fa-b3ea-f10178cc98f2",
            "shortName": "openEuler"
          },
          "references": [
            {
              "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1807"
            },
            {
              "name": "FEDORA-2022-fe1a4e3cf0",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5YSHZY753R7XW6CIKJVAWI373WW3YRRJ/"
            },
            {
              "name": "FEDORA-2022-50e8a1b51d",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OD4HEBSTI22FNYKOKK7W3X6ZQE6FV3XC/"
            },
            {
              "name": "FEDORA-2022-44a20bba43",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7Q26QDNOJDOFYWMJWEIK5XR62M2FF6IJ/"
            },
            {
              "name": "FEDORA-2022-88772d0a2d",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4S4PJRCJLEAWN2EKXGLSOBTL7O57V7NC/"
            },
            {
              "name": "FEDORA-2022-ccc68b06cc",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7WX5YE66CT7Y5C2HTHXSFDKQWYWYWJ2T/"
            }
          ]
        }
      },
      "cveMetadata": {
        "assignerOrgId": "7e1ac599-2767-43fa-b3ea-f10178cc98f2",
        "assignerShortName": "openEuler",
        "cveId": "CVE-2021-33643",
        "datePublished": "2022-08-09T00:00:00.000Z",
        "dateReserved": "2021-05-28T00:00:00.000Z",
        "dateUpdated": "2026-06-23T14:42:04.986Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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