Security advisory

{
  "id": "b14de7db7d1882a41c449729a91cf75f241304a30f85e85dca99d460b276680d",
  "url": "https://osv.dev/vulnerability/CVE-2021-29470",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-29470",
    "summary": "Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. An out-of-bounds read was found in Exiv2 versions v0.27.3 and earlier. The out-of-bounds read is triggered when Exiv2 is used to write metadata into a crafted image file. An attacker could potentially exploit the vulnerability to cause a denial of service by crashing Exiv2, if they can trick the victim into running Exiv2 on a crafted image file. Note that this bug is only triggered when writing the metadata, which is a less frequently used Exiv2 operation than reading the metadata. For example, to trigger the bug in the Exiv2 command-line application, you need to add an extra command-line argument such as insert. The bug is fixed in version v0.27.4.",
    "evidence": "osv:CVE-2021-29470",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-29470",
      "aliases": [
        "CVE-2021-29470",
        "GHSA-8949-hhfh-j7rj"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/exiv2/exiv2",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "194bb65ac568a5435874c9d9d73b1c8a68e4edec"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:exiv2:exiv2:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.27.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.27.3",
            "v0.27.3-RC2",
            "v0.27.3-RC1",
            "v0.27.2",
            "v0.27.2-RC3",
            "v0.27.2-RC2",
            "v0.27.2-RC1",
            "0.27-RC2",
            "v0.27.1",
            "0.27.1",
            "v0.27.1-RC1",
            "v0.27.0",
            "0.27",
            "0.27-RC3",
            "v0.27-RC1",
            "v0.26",
            "v0.25",
            "v0.24",
            "v0.23.1",
            "v0.23",
            "v0.22",
            "v0.21.1",
            "v0.21",
            "v0.20",
            "v0.19",
            "v0.18.2",
            "v0.18.1",
            "v0.18",
            "v0.18-pre2",
            "v0.18-pre1",
            "v0.17.1",
            "v0.17",
            "v0.16",
            "v0.16-pre1",
            "v0.15",
            "v0.14",
            "v0.13",
            "v0.12",
            "v0.11",
            "v0.10",
            "v0.9.1",
            "v0.9",
            "v0.8",
            "v0.7",
            "v0.6.2",
            "v0.6.1",
            "v0.6",
            "v0.5",
            "v0.4",
            "v0.3"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-29470.json"
          }
        }
      ],
      "modified": "2026-10-20T10:50:07.990408726Z",
      "provider": "osv",
      "references": [
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2XQT5F5IINTDYDAFGVGQZ7PMMLG7I5ZZ/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JWZLDECIXXW3CCZ3RS4A3NG5X5VE4WZM/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LBKWLTXM7IKZ4PVGKLUQVAVFAYGGF7QR/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/P2A5GMJEXQ5Q76JK6F6VKK5JYCLVFGKN/",
        "https://security.gentoo.org/glsa/202312-06",
        "https://github.com/Exiv2/exiv2/pull/1581",
        "https://github.com/Exiv2/exiv2/security/advisories/GHSA-8949-hhfh-j7rj"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
              "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "33"
                  },
                  {
                    "last_affected": "33"
                  },
                  {
                    "introduced": "34"
                  },
                  {
                    "last_affected": "34"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-29470",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 381322,
  "published_at": "2021-04-23T19:15:11.243+00:00"
}