{"id":"UBUNTU-CVE-2021-29470","details":"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.","modified":"2026-04-22T14:41:09.854116Z","published":"2021-04-23T19:15:00Z","related":["USN-4941-1"],"upstream":["CVE-2021-29470"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-29470"},{"type":"REPORT","url":"https://github.com/Exiv2/exiv2/security/advisories/GHSA-8949-hhfh-j7rj"},{"type":"REPORT","url":"https://github.com/Exiv2/exiv2/pull/1581"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4941-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-29470"}],"affected":[{"package":{"name":"exiv2","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/exiv2@0.27.2-8ubuntu2.2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.27.2-8ubuntu2.2"}]}],"versions":["0.25-4ubuntu2","0.25-4ubuntu3","0.27.2-8ubuntu2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"exiv2","binary_version":"0.27.2-8ubuntu2.2"},{"binary_version":"0.27.2-8ubuntu2.2","binary_name":"libexiv2-27"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-29470.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}