{"id":"USN-4761-1","summary":"git vulnerability","details":"Matheus Tavares discovered that Git incorrectly handled delay-capable\nclean/smudge filters when being used on case-insensitive filesystems. A\nremote attacker could possibly use this issue to execute arbitrary code.\n","modified":"2026-02-10T04:42:05Z","published":"2021-03-09T18:25:05Z","related":["UBUNTU-CVE-2021-21300"],"upstream":["CVE-2021-21300","UBUNTU-CVE-2021-21300"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4761-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-21300"}],"affected":[{"package":{"name":"git","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/git@1:2.7.4-0ubuntu1.10?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.7.4-0ubuntu1.10"}]}],"versions":["1:2.5.0-1","1:2.6.2-1","1:2.6.3-1","1:2.6.4-1","1:2.7.0~rc3-1","1:2.7.0-1","1:2.7.3-0ubuntu1","1:2.7.4-0ubuntu1","1:2.7.4-0ubuntu1.1","1:2.7.4-0ubuntu1.2","1:2.7.4-0ubuntu1.3","1:2.7.4-0ubuntu1.4","1:2.7.4-0ubuntu1.5","1:2.7.4-0ubuntu1.6","1:2.7.4-0ubuntu1.7","1:2.7.4-0ubuntu1.8","1:2.7.4-0ubuntu1.9"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"git","binary_version":"1:2.7.4-0ubuntu1.10"},{"binary_name":"git-all","binary_version":"1:2.7.4-0ubuntu1.10"},{"binary_name":"git-arch","binary_version":"1:2.7.4-0ubuntu1.10"},{"binary_name":"git-core","binary_version":"1:2.7.4-0ubuntu1.10"},{"binary_name":"git-cvs","binary_version":"1:2.7.4-0ubuntu1.10"},{"binary_name":"git-daemon-run","binary_version":"1:2.7.4-0ubuntu1.10"},{"binary_name":"git-daemon-sysvinit","binary_version":"1:2.7.4-0ubuntu1.10"},{"binary_name":"git-el","binary_version":"1:2.7.4-0ubuntu1.10"},{"binary_name":"git-email","binary_version":"1:2.7.4-0ubuntu1.10"},{"binary_name":"git-gui","binary_version":"1:2.7.4-0ubuntu1.10"},{"binary_name":"git-man","binary_version":"1:2.7.4-0ubuntu1.10"},{"binary_name":"git-mediawiki","binary_version":"1:2.7.4-0ubuntu1.10"},{"binary_name":"git-svn","binary_version":"1:2.7.4-0ubuntu1.10"},{"binary_name":"gitk","binary_version":"1:2.7.4-0ubuntu1.10"},{"binary_name":"gitweb","binary_version":"1:2.7.4-0ubuntu1.10"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4761-1.json","cves_map":{"ecosystem":"Ubuntu:16.04:LTS","cves":[{"id":"CVE-2021-21300","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}]}}},{"package":{"name":"git","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/git@1:2.17.1-1ubuntu0.8?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.17.1-1ubuntu0.8"}]}],"versions":["1:2.14.1-1ubuntu4","1:2.15.1-1ubuntu2","1:2.17.0-1ubuntu1","1:2.17.1-1ubuntu0.1","1:2.17.1-1ubuntu0.3","1:2.17.1-1ubuntu0.4","1:2.17.1-1ubuntu0.5","1:2.17.1-1ubuntu0.6","1:2.17.1-1ubuntu0.7"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"git","binary_version":"1:2.17.1-1ubuntu0.8"},{"binary_name":"git-all","binary_version":"1:2.17.1-1ubuntu0.8"},{"binary_name":"git-cvs","binary_version":"1:2.17.1-1ubuntu0.8"},{"binary_name":"git-daemon-run","binary_version":"1:2.17.1-1ubuntu0.8"},{"binary_name":"git-daemon-sysvinit","binary_version":"1:2.17.1-1ubuntu0.8"},{"binary_name":"git-el","binary_version":"1:2.17.1-1ubuntu0.8"},{"binary_name":"git-email","binary_version":"1:2.17.1-1ubuntu0.8"},{"binary_name":"git-gui","binary_version":"1:2.17.1-1ubuntu0.8"},{"binary_name":"git-man","binary_version":"1:2.17.1-1ubuntu0.8"},{"binary_name":"git-mediawiki","binary_version":"1:2.17.1-1ubuntu0.8"},{"binary_name":"git-svn","binary_version":"1:2.17.1-1ubuntu0.8"},{"binary_name":"gitk","binary_version":"1:2.17.1-1ubuntu0.8"},{"binary_name":"gitweb","binary_version":"1:2.17.1-1ubuntu0.8"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4761-1.json","cves_map":{"ecosystem":"Ubuntu:18.04:LTS","cves":[{"id":"CVE-2021-21300","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}]}}},{"package":{"name":"git","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/git@1:2.25.1-1ubuntu3.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.25.1-1ubuntu3.1"}]}],"versions":["1:2.20.1-2ubuntu1","1:2.24.0-1ubuntu1","1:2.24.0-1ubuntu2","1:2.25.0-1ubuntu1","1:2.25.1-1ubuntu1","1:2.25.1-1ubuntu2","1:2.25.1-1ubuntu3"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"git","binary_version":"1:2.25.1-1ubuntu3.1"},{"binary_name":"git-all","binary_version":"1:2.25.1-1ubuntu3.1"},{"binary_name":"git-cvs","binary_version":"1:2.25.1-1ubuntu3.1"},{"binary_name":"git-daemon-run","binary_version":"1:2.25.1-1ubuntu3.1"},{"binary_name":"git-daemon-sysvinit","binary_version":"1:2.25.1-1ubuntu3.1"},{"binary_name":"git-el","binary_version":"1:2.25.1-1ubuntu3.1"},{"binary_name":"git-email","binary_version":"1:2.25.1-1ubuntu3.1"},{"binary_name":"git-gui","binary_version":"1:2.25.1-1ubuntu3.1"},{"binary_name":"git-man","binary_version":"1:2.25.1-1ubuntu3.1"},{"binary_name":"git-mediawiki","binary_version":"1:2.25.1-1ubuntu3.1"},{"binary_name":"git-svn","binary_version":"1:2.25.1-1ubuntu3.1"},{"binary_name":"gitk","binary_version":"1:2.25.1-1ubuntu3.1"},{"binary_name":"gitweb","binary_version":"1:2.25.1-1ubuntu3.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4761-1.json","cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[{"id":"CVE-2021-21300","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}]}}}],"schema_version":"1.7.3"}