{"id":"UBUNTU-CVE-2021-20193","details":"A flaw was found in the src/list.c of tar 1.33 and earlier. This flaw allows an attacker who can submit a crafted input file to tar to cause uncontrolled consumption of memory. The highest threat from this vulnerability is to system availability.","modified":"2026-02-04T03:13:15.291470Z","published":"2021-03-26T17:15:00Z","related":["USN-5329-1"],"upstream":["CVE-2021-20193"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-20193"},{"type":"REPORT","url":"https://savannah.gnu.org/bugs/?59897"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5329-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-20193"}],"affected":[{"package":{"name":"tar","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/tar@1.27.1-1ubuntu0.1+esm2?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.27.1-1ubuntu0.1+esm2"}]}],"versions":["1.26+dfsg-8","1.27-3","1.27-4","1.27.1-1","1.27.1-1ubuntu0.1","1.27.1-1ubuntu0.1+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"tar","binary_version":"1.27.1-1ubuntu0.1+esm2"},{"binary_name":"tar-scripts","binary_version":"1.27.1-1ubuntu0.1+esm2"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-20193.json"}},{"package":{"name":"tar","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/tar@1.28-2.1ubuntu0.2+esm1?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.28-2.1ubuntu0.2+esm1"}]}],"versions":["1.27.1-2","1.28-2ubuntu1","1.28-2.1","1.28-2.1ubuntu0.1","1.28-2.1ubuntu0.2"],"ecosystem_specific":{"binaries":[{"binary_name":"tar","binary_version":"1.28-2.1ubuntu0.2+esm1"},{"binary_name":"tar-scripts","binary_version":"1.28-2.1ubuntu0.2+esm1"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-20193.json"}},{"package":{"name":"tar","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/tar@1.29b-2ubuntu0.3?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.29b-2ubuntu0.3"}]}],"versions":["1.29b-2","1.29b-2ubuntu0.1","1.29b-2ubuntu0.2"],"ecosystem_specific":{"binaries":[{"binary_name":"tar","binary_version":"1.29b-2ubuntu0.3"},{"binary_name":"tar-scripts","binary_version":"1.29b-2ubuntu0.3"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-20193.json"}},{"package":{"name":"tar","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/tar@1.30+dfsg-7ubuntu0.20.04.2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.30+dfsg-7ubuntu0.20.04.2"}]}],"versions":["1.30+dfsg-6","1.30+dfsg-7","1.30+dfsg-7ubuntu0.20.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"tar","binary_version":"1.30+dfsg-7ubuntu0.20.04.2"},{"binary_name":"tar-scripts","binary_version":"1.30+dfsg-7ubuntu0.20.04.2"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-20193.json"}},{"package":{"name":"tar","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/tar@1.34+dfsg-1build1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.34+dfsg-1build1"}]}],"ecosystem_specific":{"binaries":[{"binary_name":"tar","binary_version":"1.34+dfsg-1build1"},{"binary_name":"tar-scripts","binary_version":"1.34+dfsg-1build1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-20193.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"low"}]}