{"id":"USN-4692-1","summary":"tar vulnerabilities","details":"Chris Siebenmann discovered that tar incorrectly handled extracting files\nresized during extraction when invoked with the --sparse flag. An attacker\ncould possibly use this issue to cause a denial of service. This issue\nonly affected Ubuntu 12.04 ESM, Ubuntu 14.04 ESM, Ubuntu 16.04 LTS and\nUbuntu 18.04 LTS. (CVE-2018-20482)\n\nDaniel Axtens discovered that tar incorrectly handled certain malformed\ntar files. If a user or automated system were tricked into processing a\nspecially crafted tar archive, a remote attacker could use this issue to\ncause tar to crash, resulting in a denial of service. (CVE-2019-9923)\n","modified":"2026-02-10T04:42:02Z","published":"2021-01-13T18:56:53Z","related":["UBUNTU-CVE-2018-20482","UBUNTU-CVE-2019-9923"],"upstream":["CVE-2018-20482","CVE-2019-9923","UBUNTU-CVE-2018-20482","UBUNTU-CVE-2019-9923"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4692-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-20482"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-9923"}],"affected":[{"package":{"name":"tar","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/tar@1.27.1-1ubuntu0.1+esm1?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.27.1-1ubuntu0.1+esm1"}]}],"versions":["1.26+dfsg-8","1.27-3","1.27-4","1.27.1-1","1.27.1-1ubuntu0.1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_version":"1.27.1-1ubuntu0.1+esm1","binary_name":"tar"},{"binary_version":"1.27.1-1ubuntu0.1+esm1","binary_name":"tar-scripts"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:14.04:LTS","cves":[{"id":"CVE-2018-20482","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]},{"id":"CVE-2019-9923","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4692-1.json"}},{"package":{"name":"tar","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/tar@1.28-2.1ubuntu0.2?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.28-2.1ubuntu0.2"}]}],"versions":["1.27.1-2","1.28-2ubuntu1","1.28-2.1","1.28-2.1ubuntu0.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1.28-2.1ubuntu0.2","binary_name":"tar"},{"binary_version":"1.28-2.1ubuntu0.2","binary_name":"tar-scripts"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:16.04:LTS","cves":[{"id":"CVE-2018-20482","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]},{"id":"CVE-2019-9923","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4692-1.json"}},{"package":{"name":"tar","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/tar@1.29b-2ubuntu0.2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.29b-2ubuntu0.2"}]}],"versions":["1.29b-2","1.29b-2ubuntu0.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1.29b-2ubuntu0.2","binary_name":"tar"},{"binary_version":"1.29b-2ubuntu0.2","binary_name":"tar-scripts"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:18.04:LTS","cves":[{"id":"CVE-2018-20482","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]},{"id":"CVE-2019-9923","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4692-1.json"}},{"package":{"name":"tar","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/tar@1.30+dfsg-7ubuntu0.20.04.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.30+dfsg-7ubuntu0.20.04.1"}]}],"versions":["1.30+dfsg-6","1.30+dfsg-7"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1.30+dfsg-7ubuntu0.20.04.1","binary_name":"tar"},{"binary_version":"1.30+dfsg-7ubuntu0.20.04.1","binary_name":"tar-scripts"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[{"id":"CVE-2019-9923","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4692-1.json"}}],"schema_version":"1.7.3"}