{"id":"UBUNTU-CVE-2021-34121","details":"An Out of Bounds flaw was discovered in htmodoc 1.9.12 in function parse_tree() in toc.cxx, this possibly leads to memory layout information leaking in the data. This might be used in a chain of vulnerability in order to reach code execution.","modified":"2026-02-04T02:56:02.355831Z","published":"2023-07-18T14:15:00Z","related":["USN-7189-1"],"upstream":["CVE-2021-34121"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-34121"},{"type":"REPORT","url":"https://github.com/michaelrsweet/htmldoc/issues/433"},{"type":"REPORT","url":"https://github.com/michaelrsweet/htmldoc/commit/c67bbd8756f015e33e4ba639a40c7f9d8bd9e8ab"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-34121"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7189-1"}],"affected":[{"package":{"name":"htmldoc","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/htmldoc@1.8.27-8ubuntu1+esm3?arch=source&distro=esm-infra-legacy/trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.27-8ubuntu1+esm3"}]}],"versions":["1.8.27-8ubuntu1","1.8.27-8ubuntu1+esm1","1.8.27-8ubuntu1+esm2"],"ecosystem_specific":{"priority_reason":"No real security impact as this is a command-line utility that is not generally expected to handle untrusted input.","binaries":[{"binary_name":"htmldoc","binary_version":"1.8.27-8ubuntu1+esm3"},{"binary_name":"htmldoc-common","binary_version":"1.8.27-8ubuntu1+esm3"}],"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-34121.json"}},{"package":{"name":"htmldoc","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/htmldoc@1.8.27-8ubuntu1.1+esm2?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.27-8ubuntu1.1+esm2"}]}],"versions":["1.8.27-8ubuntu1","1.8.27-8ubuntu1.1","1.8.27-8ubuntu1.1+esm1"],"ecosystem_specific":{"priority_reason":"No real security impact as this is a command-line utility that is not generally expected to handle untrusted input.","binaries":[{"binary_name":"htmldoc","binary_version":"1.8.27-8ubuntu1.1+esm2"},{"binary_name":"htmldoc-common","binary_version":"1.8.27-8ubuntu1.1+esm2"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-34121.json"}},{"package":{"name":"htmldoc","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/htmldoc@1.9.2-1ubuntu0.2+esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.2-1ubuntu0.2+esm1"}]}],"versions":["1.8.27-8ubuntu2","1.8.27-8ubuntu3","1.9.2-1","1.9.2-1ubuntu0.1","1.9.2-1ubuntu0.2"],"ecosystem_specific":{"priority_reason":"No real security impact as this is a command-line utility that is not generally expected to handle untrusted input.","binaries":[{"binary_name":"htmldoc","binary_version":"1.9.2-1ubuntu0.2+esm1"},{"binary_name":"htmldoc-common","binary_version":"1.9.2-1ubuntu0.2+esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-34121.json"}},{"package":{"name":"htmldoc","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/htmldoc@1.9.7-1ubuntu0.3+esm1?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.7-1ubuntu0.3+esm1"}]}],"versions":["1.9.3-1","1.9.7-1","1.9.7-1build1","1.9.7-1ubuntu0.2","1.9.7-1ubuntu0.3"],"ecosystem_specific":{"priority_reason":"No real security impact as this is a command-line utility that is not generally expected to handle untrusted input.","binaries":[{"binary_name":"htmldoc","binary_version":"1.9.7-1ubuntu0.3+esm1"},{"binary_name":"htmldoc-common","binary_version":"1.9.7-1ubuntu0.3+esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-34121.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:H/I:H/A:H"},{"type":"Ubuntu","score":"low"}]}