{"id":"UBUNTU-CVE-2021-33294","details":"In elfutils 0.183, an infinite loop was found in the function handle_symtab in readelf.c .Which allows attackers to cause a denial of service (infinite loop) via crafted file.","modified":"2026-04-22T12:54:26.284363Z","published":"2023-07-18T14:15:00Z","related":["USN-6322-1"],"upstream":["CVE-2021-33294"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-33294"},{"type":"REPORT","url":"https://sourceware.org/pipermail/elfutils-devel/2021q1/003607.html"},{"type":"REPORT","url":"https://sourceware.org/bugzilla/show_bug.cgi?id=27501"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6322-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-33294"}],"affected":[{"package":{"name":"elfutils","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/elfutils@0.158-0ubuntu5.3+esm1?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.158-0ubuntu5.3+esm1"}]}],"versions":["0.157-1ubuntu1","0.158-0ubuntu3","0.158-0ubuntu4","0.158-0ubuntu5","0.158-0ubuntu5.1","0.158-0ubuntu5.2","0.158-0ubuntu5.3"],"ecosystem_specific":{"priority_reason":"No real security impact as this is a command-line utility that is not generally expected to handle untrusted input.","availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_version":"0.158-0ubuntu5.3+esm1","binary_name":"elfutils"},{"binary_version":"0.158-0ubuntu5.3+esm1","binary_name":"libasm1"},{"binary_version":"0.158-0ubuntu5.3+esm1","binary_name":"libdw1"},{"binary_version":"0.158-0ubuntu5.3+esm1","binary_name":"libelf1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33294.json"}},{"package":{"name":"elfutils","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/elfutils@0.165-3ubuntu1.2+esm1?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.165-3ubuntu1.2+esm1"}]}],"versions":["0.163-4ubuntu1","0.163-5.1","0.164-1","0.165-3","0.165-3ubuntu1","0.165-3ubuntu1.1","0.165-3ubuntu1.2"],"ecosystem_specific":{"priority_reason":"No real security impact as this is a command-line utility that is not generally expected to handle untrusted input.","availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_version":"0.165-3ubuntu1.2+esm1","binary_name":"elfutils"},{"binary_version":"0.165-3ubuntu1.2+esm1","binary_name":"libasm1"},{"binary_version":"0.165-3ubuntu1.2+esm1","binary_name":"libdw1"},{"binary_version":"0.165-3ubuntu1.2+esm1","binary_name":"libelf1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33294.json"}},{"package":{"name":"elfutils","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/elfutils@0.170-0.4ubuntu0.1+esm1?arch=source&distro=esm-infra/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.170-0.4ubuntu0.1+esm1"}]}],"versions":["0.170-0.1","0.170-0.2","0.170-0.3","0.170-0.4","0.170-0.4ubuntu0.1"],"ecosystem_specific":{"priority_reason":"No real security impact as this is a command-line utility that is not generally expected to handle untrusted input.","availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_version":"0.170-0.4ubuntu0.1+esm1","binary_name":"elfutils"},{"binary_version":"0.170-0.4ubuntu0.1+esm1","binary_name":"libasm1"},{"binary_version":"0.170-0.4ubuntu0.1+esm1","binary_name":"libdw1"},{"binary_version":"0.170-0.4ubuntu0.1+esm1","binary_name":"libelf1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33294.json"}},{"package":{"name":"elfutils","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/elfutils@0.176-1.1ubuntu0.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.176-1.1ubuntu0.1"}]}],"versions":["0.176-1.1","0.176-1.1build1"],"ecosystem_specific":{"priority_reason":"No real security impact as this is a command-line utility that is not generally expected to handle untrusted input.","availability":"No subscription required","binaries":[{"binary_version":"0.176-1.1ubuntu0.1","binary_name":"elfutils"},{"binary_version":"0.176-1.1ubuntu0.1","binary_name":"libasm1"},{"binary_version":"0.176-1.1ubuntu0.1","binary_name":"libdw1"},{"binary_version":"0.176-1.1ubuntu0.1","binary_name":"libelf1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33294.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]}