{"id":"UBUNTU-CVE-2021-32686","details":"PJSIP is a free and open source multimedia communication library written in C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. In PJSIP before version 2.11.1, there are a couple of issues found in the SSL socket. First, a race condition between callback and destroy, due to the accepted socket having no group lock. Second, the SSL socket parent/listener may get destroyed during handshake. Both issues were reported to happen intermittently in heavy load TLS connections. They cause a crash, resulting in a denial of service. These are fixed in version 2.11.1.","modified":"2026-04-22T13:28:47.814466Z","published":"2021-07-23T22:15:00Z","related":["USN-8122-1"],"upstream":["CVE-2021-32686"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-32686"},{"type":"REPORT","url":"https://github.com/pjsip/pjproject/security/advisories/GHSA-cv8x-p47p-99wr"},{"type":"REPORT","url":"https://github.com/pjsip/pjproject/commit/d5f95aa066f878b0aef6a64e60b61e8626e664cd"},{"type":"REPORT","url":"https://github.com/pjsip/pjproject/pull/2716"},{"type":"REPORT","url":"https://github.com/pjsip/pjproject/releases/tag/2.11.1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-32686"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8122-1"}],"affected":[{"package":{"name":"pjproject","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/pjproject@2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.0.0.ast20130823-1","2.1.0.0.ast20130823-1+deb8u1build0.16.04.1","2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1","binary_name":"libpj2"},{"binary_version":"2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1","binary_name":"libpjlib-util2"},{"binary_version":"2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1","binary_name":"libpjmedia-audiodev2"},{"binary_version":"2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1","binary_name":"libpjmedia-codec2"},{"binary_version":"2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1","binary_name":"libpjmedia-videodev2"},{"binary_version":"2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1","binary_name":"libpjmedia2"},{"binary_version":"2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1","binary_name":"libpjnath2"},{"binary_version":"2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1","binary_name":"libpjsip-simple2"},{"binary_version":"2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1","binary_name":"libpjsip-ua2"},{"binary_version":"2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1","binary_name":"libpjsip2"},{"binary_version":"2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1","binary_name":"libpjsua2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-32686.json"}},{"package":{"name":"pjproject","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/pjproject@2.7.2~dfsg-1ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.2~dfsg-1ubuntu0.1~esm1"}]}],"versions":["2.6~dfsg-2","2.7~dfsg-1","2.7.1~dfsg-1","2.7.1~dfsg-1build1","2.7.2~dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpj2"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpjlib-util2"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpjmedia-audiodev2"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpjmedia-codec2"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpjmedia-videodev2"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpjmedia2"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpjnath2"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpjsip-simple2"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpjsip-ua2"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpjsip2"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpjsua2"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpjsua2-2v5"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"python-pjproject"}],"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-2021-32686.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]}