{"id":"UBUNTU-CVE-2021-43845","details":"PJSIP is a free and open source multimedia communication library. In version 2.11.1 and prior, if incoming RTCP XR message contain block, the data field is not checked against the received packet size, potentially resulting in an out-of-bound read access. This affects all users that use PJMEDIA and RTCP XR. A malicious actor can send a RTCP XR message with an invalid packet size.","modified":"2026-03-25T18:29:51.828962Z","published":"2021-12-27T18:15:00Z","related":["USN-6422-1"],"upstream":["CVE-2021-43845"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-43845"},{"type":"REPORT","url":"https://github.com/pjsip/pjproject/security/advisories/GHSA-r374-qrwv-86hh"},{"type":"REPORT","url":"https://github.com/pjsip/pjproject/commit/f74c1fc22b760d2a24369aa72c74c4a9ab985859"},{"type":"REPORT","url":"https://github.com/pjsip/pjproject/pull/2924"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6422-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-43845"}],"affected":[{"package":{"name":"asterisk","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/asterisk@1:13.1.0~dfsg-1.1ubuntu4.1+esm1?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:13.1.0~dfsg-1.1ubuntu3","1:13.1.0~dfsg-1.1ubuntu4","1:13.1.0~dfsg-1.1ubuntu4.1","1:13.1.0~dfsg-1.1ubuntu4.1+esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1","binary_name":"asterisk"},{"binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1","binary_name":"asterisk-config"},{"binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1","binary_name":"asterisk-dahdi"},{"binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1","binary_name":"asterisk-dev"},{"binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1","binary_name":"asterisk-mobile"},{"binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1","binary_name":"asterisk-modules"},{"binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1","binary_name":"asterisk-mp3"},{"binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1","binary_name":"asterisk-mysql"},{"binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1","binary_name":"asterisk-ooh323"},{"binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1","binary_name":"asterisk-voicemail"},{"binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1","binary_name":"asterisk-voicemail-imapstorage"},{"binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1","binary_name":"asterisk-voicemail-odbcstorage"},{"binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1","binary_name":"asterisk-vpb"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-43845.json"}},{"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":"libpjproject-dev"},{"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-2021-43845.json"}},{"package":{"name":"asterisk","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/asterisk@1:13.18.3~dfsg-1ubuntu4?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:13.17.2~dfsg-1ubuntu1","1:13.17.2~dfsg-2ubuntu1","1:13.18.1~dfsg-1ubuntu1","1:13.18.3~dfsg-1ubuntu1","1:13.18.3~dfsg-1ubuntu2","1:13.18.3~dfsg-1ubuntu3","1:13.18.3~dfsg-1ubuntu4"],"ecosystem_specific":{"binaries":[{"binary_version":"1:13.18.3~dfsg-1ubuntu4","binary_name":"asterisk"},{"binary_version":"1:13.18.3~dfsg-1ubuntu4","binary_name":"asterisk-config"},{"binary_version":"1:13.18.3~dfsg-1ubuntu4","binary_name":"asterisk-dahdi"},{"binary_version":"1:13.18.3~dfsg-1ubuntu4","binary_name":"asterisk-dev"},{"binary_version":"1:13.18.3~dfsg-1ubuntu4","binary_name":"asterisk-mobile"},{"binary_version":"1:13.18.3~dfsg-1ubuntu4","binary_name":"asterisk-modules"},{"binary_version":"1:13.18.3~dfsg-1ubuntu4","binary_name":"asterisk-mp3"},{"binary_version":"1:13.18.3~dfsg-1ubuntu4","bina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