{"id":"UBUNTU-CVE-2021-26712","details":"Incorrect access controls in res_srtp.c in Sangoma Asterisk 13.38.1, 16.16.0, 17.9.1, and 18.2.0 and Certified Asterisk 16.8-cert5 allow a remote unauthenticated attacker to prematurely terminate secure calls by replaying SRTP packets.","modified":"2026-05-20T16:04:51.446823988Z","published":"2021-02-18T21:15:00Z","upstream":["CVE-2021-26712"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-26712"},{"type":"REPORT","url":"http://packetstormsecurity.com/files/161473/Asterisk-Project-Security-Advisory-AST-2021-003.html"},{"type":"REPORT","url":"http://seclists.org/fulldisclosure/2021/Feb/59"},{"type":"REPORT","url":"https://downloads.asterisk.org/pub/security/"},{"type":"REPORT","url":"https://downloads.asterisk.org/pub/security/AST-2021-003.html"},{"type":"REPORT","url":"https://issues.asterisk.org/jira/browse/ASTERISK-29260"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-26712"}],"affected":[{"package":{"name":"asterisk","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/asterisk?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:16.2.1~dfsg-2build2","1:16.2.1~dfsg-2build3","1:16.2.1~dfsg-2ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"asterisk","binary_version":"1:16.2.1~dfsg-2ubuntu1"},{"binary_name":"asterisk-config","binary_version":"1:16.2.1~dfsg-2ubuntu1"},{"binary_name":"asterisk-dahdi","binary_version":"1:16.2.1~dfsg-2ubuntu1"},{"binary_name":"asterisk-mobile","binary_version":"1:16.2.1~dfsg-2ubuntu1"},{"binary_name":"asterisk-modules","binary_version":"1:16.2.1~dfsg-2ubuntu1"},{"binary_version":"1:16.2.1~dfsg-2ubuntu1","binary_name":"asterisk-mp3"},{"binary_name":"asterisk-mysql","binary_version":"1:16.2.1~dfsg-2ubuntu1"},{"binary_name":"asterisk-ooh323","binary_version":"1:16.2.1~dfsg-2ubuntu1"},{"binary_version":"1:16.2.1~dfsg-2ubuntu1","binary_name":"asterisk-tests"},{"binary_name":"asterisk-voicemail","binary_version":"1:16.2.1~dfsg-2ubuntu1"},{"binary_name":"asterisk-voicemail-imapstorage","binary_version":"1:16.2.1~dfsg-2ubuntu1"},{"binary_name":"asterisk-voicemail-odbcstorage","binary_version":"1:16.2.1~dfsg-2ubuntu1"},{"binary_name":"asterisk-vpb","binary_version":"1:16.2.1~dfsg-2ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-26712.json"}},{"package":{"name":"asterisk","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/asterisk?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:16.16.1~dfsg-2","1:16.16.1~dfsg-4","1:16.16.1~dfsg-4build1","1:16.16.1~dfsg+~2.10-1","1:18.10.0~dfsg+~cs6.10.40431411-2"],"ecosystem_specific":{"binaries":[{"binary_name":"asterisk","binary_version":"1:18.10.0~dfsg+~cs6.10.40431411-2"},{"binary_version":"1:18.10.0~dfsg+~cs6.10.40431411-2","binary_name":"asterisk-config"},{"binary_name":"asterisk-dahdi","binary_version":"1:18.10.0~dfsg+~cs6.10.40431411-2"},{"binary_version":"1:18.10.0~dfsg+~cs6.10.40431411-2","binary_name":"asterisk-mobile"},{"binary_name":"asterisk-modules","binary_version":"1:18.10.0~dfsg+~cs6.10.40431411-2"},{"binary_name":"asterisk-mp3","binary_version":"1:18.10.0~dfsg+~cs6.10.40431411-2"},{"binary_version":"1:18.10.0~dfsg+~cs6.10.40431411-2","binary_name":"asterisk-mysql"},{"binary_name":"asterisk-ooh323","binary_version":"1:18.10.0~dfsg+~cs6.10.40431411-2"},{"binary_version":"1:18.10.0~dfsg+~cs6.10.40431411-2","binary_name":"asterisk-tests"},{"binary_version":"1:18.10.0~dfsg+~cs6.10.40431411-2","binary_name":"asterisk-vpb"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-26712.json"}},{"package":{"name":"asterisk","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/asterisk?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:20.4.0~dfsg+~cs6.13.40431414-2","1:20.5.0~dfsg+~cs6.13.40431414-1","1:20.5.1~dfsg+~cs6.13.40431414-1","1:20.5.2~dfsg+~cs6.13.40431414-1","1:20.6.0~dfsg+~cs6.13.40431414-1","1:20.6.0~dfsg+~cs6.13.40431414-2","1:20.6.0~dfsg+~cs6.13.40431414-2build3","1:20.6.0~dfsg+~cs6.13.40431414-2build4","1:20.6.0~dfsg+~cs6.13.40431414-2build5"],"ecosystem_specific":{"binaries":[{"binary_name":"asterisk","binary_version":"1:20.6.0~dfsg+~cs6.13.40431414-2build5"},{"binary_name":"asterisk-config","binary_version":"1:20.6.0~dfsg+~cs6.13.40431414-2build5"},{"binary_name":"asterisk-dahdi","binary_version":"1:20.6.0~dfsg+~cs6.13.40431414-2build5"},{"binary_name":"asterisk-mobile","binary_version":"1:20.6.0~dfsg+~cs6.13.40431414-2build5"},{"binary_version":"1:20.6.0~dfsg+~cs6.13.40431414-2build5","binary_name":"asterisk-modules"},{"binary_name":"asterisk-mp3","binary_version":"1:20.6.0~dfsg+~cs6.13.40431414-2build5"},{"binary_name":"asterisk-mysql","binary_version":"1:20.6.0~dfsg+~cs6.13.40431414-2build5"},{"binary_name":"asterisk-ooh323","binary_version":"1:20.6.0~dfsg+~cs6.13.40431414-2build5"},{"binary_name":"asterisk-tests","binary_version":"1:20.6.0~dfsg+~cs6.13.40431414-2build5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve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