{"id":"DEBIAN-CVE-2021-46837","details":"res_pjsip_t38 in Sangoma Asterisk 16.x before 16.16.2, 17.x before 17.9.3, and 18.x before 18.2.2, and Certified Asterisk before 16.8-cert7, allows an attacker to trigger a crash by sending an m=image line and zero port in a response to a T.38 re-invite initiated by Asterisk. This is a re-occurrence of the CVE-2019-15297 symptoms but not for exactly the same reason. The crash occurs because there is an append operation relative to the active topology, but this should instead be a replace operation.","modified":"2026-09-15T09:02:34.555067137Z","published":"2022-08-30T07:15:07.417Z","upstream":["CVE-2021-46837"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2021-46837"}],"affected":[{"package":{"name":"asterisk","ecosystem":"Debian:14","purl":"pkg:deb/debian/asterisk?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:18.9.0~dfsg+~cs6.10.40431411-1"}]}],"versions":["0.1.11-3","0.1.11-3woody1","1:1.0.5-2","1:1.0.5-4","1:1.0.6-1","1:1.0.6-2","1:1.0.7-1","1:1.0.7.dfsg.1-1","1:1.0.7.dfsg.1-2","1:1.0.7.dfsg.1-2sarge1","1:1.0.7.dfsg.1-2sarge2","1:1.0.7.dfsg.1-2sarge3","1:1.0.7.dfsg.1-2sarge4","1:1.0.7.dfsg.1-2sarge5","1:1.0.7.dfsg.1-2sarge6","1:1.0.9.dfsg-1","1:1.0.9.dfsg-3","1:1.0.9.dfsg-4","1:1.0.9.dfsg-5","1:1.0.9.dfsg-6","1:1.2.0-beta1.dfsg-1","1:1.2.0-beta2.dfsg-1","1:1.2.0-beta2.dfsg-2","1:1.2.0-beta2.dfsg-3","1:1.2.0-rc1.dfsg-1","1:1.2.0-rc2.dfsg-1","1:1.2.0.dfsg-1","1:1.2.0.dfsg-2","1:1.2.0.dfsg-3","1:1.2.0.dfsg-4","1:1.2.0.dfsg-5","1:1.2.0.dfsg-6","1:1.2.1.dfsg-1","1:1.2.1.dfsg-2","1:1.2.1.dfsg-3","1:1.2.10.dfsg-1","1:1.2.10.dfsg-1bpo1","1:1.2.10.dfsg-2","1:1.2.10.dfsg-3","1:1.2.11.dfsg-1","1:1.2.12.1.dfsg-1","1:1.2.13~dfsg-1","1:1.2.13~dfsg-2","1:1.2.13~dfsg-2etch1","1:1.2.13~dfsg-2etch2","1:1.2.13~dfsg-2etch3","1:1.2.13~dfsg-2etch4","1:1.2.14~dfsg-1","1:1.2.14~dfsg-2","1:1.2.14~dfsg-3","1:1.2.14~dfsg-4","1:1.2.15~dfsg-1","1:1.2.16~dfsg-1","1:1.2.17~dfsg-1","1:1.2.4.dfsg-1","1:1.2.4.dfsg-2","1:1.2.4.dfsg-3","1:1.2.4.dfsg-4","1:1.2.4.dfsg-5","1:1.2.4.dfsg-6","1:1.2.4.dfsg-6+b1","1:1.2.4.dfsg-7","1:1.2.7.1.dfsg-1","1:1.2.7.1.dfsg-2","1:1.2.7.1.dfsg-3","1:1.2.9.1.dfsg-1","1:1.4.10~dfsg-1","1:1.4.11~dfsg-1","1:1.4.11~dfsg-2","1:1.4.11~dfsg-3","1:1.4.11~dfsg-4","1:1.4.13~dfsg-1","1:1.4.15~dfsg-1","1:1.4.16.2~dfsg-1","1:1.4.16.2~dfsg-2","1:1.4.17~dfsg-1","1:1.4.17~dfsg-2","1:1.4.18.1~dfsg-1","1:1.4.18~dfsg-1","1:1.4.19.1~dfsg-1","1:1.4.20~dfsg-1","1:1.4.21.1~dfsg-1","1:1.4.21.2~dfsg-1","1:1.4.21.2~dfsg-2","1:1.4.21.2~dfsg-3","1:1.4.21.2~dfsg-3+lenny1","1:1.4.21.2~dfsg-3+lenny2","1:1.4.21.2~dfsg-3+lenny2.1","1:1.4.21.2~dfsg-3+lenny3","1:1.4.21.2~dfsg-3+lenny5","1:1.4.21.2~dfsg-3+lenny6","1:1.4.21.2~dfsg-3.1","1:1.4.2~dfsg-1","1:1.4.2~dfsg-2","1:1.4.2~dfsg-3","1:1.4.2~dfsg-4","1:1.4.2~dfsg-5","1:1.4.3~dfsg-1","1:1.4.4~dfsg-1","1:1.4.4~dfsg-2","1:1.4.4~dfsg-3","1:1.4.5~dfsg-1","1:1.4.6~dfsg-1","1:1.4.8~dfsg-1","1:1.4.8~dfsg-2","1:1.4.9~dfsg-1","1:1.6.1.0~dfsg-1","1:1.6.1.0~dfsg~rc3-1","1:1.6.2.0-1","1:1.6.2.0~dfsg~beta3-1","1:1.6.2.0~dfsg~rc1-1","1:1.6.2.0~rc3-1","1:1.6.2.0~rc3-2","1:1.6.2.0~rc6-1","1:1.6.2.0~rc7-1","1:1.6.2.2-1","1:1.6.2.6-1","1:1.6.2.7-1","1:1.6.2.9-1","1:1.6.2.9-1~bpo50+1","1:1.6.2.9-1~bpo50+2","1:1.6.2.9-1~bpo50+3","1:1.6.2.9-2","1:1.6.2.9-2+squeeze1","1:1.6.2.9-2+squeeze10","1:1.6.2.9-2+squeeze11","1:1.6.2.9-2+squeeze12","1:1.6.2.9-2+squeeze2","1:1.6.2.9-2+squeeze3","1:1.6.2.9-2+squeeze4","1:1.6.2.9-2+squeeze5","1:1.6.2.9-2+squeeze6","1:1.6.2.9-2+squeeze7","1:1.6.2.9-2+squeeze8","1:1.6.2.9-2+squeeze9","1:1.8.10.0~dfsg-1","1:1.8.10.1~dfsg-1","1:1.8.11.1~dfsg-1","1:1.8.13.0~dfsg-1","1:1.8.13.0~dfsg-1~bpo60+1","1:1.8.13.1~dfsg-1","1:1.8.13.1~dfsg-1+powerpcspe1","1:1.8.13.1~dfsg-1~bpo60+1","1:1.8.13.1~dfsg-2","1:1.8.13.1~dfsg-3","1:1.8.3.3-1","1:1.8.4-1","1:1.8.4.2-1","1:1.8.4.3-1","1:1.8.4.4~dfsg-1","1:1.8.4.4~dfsg-2","1:1.8.7.1~dfsg-1","1:1.8.7.1~dfsg-2","1:1.8.7.1~dfsg-3","1:1.8.8.0~dfsg-1","1:1.8.8.2~dfsg-1","1:11.10.0~dfsg-1","1:11.10.0~dfsg-1~bpo70+1","1:11.10.2~dfsg-1","1:11.10.2~dfsg-1~bpo70+1","1:11.11.0~dfsg-1","1:11.11.0~dfsg-1~bpo70+1","1:11.11.0~dfsg-2","1:11.12.0~dfsg-1","1:11.12.0~dfsg-1~bpo70+1","1:11.12.1~dfsg-1","1:11.13.0~dfsg-1","1:11.13.0~dfsg-1~bpo70+1","1:11.13.1~dfsg-1","1:11.13.1~dfsg-2","1:11.13.1~dfsg-2~bpo70+1","1:11.5.1~dfsg-1","1:11.5.1~dfsg-2","1:11.5.1~dfsg1-1","1:11.5.1~dfsg1-1~bpo70+1","1:11.6.0~dfsg-1","1:11.6.0~dfsg-2","1:11.6.0~dfsg-3","1:11.7.0~dfsg-1","1:11.7.0~dfsg-1+e1","1:11.7.0~dfsg-1~bpo70+1","1:11.8.0~dfsg-1","1:11.8.0~dfsg-2","1:11.8.1~dfsg-1","1:11.8.1~dfsg-1~bpo70+1","1:11.9.0~dfsg-1","1:11.9.0~dfsg-2","1:11.9.0~dfsg-2~bpo70+1","1:13.0.0~dfsg-1","1:13.0.0~dfsg-2","1:13.1.0~dfsg-1","1:13.1.0~dfsg-1.1","1:13.10.0~dfsg-1","1:13.11.2~dfsg-1","1:13.12.1~dfsg-1","1:13.12.2~dfsg-1","1:13.12.2~dfsg-2","1:13.13.1~dfsg-1","1:13.13.1~dfsg-2","1:13.13.1~dfsg-3","1:13.13.1~dfsg-3~exp1","1:13.13.1~dfsg-4","1:13.14.0~dfsg-1","1:13.14.0~dfsg-1~exp1","1:13.14.1~dfsg-1","1:13.14.1~dfsg-2","1:13.17.0~dfsg-1","1:13.17.0~dfsg-2","1:13.17.1~dfsg-1","1:13.17.2~dfsg-1","1:13.17.2~dfsg-2","1:13.18.1~dfsg-1","1:13.18.3~dfsg-1","1:13.18.5~dfsg-1","1:13.20.0~dfsg-1","1:13.22.0~dfsg-1","1:13.22.0~dfsg-2","1:13.23.1~dfsg-1","1:13.23.1~dfsg-2","1:13.7.2~dfsg-1","1:13.8.0~dfsg-1","1:13.8.2~dfsg-1","1:13.9.1~dfsg-1","1:13.9.1~dfsg-2","1:16.1.0~dfsg-1","1:16.1.0~dfsg-2","1:16.1.0~dfsg-3","1:16.1.0~dfsg-4","1:16.1.1~dfsg-1","1:16.10.0~dfsg-1","1:16.12.0~dfsg-1","1:16.15.0~dfsg-1",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