An SSRF issue was discovered in Asterisk through 19.x. When using STIR/SHAKEN, it's possible to send arbitrary requests (such as GET) to interfaces such as localhost by using the Identity header. This is fixed in 16.25.2, 18.11.2, and 19.3.2.
https://www.debian.org/security/2022/dsa-5285
https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html
https://downloads.asterisk.org/pub/security/AST-2022-002.html
https://downloads.asterisk.org/pub/security/
http://packetstormsecurity.com/files/166745/Asterisk-Project-Security-Advisory-AST-2022-002.html