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://downloads.asterisk.org/pub/security/
https://downloads.asterisk.org/pub/security/AST-2022-002.html
http://packetstormsecurity.com/files/166745/Asterisk-Project-Security-Advisory-AST-2022-002.html
https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html
Source: MITRE
Published: 2022-04-15
Updated: 2023-02-02
Type: CWE-918
Base Score: 6.4
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:N
Impact Score: 4.9
Exploitability Score: 10
Severity: MEDIUM
Base Score: 9.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Impact Score: 5.2
Exploitability Score: 3.9
Severity: CRITICAL