Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk prior to versions 18.20.1, 20.5.1, and 21.0.1, as well as certified-asterisk prior to 18.9-cert6, it is possible to read any arbitrary file even when the `live_dangerously` is not enabled. This allows arbitrary files to be read. Asterisk versions 18.20.1, 20.5.1, and 21.0.1, as well as certified-asterisk prior to 18.9-cert6, contain a fix for this issue.
https://lists.debian.org/debian-lts-announce/2023/12/msg00019.html
https://github.com/asterisk/asterisk/security/advisories/GHSA-8857-hfmw-vg8f
https://github.com/asterisk/asterisk/commit/424be345639d75c6cb7d0bd2da5f0f407dbd0bd5
https://github.com/asterisk/asterisk/blob/master/main/manager.c#L3757