CVE-2026-23741
Description
Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, the asterisk/contrib/scripts/ast_coredumper runs as root, as noted by the NOTES tag on line 689 of the ast_coredumper file. The script will source the contents of /etc/asterisk/ast_debug_tools.conf, which resides in a folder that is writeable by the asterisk user:group. Due to the /etc/asterisk/ast_debug_tools.conf file following bash semantics and it being loaded; an attacker with write permissions may add or modify the file such that when the root ast_coredumper is run; it would source and thereby execute arbitrary bash code found in the /etc/asterisk/ast_debug_tools.conf. This issue has been patched in versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2.
How to fix
- sangoma asterisk20.18.2, 21.12.1, 22.8.2, 23.2.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| sangoma asterisk | v < 20.18.2, 21.0.0 ≤ v < 21.12.1, 22.0.0 ≤ v < 22.8.2, 23.0.0 ≤ v < 23.2.2 | 20.18.2, 21.12.1, 22.8.2, 23.2.2 |
| sangoma certified_asterisk | v ≤ 18.9, 20.7 | — |
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