CVE-2024-42491
Asterisk is an open-source private branch exchange (PBX).
Impact
Asterisk is an open-source private branch exchange (PBX). Prior to versions 18.24.3, 20.9.3, and 21.4.3 of Asterisk and versions 18.9-cert12 and 20.7-cert2 of certified-asterisk, if Asterisk attempts to send a SIP request to a URI whose host portion starts with `.1` or `[.1]`, and res_resolver_unbound is loaded, Asterisk will crash with a SEGV. To receive a patch, users should upgrade to one of the following versions: 18.24.3, 20.9.3, 21.4.3, certified-18.9-cert12, certified-20.7-cert2. Two workarounds are available. Disable res_resolver_unbound by setting `noload = res_resolver_unbound.so` in modules.conf, or set `rewrite_contact = yes` on all PJSIP endpoints. NOTE: This may not be appropriate for all Asterisk configurations.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Sangoma | Asterisk | before 18.24.3 from 20.0.0 before 20.9.3 from 21.0.0 through 21.4.3 |
| Sangoma | Certified Asterisk | before 18.9 Versions 18.9, 20.7 |
Weakness classification
References
- NVD record
- CVE.org record
- https://github.com/asterisk/asterisk/commit/42a2f4ccfa2c7062a15063e765916b3332e34cc4
- https://github.com/asterisk/asterisk/commit/4f01669c7c41c9184f3cce9a3cf1b2ebf6201742
- https://github.com/asterisk/asterisk/commit/50bf8d4d3064930d28ecf1ce3397b14574d514d2
- https://github.com/asterisk/asterisk/commit/7a0090325bfa9d778a39ae5f7d0a98109e4651c8
- https://github.com/asterisk/asterisk/commit/a15050650abf09c10a3c135fab148220cd41d3a0
- https://github.com/asterisk/asterisk/security/advisories/GHSA-v428-g3cw-7hv9
- https://lists.debian.org/debian-lts-announce/2024/10/msg00016.html