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.
2024-09-05T18:15:05.707
2025-08-26T17:47:36.190
Analyzed
CVSSv3.1: 5.7 (MEDIUM)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | sangoma | asterisk | < 18.24.3 | Yes |
| Application | sangoma | asterisk | < 20.9.3 | Yes |
| Application | sangoma | asterisk | ≤ 21.4.3 | Yes |
| Application | sangoma | certified_asterisk | < 18.9 | Yes |
| Application | sangoma | certified_asterisk | 18.9 | Yes |
| Application | sangoma | certified_asterisk | 18.9 | Yes |
| Application | sangoma | certified_asterisk | 18.9 | Yes |
| Application | sangoma | certified_asterisk | 18.9 | Yes |
| Application | sangoma | certified_asterisk | 18.9 | Yes |
| Application | sangoma | certified_asterisk | 18.9 | Yes |
| Application | sangoma | certified_asterisk | 18.9 | Yes |
| Application | sangoma | certified_asterisk | 18.9 | Yes |
| Application | sangoma | certified_asterisk | 18.9 | Yes |
| Application | sangoma | certified_asterisk | 18.9 | Yes |
| Application | sangoma | certified_asterisk | 18.9 | Yes |
| Application | sangoma | certified_asterisk | 18.9 | Yes |
| Application | sangoma | certified_asterisk | 18.9 | Yes |
| Application | sangoma | certified_asterisk | 18.9 | Yes |
| Application | sangoma | certified_asterisk | 18.9 | Yes |
| Application | sangoma | certified_asterisk | 20.7 | Yes |
| Application | sangoma | certified_asterisk | 20.7 | Yes |
| Application | sangoma | certified_asterisk | 20.7 | Yes |
| Application | sangoma | certified_asterisk | 20.7 | Yes |