| Name | CVE-2024-42491 |
| Description | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3925-1, ELA-1217-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| asterisk (PTS) | jessie, jessie (lts) | 1:11.13.1~dfsg-2+deb8u8 | vulnerable |
| stretch (security) | 1:13.14.1~dfsg-2+deb9u6 | fixed | |
| stretch (lts), stretch | 1:13.14.1~dfsg-2+deb9u10 | fixed | |
| buster, buster (lts) | 1:16.28.0~dfsg-0+deb10u5 | fixed | |
| buster (security) | 1:16.28.0~dfsg-0+deb10u4 | vulnerable | |
| bullseye | 1:16.28.0~dfsg-0+deb11u4 | vulnerable | |
| bullseye (security) | 1:16.28.0~dfsg-0+deb11u5 | fixed | |
| sid | 1:22.0.0~dfsg+~cs6.14.60671435-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| asterisk | source | jessie | (unfixed) | end-of-life | ||
| asterisk | source | stretch | (not affected) | |||
| asterisk | source | buster | 1:16.28.0~dfsg-0+deb10u5 | ELA-1217-1 | ||
| asterisk | source | bullseye | 1:16.28.0~dfsg-0+deb11u5 | DLA-3925-1 | ||
| asterisk | source | (unstable) | 1:20.9.3~dfsg+~cs6.14.60671435-1 |
https://github.com/asterisk/asterisk/security/advisories/GHSA-v428-g3cw-7hv9
https://github.com/asterisk/asterisk/commit/50bf8d4d3064930d28ecf1ce3397b14574d514d2 (18.24.3)
https://github.com/asterisk/asterisk/commit/a15050650abf09c10a3c135fab148220cd41d3a0 (20.9.3)
https://github.com/asterisk/asterisk/commit/4f01669c7c41c9184f3cce9a3cf1b2ebf6201742 (21.4.3)
[stretch] - asterisk <not-affected> (Vulnerable code not present)