Description
An issue was discovered in Sangoma Asterisk 13.x before 13.38.3, 16.x before 16.19.1, 17.x before 17.9.4, and 18.x before 18.5.1, and Certified Asterisk before 16.8-cert10. If the IAX2 channel driver receives a packet that contains an unsupported media format, a crash can occur.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | asterisk | 1:16.16.1~dfsg-2 | — |
| Debian 11 | asterisk | 1:16.16.1~dfsg-1+deb11u1 | DSA-4999-1 |
| Debian 9 | asterisk | 1:13.14.1~dfsg-2+deb9u5 | DLA-2729-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | asterisk | No fix yet | — |
| Ubuntu 26.04 LTS | asterisk | No fix yet | — |
| Ubuntu 25.10 | asterisk | No fix yet | — |
| Ubuntu 24.04 LTS | asterisk | No fix yet | — |
| Ubuntu 22.04 LTS | asterisk | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | asterisk | No fix yet | — |
| Ubuntu 18.04 LTS | asterisk | No fix yet | — |
| Ubuntu Pro 16.04 LTS | asterisk | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | asterisk | 18.2.2-r2 | — |
| Alpine v3.23 | asterisk | 18.2.2-r2 | — |
| Alpine v3.22 | asterisk | 18.2.2-r2 | — |
| Alpine v3.21 | asterisk | 18.2.2-r2 | — |
| Alpine v3.20 | asterisk | 18.2.2-r2 | — |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | asterisk | 18.2.2-r2 | — |
| Alpine v3.18 | asterisk | 18.2.2-r2 | — |
| Alpine v3.17 | asterisk | 18.2.2-r2 | — |
| Alpine v3.16 | asterisk | 18.2.2-r2 | — |
| Alpine v3.15 | asterisk | 18.2.2-r2 | — |
| Alpine v3.14 | asterisk | 18.2.2-r2 | — |
| Alpine v3.13 | asterisk | 18.2.1-r2 | — |
| Alpine v3.12 | asterisk | 16.16.1-r1 | — |
| Alpine v3.11 | asterisk | 16.6.2-r1 | — |
Advisories 3
- WID-SEC-2024-3631 Asterisk: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Mar 24, 2026
- DSA-4999-1 asterisk - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2729-1 asterisk - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- 20210722 AST-2021-008: Remote crash when using IAX2 channel driver mailing-list
- http://packetstormsecurity.com/files/163639/Asterisk-Project-Security-Advisory-AST-2021-008.html
- https://downloads.asterisk.org/pub/security/AST-2021-008.html
- https://issues.asterisk.org/jira/browse/ASTERISK-29392
- [debian-lts-announce] 20210804 [SECURITY] [DLA 2729-1] asterisk security update mailing-list
- DSA-4999 vendor-advisory