Description
An issue was discovered in Asterisk through 19.x. When using STIR/SHAKEN, it is possible to download files that are not certificates. These files could be much larger than what one would expect to download, leading to Resource Exhaustion. This is fixed in 16.25.2, 18.11.2, and 19.3.2.
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 | 1:18.11.2~dfsg+~cs6.10.40431413-1 | — |
| Debian 11 | asterisk | 1:16.28.0~dfsg-0+deb11u1 | DSA-5285-1 |
| Debian 10 | asterisk | 1:16.28.0~dfsg-0+deb10u1 | DLA-3194-1 |
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 | 18.11.2-r0 | — |
| Alpine v3.23 | asterisk | 18.11.2-r0 | — |
| Alpine v3.22 | asterisk | 18.11.2-r0 | — |
| Alpine v3.21 | asterisk | 18.11.2-r0 | — |
| Alpine v3.20 | asterisk | 18.11.2-r0 | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | asterisk | 18.11.2-r0 | — |
| Alpine v3.18 | asterisk | 18.11.2-r0 | — |
| Alpine v3.17 | asterisk | 18.11.2-r0 | — |
| Alpine v3.16 | asterisk | 18.11.2-r0 | — |
Advisories 3
- WID-SEC-2022-2107 Asterisk: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 12, 2026
- DSA-5285-1 asterisk - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3194-1 asterisk - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- https://downloads.asterisk.org/pub/security/
- https://downloads.asterisk.org/pub/security/AST-2022-001.html
- http://packetstormsecurity.com/files/166744/Asterisk-Project-Security-Advisory-AST-2022-001.html
- [debian-lts-announce] 20221117 [SECURITY] [DLA 3194-1] asterisk security update mailing-list
- DSA-5285 vendor-advisory
- http://packetstormsecurity.com/files/172139/Shannon-Baseband-chatroom-SDP-Attribute-Memory-Corruption.html