Description
A stack-based buffer overflow in res_rtp_asterisk.c in Sangoma Asterisk before 16.16.1, 17.x before 17.9.2, and 18.x before 18.2.1 and Certified Asterisk before 16.8-cert6 allows an authenticated WebRTC client to cause an Asterisk crash by sending multiple hold/unhold requests in quick succession. This is caused by a signedness comparison mismatch.
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.
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 | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | asterisk | 18.2.1-r0 | — |
| Alpine v3.23 | asterisk | 18.2.1-r0 | — |
| Alpine v3.22 | asterisk | 18.2.1-r0 | — |
| Alpine v3.21 | asterisk | 18.2.1-r0 | — |
| Alpine v3.20 | asterisk | 18.2.1-r0 | — |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | asterisk | 18.2.1-r0 | — |
| Alpine v3.18 | asterisk | 18.2.1-r0 | — |
| Alpine v3.17 | asterisk | 18.2.1-r0 | — |
| Alpine v3.16 | asterisk | 18.2.1-r0 | — |
| Alpine v3.15 | asterisk | 18.2.1-r0 | — |
| Alpine v3.14 | asterisk | 18.2.1-r0 | — |
| Alpine v3.13 | asterisk | 18.2.1-r0 | — |
| Alpine v3.12 | asterisk | 16.16.1-r0 | — |