Description
chain_sip in Asterisk Open Source 11.x before 11.23.1 and 13.x 13.11.1 and Certified Asterisk 11.6 before 11.6-cert15 and 13.8 before 13.8-cert3 allows remote attackers to cause a denial of service (port exhaustion).
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 | 1:13.11.2~dfsg-1 | — |
| Debian 8 | asterisk | 1:11.13.1~dfsg-2+deb8u1 | DSA-3700-1 |
| Debian 7 | asterisk | 1:1.8.13.1~dfsg1-3+deb7u5 | DLA-781-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | asterisk | No fix yet | — |
Advisories 2
- DLA-781-1 asterisk - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3700-1 asterisk - security update Debian Security (DSA / DLA) · Mar 9, 2026