Description
An issue was discovered in res_pjsip_session.c in Digium Asterisk through 13.38.1; 14.x, 15.x, and 16.x through 16.16.0; 17.x through 17.9.1; and 18.x through 18.2.0, and Certified Asterisk through 16.8-cert5. An SDP negotiation vulnerability in PJSIP allows a remote server to potentially crash Asterisk by sending specific SIP responses that cause an SDP negotiation failure.
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-1 | — |
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 | — |
Advisories 1
- WID-SEC-2024-3633 Asterisk: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Dec 8, 2024
References
- https://downloads.asterisk.org/pub/security/
- 20210218 AST-2021-005: Remote Crash Vulnerability in PJSIP channel driver mailing-list
- https://downloads.asterisk.org/pub/security/AST-2021-005.html
- https://issues.asterisk.org/jira/browse/ASTERISK-29196
- http://packetstormsecurity.com/files/161477/Asterisk-Project-Security-Advisory-AST-2021-005.html