Description
tcptls.c in the TCP/TLS server in Asterisk Open Source 1.6.1.x before 1.6.1.23, 1.6.2.x before 1.6.2.17.1, and 1.8.x before 1.8.3.1 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) by establishing many short TCP sessions to services that use a certain TLS API.
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 | 1:1.8.3.3-1 | — |
| Debian 6.0 | asterisk | 1:1.6.2.9-2+squeeze2 | DSA-2225-1 |
| Debian 5.0 | asterisk | 1:1.4.21.2~dfsg-3+lenny2.1 | DSA-2225-1 |
Advisories 1
- DSA-2225-1 asterisk - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- FEDORA-2011-3945 vendor-advisory
- asterisk-handletcptlsconnection-dos(66140) vdb-entry
- http://downloads.asterisk.org/pub/security/AST-2011-004.html
- DSA-2225 vendor-advisory
- FEDORA-2011-3942 vendor-advisory
- [oss-security] 20110317 CVE request for Asterisk flaws mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=688678
- FEDORA-2011-3958 vendor-advisory
- ADV-2011-0686 vdb-entry
- ADV-2011-0790 vdb-entry
- 1025224 vdb-entry
- 46898 vdb-entry
- [oss-security] 20110321 Re: CVE request for Asterisk flaws mailing-list