CVE-2011-2665

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2011-07-06 · updated 2026-06-16

Description

reqresp_parser.c in the SIP channel driver in Asterisk Open Source 1.8.x before 1.8.4.3 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a SIP packet with a Contact header that lacks a < (less than) character.

Affected products

Digium Asterisk: 1.8.0, 1.8.0-beta1, 1.8.0-beta2, 1.8.0-beta3, 1.8.0-beta4, 1.8.0-beta5 (+26)

References

http://downloads.asterisk.org/pub/security/AST-2011-009-1.8.diff
http://downloads.asterisk.org/pub/security/AST-2011-009.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-July/062628.html
http://secunia.com/advisories/45048
http://secunia.com/advisories/45201
http://secunia.com/advisories/45239
http://www.debian.org/security/2011/dsa-2276
http://downloads.asterisk.org/pub/security/AST-2011-009-1.8.diff
http://downloads.asterisk.org/pub/security/AST-2011-009.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-July/062628.html
http://secunia.com/advisories/45048
http://secunia.com/advisories/45201

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