CVE-2011-2529

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2011-07-06 · updated 2026-06-16
Weakness: CWE-119

Description

chan_sip.c in the SIP channel driver in Asterisk Open Source 1.6.x before 1.6.2.18.1 and 1.8.x before 1.8.4.3 does not properly handle '\0' characters in SIP packets, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted packet.

Affected products

Digium Asterisk: 1.6.0, 1.6.0-beta1, 1.6.0-beta2, 1.6.0-beta3, 1.6.0-beta4, 1.6.0-beta5 (+156)

References

http://downloads.asterisk.org/pub/security/AST-2011-008.diff
http://downloads.asterisk.org/pub/security/AST-2011-008.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://securitytracker.com/id?1025706
http://www.debian.org/security/2011/dsa-2276
http://www.osvdb.org/73307
http://www.securityfocus.com/bid/48431
https://exchange.xforce.ibmcloud.com/vulnerabilities/68203
http://downloads.asterisk.org/pub/security/AST-2011-008.diff

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