CVE-2008-3263

Severity: high (CVSS 7.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 28.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2008-07-22 · updated 2026-06-16
Weakness: CWE-399

Description

The IAX2 protocol implementation in Asterisk Open Source 1.0.x, 1.2.x before 1.2.30, and 1.4.x before 1.4.21.2; Business Edition A.x.x, B.x.x before B.2.5.4, and C.x.x before C.1.10.3; AsteriskNOW; Appliance Developer Kit 0.x.x; and s800i 1.0.x before 1.2.0.1 allows remote attackers to cause a denial of service (call-number exhaustion and CPU consumption) by quickly sending a large number of IAX2 (IAX) POKE requests.

Affected products

Asterisk: 0.1.0, 0.1.1, 0.1.2, 0.1.3, 0.1.4, 0.1.5 (+98)

References

http://downloads.digium.com/pub/security/AST-2008-010.html
http://downloads.securityfocus.com/vulnerabilities/exploits/30321.pl
http://secunia.com/advisories/31178
http://secunia.com/advisories/31194
http://secunia.com/advisories/34982
http://security.gentoo.org/glsa/glsa-200905-01.xml
http://www.securityfocus.com/archive/1/494675/100/0/threaded
http://www.securityfocus.com/bid/30321
http://www.securitytracker.com/id?1020535
http://www.vupen.com/english/advisories/2008/2168/references
https://exchange.xforce.ibmcloud.com/vulnerabilities/43942
https://www.redhat.com/archives/fedora-package-announce/2008-July/msg00839.html

Get alerted when CVE-2008-3263 or the next vulnerability affects your stack