CVE-2008-3263 Denial of service in n/a

High 7.8 Published 22 Jul 2008 Updated 7 Aug 2024

Remote attackers can cause denial of service in Asterisk by flooding IAX2 POKE requests, exhausting resources.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2008-3263?

CVE-2008-3263 is a high-severity denial of service vulnerability in n/a, published on 22 Jul 2008. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-399

Which versions are affected by CVE-2008-3263?

It affects 1 product.

Products include Asterisk Asterisk.

How do I fix CVE-2008-3263?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2008-3263 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2008-3263 exists.

Public exploit code: 1 Exploit-DB entry.

Sources

Also known as DEBIAN-CVE-2008-3263, GHSA-w3xv-vhr5-qfqw.