CVE-2011-2535 Denial of service in n/a
Remote attackers can crash the Asterisk daemon via crafted IAX2 frames, causing denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2011-2535?
CVE-2011-2535 is a medium-severity denial of service vulnerability in Digium Asterisk, published on 6 Jul 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
chan_iax2.c in the IAX2 channel driver in Asterisk Open Source 1.4.x before 1.4.41.1, 1.6.2.x before 1.6.2.18.1, and 1.8.x before 1.8.4.3, and Asterisk Business Edition C.3 before C.3.7.3, accesses a memory address contained in an option control frame, which allows remote attackers to cause a denial of service (daemon crash) or possibly have unspecified other impact via a crafted frame.
Weakness: CWE-20
Which versions are affected by CVE-2011-2535?
It affects 1 product.
Products include Digium Asterisk.
How do I fix CVE-2011-2535?
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-2011-2535 being exploited?
There is no known exploitation of CVE-2011-2535 in the wild and no public exploit code.
Other vulnerabilities in Digium Asterisk
Sources
Also known as DEBIAN-CVE-2011-2535, GHSA-f83p-664c-8vw5.