CVE-2012-3812 Use after free in n/a
Remote authenticated users can crash the Asterisk voicemail daemon by triggering a double free error via specific mailbox access patterns.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2012-3812?
CVE-2012-3812 is a medium-severity use after free vulnerability in Digium Asterisk, published on 9 Jul 2012. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Double free vulnerability in apps/app_voicemail.c in Asterisk Open Source 1.8.x before 1.8.13.1 and 10.x before 10.5.2, Certified Asterisk 1.8.11-certx before 1.8.11-cert4, and Asterisk Digiumphones 10.x.x-digiumphones before 10.5.2-digiumphones allows remote authenticated users to cause a denial of service (daemon crash) by establishing multiple voicemail sessions and accessing both the Urgent mailbox and the INBOX mailbox.
Weakness: CWE-399
Which versions are affected by CVE-2012-3812?
It affects 3 products.
Products include Digium Asterisk, Digium Asteriske, Digium Certified Asterisk.
How do I fix CVE-2012-3812?
Upgrade to a fixed version.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2012-3812 being exploited?
There is no known exploitation of CVE-2012-3812 in the wild and no public exploit code.
Other vulnerabilities in Digium Asterisk
Sources
Also known as DEBIAN-CVE-2012-3812, GHSA-r2j8-5ch8-9m3x.