CVE-2012-2947 Denial of service in n/a

What is CVE-2012-2947?

CVE-2012-2947 is a low-severity denial of service vulnerability in Debian Debian Linux, published on 2 Jun 2012. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

chan_iax2.c in the IAX2 channel driver in Certified Asterisk 1.8.11-cert before 1.8.11-cert2 and Asterisk Open Source 1.8.x before 1.8.12.1 and 10.x before 10.4.1, when a certain mohinterpret setting is enabled, allows remote attackers to cause a denial of service (daemon crash) by placing a call on hold.

Weakness: CWE-284

Which versions are affected by CVE-2012-2947?

It affects 3 products.

Products include Debian Debian Linux, Digium Asterisk, Digium Certified Asterisk.

How do I fix CVE-2012-2947?

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-2012-2947 being exploited?

There is no known exploitation of CVE-2012-2947 in the wild and no public exploit code.

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• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2012-2947, GHSA-h4qr-ghfm-gmxm.