CVE-2014-9421 Use after free in n/a

Critical 9.0 Published 19 Feb 2015 Updated 6 Aug 2024

Remote authenticated users can cause denial of service or execute arbitrary code via malformed XDR data in MIT Kerberos 5.

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-2014-9421?

CVE-2014-9421 is a critical use after free vulnerability in Mit Kerberos 5, published on 19 Feb 2015. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

The auth_gssapi_unwrap_data function in lib/rpc/auth_gssapi_misc.c in MIT Kerberos 5 (aka krb5) through 1.11.5, 1.12.x through 1.12.2, and 1.13.x before 1.13.1 does not properly handle partial XDR deserialization, which allows remote authenticated users to cause a denial of service (use-after-free and double free, and daemon crash) or possibly execute arbitrary code via malformed XDR data, as demonstrated by data sent to kadmind.

Which versions are affected by CVE-2014-9421?

It affects 1 product.

Products include Mit Kerberos 5.

How do I fix CVE-2014-9421?

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-2014-9421 being exploited?

There is no known exploitation of CVE-2014-9421 in the wild and no public exploit code.

All Mit Kerberos 5 vulnerabilities

Sources

Also known as DEBIAN-CVE-2014-9421, GHSA-cv75-v3vc-j2vj, UBUNTU-CVE-2014-9421.