CVE-2014-9421: Use After Free
The authgssapiunwrapdata function in lib/rpc/authgssapimisc.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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2014-9421?
CVE-2014-9421 is categorized as a denial of service vulnerability.
What versions of MIT Kerberos 5 are affected by CVE-2014-9421?
CVE-2014-9421 affects MIT Kerberos 5 versions 1.11.5, 1.12.x through 1.12.2, and 1.13.x before 1.13.1.
How do I fix CVE-2014-9421?
To fix CVE-2014-9421, upgrade to MIT Kerberos 5 version 1.13.1 or later.
Can CVE-2014-9421 be exploited remotely?
Yes, CVE-2014-9421 can be exploited by remote authenticated users.
What does the CVE-2014-9421 vulnerability affect in MIT Kerberos 5?
CVE-2014-9421 affects the auth_gssapi_unwrap_data function, specifically in handling partial XDR deserialization.