MIT Kerberos 5: Arbitrary Remote Code Execution

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200701-21 / mit-krb5
Release Date	January 24, 2007
Latest Revision	January 24, 2007: 01
Impact	high
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
app-crypt/mit-krb5	< 1.5.2	>= 1.5.2	All supported architectures

Related bugreports: #158810

Synopsis

Multiple vulnerabilities in MIT Kerberos 5 could potentially result in the execution of arbitrary code.

2. Impact Information

Background

MIT Kerberos 5 is a suite of applications that implement the Kerberos network protocol.

Description

The Kerberos administration daemon, and possibly other applications using the GSS-API or RPC libraries, could potentially call a function pointer in a freed heap buffer, or attempt to free an uninitialized pointer.

Impact

A remote attacker may be able to crash an affected application, or potentially execute arbitrary code with root privileges.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All MIT Kerberos 5 users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-crypt/mit-krb5-1.5.2"

4. References

Updated January 24, 2007

Summary: This is a Gentoo Linux Security Advisory

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