MIT Kerberos 5: Arbitrary remote code execution

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200707-11 / mit-krb5
Release Date	July 25, 2007
Latest Revision	July 25, 2007: 01
Impact	high
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
app-crypt/mit-krb5	< 1.5.2-r3	>= 1.5.2-r3	All supported architectures

Related bugreports: #183338

Synopsis

Multiple vulnerabilities in MIT Kerberos 5 could potentially result in remote code execution with root privileges by unauthenticated users.

2. Impact Information

Background

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

Description

kadmind is affected by multiple vulnerabilities in the RPC library shipped with MIT Kerberos 5. It fails to properly handle zero-length RPC credentials (CVE-2007-2442) and the RPC library can write past the end of the stack buffer (CVE-2007-2443). Furthermore kadmind fails to do proper bounds checking (CVE-2007-2798).

Impact

A remote unauthenticated attacker could exploit these vulnerabilities to 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-r3"

4. References

Updated July 25, 2007

Summary: This is a Gentoo Linux Security Advisory

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