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MIT Kerberos 5: Multiple local privilege escalation vulnerabilities

Content:

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200608-15 / MIT Kerberos 5
Release Date August 10, 2006
Latest Revision August 10, 2006: 01
Impact high
Exploitable local
Package Vulnerable versions Unaffected versions Architecture(s)
app-crypt/mit-krb5 < 1.4.3-r3 >= 1.4.3-r3 All supported architectures

Related bugreports: #143240

Synopsis

Some applications shipped with MIT Kerberos 5 are vulnerable to local privilege escalation.

2.  Impact Information

Background

MIT Kerberos 5 is a suite of applications that implement the Kerberos network protocol. It is designed to provide strong authentication for client/server applications by using secret-key cryptography.

Description

Unchecked calls to setuid() in krshd and v4rcp, as well as unchecked calls to seteuid() in kftpd and in ksu, have been found in the MIT Kerberos 5 program suite and may lead to a local root privilege escalation.

Impact

A local attacker could exploit this vulnerability to execute arbitrary code with elevated 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-krb5-1.4.3-r3"

4.  References



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Page updated August 10, 2006

Summary: This is a Gentoo Linux Security Advisory

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