GLSA 200409-09: MIT krb5: Multiple vulnerabilities

http://security.gentoo.org/

Severity:	high
Title:	MIT krb5: Multiple vulnerabilities
Date:	09/06/2004
Bugs:	#62417
ID:	200409-09

Synopsis

MIT krb5 contains several double-free vulnerabilities, potentially allowing the execution of arbitrary code, as well as a denial of service vulnerability.

Background

MIT krb5 is the free implementation of the Kerberos network authentication protocol by the Massachusetts Institute of Technology.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
app-crypt/mit-krb5	< 1.3.4	>= 1.3.4	All supported architectures

Description

The implementation of the Key Distribution Center (KDC) and the MIT krb5 library contain double-free vulnerabilities, making client programs as well as application servers vulnerable.

The ASN.1 decoder library is vulnerable to a denial of service attack, including the KDC.

Impact

The double-free vulnerabilities could allow an attacker to execute arbitrary code on a KDC host and hosts running krb524d or vulnerable services. In the case of a KDC host, this can lead to a compromise of the entire Kerberos realm. Furthermore, an attacker impersonating a legitimate KDC or application server can potentially execute arbitrary code on authenticating clients.

An attacker can cause a denial of service for a KDC or application server and clients, the latter if impersonating a legitimate KDC or application server.

Workaround

There is no known workaround at this time.

Resolution

All mit-krb5 users should upgrade to the latest stable version:

    # emerge sync

    # emerge -pv ">=app-crypt/mit-krb5-1.3.4"
    # emerge ">=app-crypt/mit-krb5-1.3.4"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200409-09.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.