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Home >> Browse Vulnerability Assessment Database >> Fedora Local Security Checks >> Fedora Core 2 2004-150: krb5

Fedora Core 2 2004-150: krb5

Vulnerability Assessment Summary Check for the version of the krb5 package Detailed Explanation for this Vulnerability Assessment The remote host is missing the patch for the advisory FEDORA-2004-150 (krb5). Kerberos V5 is a trusted-third-party network authentication system, which can improve your network's security by eliminating the insecure practice of cleartext passwords. Update Information: Bugs have been fixed in the krb5_aname_to_localname library function. Specifically, buffer overflows were possible for all Kerberos versions up to and including 1.3.3. The krb5_aname_to_localname function translates a Kerberos principal name to a local account name, typically a UNIX username. This function is frequently used when performing authorization checks. If configured with mappings from particular Kerberos principals to particular UNIX user names, certain functions called by krb5_aname_to_localname will not properly check the lengths of buffers used to store portions of the principal name. If configured to map principals to user names using rules, krb5_aname_to_localname would consistently write one byte past the end of a buffer allocated from the heap. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2004-0523 to this issue. Only configurations which enable the explicit mapping or rules-based mapping functionality of krb5_aname_to_localname() are vulnerable. These configurations are not the default. Solution : http://www.fedoranews.org/updates/FEDORA-2004-150.shtml Network Security Threat Level: High Networks Security ID: 10448 Vulnerability Assessment Copyright: This script is Copyright (C) 2004 Tenable Network Security

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