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Vulnerability Assessment & Network Security Forums |
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If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important. If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery. Home >> Browse Vulnerability Assessment Database >> Red Hat Local Security Checks >> RHSA-2004-236: krb Vulnerability Assessment Details
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RHSA-2004-236: krb |
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Check for the version of the krb packages Detailed Explanation for this Vulnerability Assessment Updated Kerberos 5 (krb5) packages which correct buffer overflows in the krb5_aname_to_localname function are now available. Kerberos is a network authentication system. 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. Users of Kerberos are advised to upgrade to these erratum packages which contain backported security patches to correct these issues. Solution : http://rhn.redhat.com/errata/RHSA-2004-236.html Network Security Threat Level: High Networks Security ID: Vulnerability Assessment Copyright: This script is Copyright (C) 2004 Tenable Network Security |
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