This script is Copyright (C) 2004-2016 Tenable Network Security, Inc.
The remote Red Hat host is missing one or more security updates.
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.
See also :
Update the affected packages.
Risk factor :
Critical / CVSS Base Score : 10.0