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Family: Red Hat Local Security Checks --> Category: infos

RHSA-2004-448: krb Vulnerability Scan

Vulnerability Scan Summary
Check for the version of the krb packages

Detailed Explanation for this Vulnerability Test

Updated Kerberos (krb5) packages that correct double-free and ASN.1
parsing bugs are now available for Red Hat Enterprise Linux.

Kerberos is a networked authentication system that uses a trusted third
party (a KDC) to authenticate clients and servers to each other.

Several double-free bugs were found in the Kerberos 5 KDC and libraries. A
remote attacker could potentially exploit these flaws to execute arbitrary
code. The Common Vulnerabilities and Exposures project ( has
assigned the names CVE-2004-0642 and CVE-2004-0643 to these issues.

A double-free bug was also found in the krb524 server (CVE-2004-0772),
however this issue was fixed for Red Hat Enterprise Linux 2.1 users by a
previous erratum, RHSA-2003:052.

An infinite loop bug was found in the Kerberos 5 ASN.1 decoder library. A
remote attacker may be able to trigger this flaw and cause a denial of
service. The Common Vulnerabilities and Exposures project (
has assigned the name CVE-2004-0644 to this issue.

All users of krb5 should upgrade to these updated packages, which contain
backported security patches to resolve these issues.

Solution :
Threat Level: High

Click HERE for more information and discussions on this network vulnerability scan.


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