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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.
Vulnerability Assessment Details
Check for the version of the krb5 package
Detailed Explanation for this Vulnerability Assessment
The remote host is missing the patch for the advisory MDKSA-2005:119 (krb5).
A number of vulnerabilities have been corrected in this Kerberos update:
The rcp protocol would permit a server to instruct a client to write to
arbitrary files outside of the current directory. The Kerberos-aware rcp could
be abused to copy files from a malicious server (CVE-2004-0175).
Gael Delalleau discovered an information disclosure vulnerability in the way
some telnet clients handled messages from a server. This could be abused by a
malicious telnet server to collect information from the environment of any
victim connecting to the server using the Kerberos- aware telnet client
Daniel Wachdorf disovered that in error conditions that could occur in response
to correctly-formatted client requests, the Kerberos 5 KDC may attempt to free
uninitialized memory, which could cause the KDC to crash resulting in a Denial
of Service (CVE-2005-1174).
Daniel Wachdorf also discovered a single-byte heap overflow in the
krb5_unparse_name() function that could, if successfully exploited, lead to a
crash, resulting in a DoS. To trigger this flaw, a possible hacker would need to have
control of a Kerberos realm that shares a cross- realm key with the target
Finally, a double-free flaw was discovered in the krb5_recvauth() routine which
could be triggered by a remote unauthenticated attacker. This issue could
potentially be exploited to permit for the execution of arbitrary code on a KDC.
No exploit is currently known to exist (CVE-2005-1689).
The updated packages have been patched to address this issue and Mandriva urges
all users to upgrade to these packages as quickly as possible.
Solution : http://wwwnew.mandriva.com/security/advisories?name=MDKSA-2005:119
Network Security Threat Level: High
Networks Security ID:
Vulnerability Assessment Copyright: This script is Copyright (C) 2005 Tenable Network Security
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