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Home >> Browse Vulnerability Assessment Database >> Mandrake Local Security Checks >> MDKSA-2005:119: krb5

Vulnerability Assessment Details

MDKSA-2005:119: 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 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 :
Network Security Threat Level: High

Networks Security ID:

Vulnerability Assessment Copyright: This script is Copyright (C) 2005 Tenable Network Security

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