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Family: Mandrake Local Security Checks --> Category: infos

MDKSA-2005:119: krb5 Vulnerability Scan

Vulnerability Scan Summary
Check for the version of the krb5 package

Detailed Explanation for this Vulnerability Test

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 allow 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 allow 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 :
Threat Level: High

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


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