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Home >> Browse Vulnerability Assessment Database >> Debian Local Security Checks >> [DSA757] DSA-757-1 krb5

Vulnerability Assessment Details

[DSA757] DSA-757-1 krb5

Vulnerability Assessment Summary
DSA-757-1 krb5

Detailed Explanation for this Vulnerability Assessment

Daniel Wachdorf reported two problems in the MIT krb5 distribution used
for network authentication. First, the KDC program from the krb5-kdc
package can corrupt the heap by trying to free memory which has already
been freed on receipt of a certain TCP connection. This vulnerability
can cause the KDC to crash, leading to a denial of service.
[CVE-2005-1174] Second, under certain rare circumstances this type of
request can lead to a buffer overflow and remote code execution.
[CVE-2005-1175]
Additionally, Magnus Hagander reported another problem in which the
krb5_recvauth function can in certain circumstances free previously
freed memory, potentially leading to the execution of remote code.
[CVE-2005-1689]
All of these vulnerabilities are believed difficult to exploit, and no
exploits have yet been discovered.
For the old stable distribution (woody), these problems have been fixed
in version 1.2.4-5woody10. Note that woody's KDC does not have TCP
support and is not vulnerable to CVE-2005-1174.
For the stable distribution (sarge), these problems have been fixed in
version 1.3.6-2sarge2.
For the unstable distribution (sid), these problems have been fixed in
version 1.3.6-4.
We recommend that you upgrade your krb5 package.

Solution : http://www.debian.org/security/2005/dsa-757
Network Security Threat Level: High

Networks Security ID:

Vulnerability Assessment Copyright: This script is (C) 2007 Michel Arboi

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