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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
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.
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.
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
For the unstable distribution (sid), these problems have been fixed in
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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