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

[DSA757] DSA-757-1 krb5 Vulnerability Scan

Vulnerability Scan Summary
DSA-757-1 krb5

Detailed Explanation for this Vulnerability Test

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
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 :
Threat Level: High

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