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Heimdal rshd Privilege Escalation and Telnet Denial of Service
Secunia Advisory: SA18733
Release Date: 2006-02-07
Last Update: 2006-02-16
Popularity: 7,660 views

Critical:
Less critical
Impact: Privilege escalation
DoS
Where: From local network
Solution Status: Vendor Patch

Software:Heimdal 0.6.x
Heimdal 0.7.x

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CVE reference:CVE-2006-0582
CVE-2006-0677


Description:
Two vulnerabilities have been reported in Heimdal, which can be exploited by malicious, local users to gain escalated privileges or by malicious people to cause a DoS (Denial of Service).

1) An unspecified error in the rshd server when storing forwarded credentials can be exploited to overwrite a file with its credential cache and get ownership of the file.

2) A NULL pointer dereference error in the telnet service can be exploited to crash it.

Solution:
Update to version 0.7.2 or 0.6.6.

Provided and/or discovered by:
Reported by vendor.

Changelog:
2006-02-09: Added CVE reference.
2006-02-16: Added information about additional vulnerability.

Original Advisory:
http://www.pdc.kth.se/heimdal/advisory/2006-02-06/


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