TITLE:
LSH lshd Seed-file File Descriptor Leak Vulnerability

SECUNIA ADVISORY ID:
SA18564

VERIFY ADVISORY:
http://secunia.com/advisories/18564/

CRITICAL:
Less critical

IMPACT:
Exposure of sensitive information, DoS

WHERE:
Local system

SOFTWARE:
LSH 2.x
http://secunia.com/product/4787/

DESCRIPTION:
A vulnerability has been reported in LSH, which can be exploited by
malicious, local users to gain knowledge of potentially sensitive
information or to cause a DoS (Denial of Service).

The vulnerability is caused due to lshd leaking the file descriptors
of the random generator's seed file to user shells started by lshd.
This can be exploited by to cause DoS by truncating the seed file or
to gain information of the seed value.

The vulnerability has been reported in version 2.0.1. Prior versions
may also be affected.

SOLUTION:
The vendor has provided a source code patch.
http://lists.lysator.liu.se/pipermail/lsh-bugs/2006q1/000467.html

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Stefan Pfetzing.

ORIGINAL ADVISORY:
http://lists.lysator.liu.se/pipermail/lsh-bugs/2006q1/000467.html

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