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TITLE:
Dr.Web LHA Directory Name Buffer Overflow

SECUNIA ADVISORY ID:
SA22019

VERIFY ADVISORY:
http://secunia.com/advisories/22019/

CRITICAL:
Highly critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
Dr. Web 4.x
http://secunia.com/product/1217/

DESCRIPTION:
Sean-Sébastien Guay-Leroux has reported a vulnerability in Dr.Web,
which can be exploited by malicious people to cause a DoS (Denial of
Service) and potentially compromise a vulnerable system.

The vulnerability is caused due to a boundary error within the
processing of LHA archives with a long directory name in the extended
directory header. This can be exploited to cause a heap-based buffer
overflow via a specially crafted LHA archive.

Successful exploitation crashes the service and may allow execution
of arbitrary code.

The vulnerability has been reported in version 4.33. Other versions
may also be affected.

SOLUTION:
As a workaround, you can disable the scanning of archives by setting
the "CheckArchives" option in drweb.ini to "No".

PROVIDED AND/OR DISCOVERED BY:
Sean-Sébastien Guay-Leroux

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About:
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