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TITLE:
SonicWALL SonicOS Logfile Parsing Format String Vulnerability

SECUNIA ADVISORY ID:
SA35250

VERIFY ADVISORY:
http://secunia.com/advisories/35250/

DESCRIPTION:
A vulnerability has been reported in SonicWALL SonicOS, which can be
exploited by malicious people to cause a DoS (Denial of Service) or
potentially compromise a vulnerable system.

The vulnerability is caused due to a format string error in the
logfile parsing function in SonicOS. This can be exploited to cause a
crash and potentially execute arbitrary code e.g. via a specially
crafted string containing format string specifiers in a query to a
restricted domain, in the XAUTH username when establishing a GroupVPN
tunnel, or in the username via the login page of the web frontend.

The vulnerability is reported in SonicWALL PRO 4100 with SonicOS
4.0.0.2-51e Standard and Enhanced. Other versions may also be
affected.

SOLUTION:
Do not use the SonicOS GUI to view the log files.

PROVIDED AND/OR DISCOVERED BY:
lofi42

ORIGINAL ADVISORY:
SEC Consult:
https://www.sec-consult.com/files/20090525-4-SonicOS-Format-String.txt

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