SapporoWorks WinProxy Buffer Overflow Vulnerability

Bugtraq ID:	1400
Class:	Boundary Condition Error
CVE:	CVE-2000-0593 CVE-2000-0592
Remote:	Yes
Local:	Yes
Published:	Jun 27 2000 12:00AM
Updated:	Jul 11 2009 02:56AM
Credit:	Discovered by UNYUN <[email protected]> and posted to Bugtraq on June 27, 2000 by Nobuo Miwa <[email protected]>.
Vulnerable:	SapporoWorks WinProxy 2.0.1 - Microsoft Windows 2000 Professional - Microsoft Windows 95 - Microsoft Windows 98 - Microsoft Windows NT 4.0 SapporoWorks WinProxy 2.0 - Microsoft Windows 2000 Professional - Microsoft Windows 95 - Microsoft Windows 98 - Microsoft Windows NT 4.0
Not Vulnerable:	SapporoWorks WinProxy 2.0.2 - Microsoft Windows 2000 Professional - Microsoft Windows 95 - Microsoft Windows 98 - Microsoft Windows NT 4.0

SapporoWorks WinProxy Buffer Overflow Vulnerability

Multiple unchecked buffers exist in the POP3 and HTTP Proxy components of SapporoWorks WinProxy which could open up the possibilities of denial of service attacks or remote execution of arbitrary code.

Performing a "GET /" on port 8080 will cause WinProxy to stop responding.

The USER, PASS, LIST, RETR, and DELE commands allow for arbitrary code to be executed when strings over 312 bytes are entered. The USER and PASS command are vulnerable to buffer overflow even without authentication procedures.

SapporoWorks WinProxy Buffer Overflow Vulnerability

Solution:
SapporoWorks has released version 2.0.2 which eliminates the vulnerability and is available for download at the following location:

http://homepage2.nifty.com/spw/winproxy/download.html

SapporoWorks WinProxy Buffer Overflow Vulnerability

References:

• WinProxy Product Homepage (SapporoWorks)