TITLE:
Blue Coat WinProxy Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA18288

VERIFY ADVISORY:
http://secunia.com/advisories/18288/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
>From local network

SOFTWARE:
WinProxy 5.x
http://secunia.com/product/1122/
WinProxy 4
http://secunia.com/product/1121/
WinProxy 6.x
http://secunia.com/product/6750/

DESCRIPTION:
Some vulnerabilities have been reported in Blue Coat WinProxy, which
can be exploited by malicious people to cause a DoS (Denial of
Service) and potentially compromise a vulnerable system.

1) A design error in the HTTP proxy in the handling of long HTTP
requests can cause an out-of-bounds memory access. This can be
exploited to crash the service via an overly long HTTP request of
approximately 32,768 bytes.

The vulnerability has been reported in version 6.0. Previous versions
are reportedly not affected.

2) A boundary error exists in the HTTP proxy in the handling of an
overly long "Host" header in a HTTP request. This can potentially be
exploited for arbitrary code execution.

The vulnerability has been reported in version 6.0. Prior versions
may also be vulnerable.

3) A design error in the Telnet proxy when handling a long input
string containing the "0xFF" character can cause heap corruption.
This can be exploited to crash the service.

The vulnerability has been reported in version 6.0. Prior versions
may also be vulnerable.

SOLUTION:
Update to version 6.1a.
http://www.winproxy.com/

PROVIDED AND/OR DISCOVERED BY:
1-2) FistFuXXer
3) Discovered by anonymous and reported via iDEFENSE.

ORIGINAL ADVISORY:
iDEFENSE:
http://www.idefense.com/intelligence/vulnerabilities/display.php?id=363
http://www.idefense.com/intelligence/vulnerabilities/display.php?id=364
http://www.idefense.com/intelligence/vulnerabilities/display.php?id=365

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