Iván Rodriguez Almuiña has discovered a vulnerability in Proxy-Pro Professional GateKeeper, which can be exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to a boundary error in the web proxy ("GKHttp.dll"). This can be exploited to cause a buffer overflow by sending an overly long HTTP request or arbitrary string (about 4100 bytes) to the service or by tricking a user, whose HTTP traffic is processed by the proxy, to visit a malicious website or click a specially crafted link.

Successful exploitation may allow execution of arbitrary code with the privileges of "GKService.exe".

The vulnerability has been confirmed in version 4.7. Other versions may also be affected.

An exploit is available.

Solution
Disable the web proxy.
Further details available in Customer Area

Provided and/or discovered by
Iván Rodriguez Almuiña

Original Advisory
http://www.coromputer.net/index?m=articles&s=5&id=32&l=2

Deep Links
Links available in Customer Area