Software Engineering Institute

Juniper IVE OS is an operating system used by Juniper devices, such as the Juniper Networks Secure Access SSL VPN units. The IVE client software includes an ActiveX control, which is used to allow an Internet Explorer client system to connect to the IVE server. The ActiveX control provided by IVE OS contains a buffer overflow vulnerability.

By convincing a user to view a specially crafted HTML document (e.g., a web page, an HTML email message, or an HTML email attachment), an attacker may be able to execute arbitrary code with the privileges of the user. The attacker could also cause Internet Explorer (or the program using the WebBrowser control) to crash.

Apply an update

Update the IVE software, as specified in Juniper alert PSN-2006-03-013. Note that all client systems must have the updated version of the Juniper ActiveX control installed in order to be protected against this vulnerability.

Disable ActiveX

Disabling ActiveX controls in the Internet Zone (or any zone used by an attacker) appears to prevent exploitation of this vulnerability. Instructions for disabling ActiveX in the Internet Zone can be found in the "Securing Your Web Browser" document and the Malicious Web Scripts FAQ.

Note that disabling ActiveX controls in the Internet Zone will reduce the functionality of some web sites. Putting the IVE server address in a zone that has ActiveX enabled, such as Trusted Sites, will retain IVE functionality.