Microsoft Internet Explorer URLMON.DLL COM Object Instantiation Remote Code Execution Vulnerability

2007-06-12T00:00:00
ID SMNTC-24372
Type symantec
Reporter Symantec Security Response
Modified 2007-06-12T00:00:00

Description

Description

Microsoft Internet Explorer is prone to remote code-execution vulnerability. A remote attacker can exploit this issue to execute arbitrary code in the context of the user running the vulnerable application.

Technologies Affected

  • Avaya CIE 1.0
  • Avaya Messaging Application Server
  • Avaya Messaging Application Server MM 2.0
  • Avaya Messaging Application Server MM 3.0
  • Avaya Messaging Application Server MM 3.1
  • HP Storage Management Appliance 2.1
  • HP Storage Management Appliance 2.1
  • Microsoft Internet Explorer 5.0.1
  • Microsoft Internet Explorer 5.0.1 SP1
  • Microsoft Internet Explorer 5.0.1 SP2
  • Microsoft Internet Explorer 5.0.1 SP3
  • Microsoft Internet Explorer 5.0.1 SP4
  • Microsoft Internet Explorer 6.0
  • Microsoft Internet Explorer 6.0 SP1
  • Nortel Networks Centrex IP Client Manager 7.0.0
  • Nortel Networks Centrex IP Client Manager 8.0.0
  • Nortel Networks Centrex IP Client Manager 9.0
  • Nortel Networks Centrex IP Client Manager

Recommendations

Run all software as a nonprivileged user with minimal access rights.
To reduce the impact of latent vulnerabilities, always run nonadministrative software as an unprivileged user with minimal access rights.

Do not follow links provided by unknown or untrusted sources.
Attackers could exploit this vulnerability by enticing a user to visit a malicious website. Do not follow links provided by sources of questionable integrity.

Set web browser security to disable the execution of script code or active content.
Users should disable support for script code and active content within a client browser to reduce the chances of a successful exploit. Note that this mitigation tactic might adversely affect legitimate websites that rely on the execution of browser-based script code.

Implement multiple redundant layers of security.
Since this issue may be leveraged to execute code, we recommend memory-protection schemes, such as non-executable stack/heap configurations and randomly mapped memory segments. This tactic may complicate exploits of memory-corruption vulnerabilities.

Microsoft has released security bulletin MS07-033 with fixes to address this issue. Please see the referenced bulletin for information on obtaining fixes.