McAfee Security Center IsOldAppInstalled ActiveX Buffer Overflow Vulnerability
9 May. 2007
McAfee Security Center is "a centralized configuration GUI utilized to control and monitor McAfee Security products such as their AntiVirus, Firewall and AntiSpam products". Remote exploitation of a buffer overflow in an ActiveX control distributed with McAfee Security Center could allow for the execution of arbitrary code.
* McAfee Virus Scan 10.0.27 running on Windows XP SP2
* McAfee Subscription manager versions 6.x prior to 126.96.36.199
* McAfee Subscription manager versions 7.x prior to 7.2.147
When McAfee Security products are installed, they register the following ActiveX control on the system:
File: MCSUBMGR.DLL, (McAfee Subscription manager module 188.8.131.52)
This control is registered as safe for scripting and contains a buffer overflow in its IsOldAppInstalled() method.
Exploitation of this vulnerability is trivial and allows for the execution of arbitrary code as the currently logged in user.
In order to be successful, attackers would need to convince a victim to go to a malicious web site. Although this attack requires some social engineering, the level required is considered minimal.
Publicly available COM object fuzzing tools such as COMRaider can find this vulnerability using default settings.
Note that this vulnerability is similar to "McAfee Subscription Manager Stack Buffer Overflow" that was published by eEye Digital Security. At the time of eEye's publishing, iDefense was aware of two additional vulnerabilities within this control. One, located in the GetUserRegisteredForBackend method, appears to have been fixed along with the issue eEye reported. The other is detailed in this advisory.
The following workarounds are available for this vulnerability:
Disable Active Scripting
Unregister the vulnerable control
Set the killbit for the vulnerable control
While these workarounds may prevent exploitation they may also adversely affect the operation of the McAfee product and should only be considered as short-term workarounds.
"Security Center 7.2.147 and 6.0.25 address the risk associated with this security flaw. These updates were made available for download on March 22, 2007. Most consumers will receive the updates automatically.
Consumers who have their McAfee products configured to update automatically should have already received the appropriate update and therefore will not need to take further action.
Consumers who have configured their McAfee products to update manually must run an update."