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Credit:
The information has been provided by iDefense.
The original article can be found at:
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=584
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Vulnerable Systems:
* Check Point Zone Labs Zone Alarm Free version 6.5.737.0 (vsdatant.sys).
* (All other products within the Zone Alarm product line are suspected to be vulnerable).
* (Previous versions are also suspected to be vulnerable).
The problems specifically exist within the IOCTL handling code in the vsdatant.sys device driver. The device driver fails to validate user-land supplied addresses passed to IOCTL 0x8400000F and IOCTL 0x84000013.
Since the Irp parameters are not correctly validated, an attacker could utilize these IOCTLs to overwrite arbitrary memory with the constant double-word value of 0x60001 or the contents of a buffer returned from ZwQuerySystemInformation. This includes kernel memory as well as the code segments of running processes.
Exploitation allows an attacker to gain complete control of the affected machine. The access control mechanisms under a default installation allow restricted accounts to access the affected device drivers.
CVE Information:
CVE-2007-4216
Disclosure Timeline:
* 12/19/2006 - Initial vendor notification
* 12/20/2006 - Initial vendor response
* 08/20/2007 - Coordinated public disclosure
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