Advisory Details

August 18th, 2016

AVG Internet Security avgtdix.sys Kernel Memory Corruption Privilege Escalation Vulnerability

CVE ID
CVSS SCORE	6.6, AV:L/AC:M/Au:S/C:C/I:C/A:C
AFFECTED VENDORS	AVG
AFFECTED PRODUCTS	Internet Security
VULNERABILITY DETAILS	This vulnerability allows local attackers to escalate privileges on vulnerable installations of AVG Internet Security. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within processing of the 0x534a600c IOCTL in the avgtdix driver. A crafted buffer sent to this IOCTL causes memory corruption in the kernel. An attacker could leverage this vulnerability to execute arbitrary code in the context of SYSTEM.
ADDITIONAL DETAILS	AVG has issued an update to correct this vulnerability. More details can be found at: http://files-download.avg.com/inst/mp/AVG_Internet_Security_695.exe Patched in AVG Internet Security version 16.81.7639, which was released on May 26, 2016.
DISCLOSURE TIMELINE	2016-05-12 - Vulnerability reported to vendor 2016-08-18 - Coordinated public release of advisory
CREDIT	bee13oy of CloverSec Labs

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