AVG Internet Security avgidsdriverx.sys Untrusted Pointer Dereference Privilege Escalation Vulnerability

August 18th, 2016
ZDI-16-483 ZDI-CAN-3732

CVE ID

CVSS Score

6.8 AV:L/AC:L/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 0x53606148 IOCTL in the avgidsdriverx 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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