Advisory Details

January 18th, 2018

Oracle VirtualBox crUnpackPolygonStipple Untrusted Pointer Dereference Privilege Escalation Vulnerability

ZDI-18-122
ZDI-CAN-5261

CVE ID CVE-2018-2690
CVSS SCORE 6.9, (AV:L/AC:M/Au:N/C:C/I:C/A:C)
AFFECTED VENDORS Oracle
AFFECTED PRODUCTS VirtualBox
VULNERABILITY DETAILS


This vulnerability allows local attackers to execute arbitrary code on vulnerable installations of Oracle VirtualBox. An attacker must first obtain the ability to execute low-privileged code on the target guest system in order to exploit this vulnerability.

The specific flaw exists within the crUnpackPolygonStipple method. The issue results from the lack of proper validation of a user-supplied value prior to dereferencing it as a pointer. An attacker can leverage this vulnerability to escalate privileges and execute code under the context of the hypervisor.

VENDOR RESPONSE Oracle has issued an update to correct this vulnerability. More details can be found at:
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
DISCLOSURE TIMELINE
  • 2017-10-26 - Vulnerability reported to vendor
  • 2018-01-18 - Coordinated public release of advisory
CREDIT Vasily Vasiliev
BACK TO ADVISORIES