Advisory Details

October 15th, 2018

Oracle VirtualBox crServerDispatchGetAttachedShaders Integer Overflow Privilege Escalation Vulnerability

ZDI-18-1232
ZDI-CAN-6635

CVE ID CVE-2018-3086
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 crServerDispatchGetAttachedShaders method. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before allocating a buffer. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the hypervisor.

ADDITIONAL DETAILS Oracle has issued an update to correct this vulnerability. More details can be found at:
https://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
DISCLOSURE TIMELINE
  • 2018-07-10 - Vulnerability reported to vendor
  • 2018-10-15 - Coordinated public release of advisory
  • 2018-10-15 - Advisory Updated
CREDIT Root Object
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