Advisory Details

January 17th, 2019

Oracle VirtualBox crStateDeleteRenderbuffersEXT Untrusted Pointer Dereference Privilege Escalation Vulnerability

ZDI-19-042
ZDI-CAN-6985

CVE ID CVE-2019-2520
CVSS SCORE 7.8, AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
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 crStateDeleteRenderbuffersEXT 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 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/cpujan2019-5072801.html
DISCLOSURE TIMELINE
  • 2018-07-30 - Vulnerability reported to vendor
  • 2019-01-17 - Coordinated public release of advisory
CREDIT Huy Ngo (Viettel Cyber Security)
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