Advisory Details

April 17th, 2019

Oracle VirtualBox CRClientPointer Use-After-Free Privilege Escalation Vulnerability

ZDI-19-377
ZDI-CAN-7363

CVE ID CVE-2019-2657
CVSS SCORE 7.8, AV:L/AC:L/PR:L/UI:N/S:U/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 handling of the CRClientPointer pointer. The issue results from the lack of validating the existence of an object prior to performing operations on the object. 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/cpuapr2019-5072813.html
DISCLOSURE TIMELINE
  • 2018-10-14 - Vulnerability reported to vendor
  • 2019-04-17 - Coordinated public release of advisory
CREDIT Jason Matthyser (pleasew8t) of MWR Labs
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