Advisory Details

November 11th, 2019

Oracle VirtualBox shader_get_registers_used Out-Of-Bounds Write Privilege Escalation Vulnerability

ZDI-19-965
ZDI-CAN-8674

CVE ID CVE-2019-2867
CVSS SCORE 8.2, (AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H)
AFFECTED VENDORS Oracle
AFFECTED PRODUCTS VirtualBox
VULNERABILITY DETAILS

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

The specific flaw exists within the shader_get_registers_used function. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated 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/security-alerts/cpujul2019.html
DISCLOSURE TIMELINE
  • 2019-07-18 - Vulnerability reported to vendor
  • 2019-11-11 - Coordinated public release of advisory
CREDIT huyna of Viettel Cyber Security
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