Advisory Details

October 22nd, 2020

Oracle VirtualBox Shader Bytecode Out-Of-Bounds Read Information Disclosure Vulnerability

ZDI-20-1280
ZDI-CAN-11677

CVE ID CVE-2020-14886
CVSS SCORE 5.3, (AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N)
AFFECTED VENDORS Oracle
AFFECTED PRODUCTS VirtualBox
VULNERABILITY DETAILS

This vulnerability allows local attackers to disclose sensitive information 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_skip_unrecognized function. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to 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/cpuoct2020.html
DISCLOSURE TIMELINE
  • 2020-08-21 - Vulnerability reported to vendor
  • 2020-10-22 - Coordinated public release of advisory
CREDIT Anonymous
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