Oracle VirtualBox VRDP Heap-based Buffer Overflow Remote Code Execution Vulnerability

April 22nd, 2021
ZDI-21-453 ZDI-CAN-12407

CVE ID

CVE-2021-2279

CVSS Score

8.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors

Oracle

Affected Products

VirtualBox

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Oracle VirtualBox. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the handling of drdynvc packets. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the RDP service.

Additional Details

Oracle has issued an update to correct this vulnerability. More details can be found at:
https://www.oracle.com/security-alerts/cpuapr2021.html

Disclosure Timeline

  • 2021-01-05 - Vulnerability reported to vendor
  • 2021-04-22 - Coordinated public release of advisory

Credit

JungHyun Kim(@jidoc01) of VirtualBoBs

Back to Advisories