Advisory Details

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of the Realtek RTL8811AU Wi-Fi driver. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the processing of 802.11 frames. 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 data structure. An attacker can leverage this vulnerability to execute code in the context of the kernel.

This vulnerability is being disclosed publicly without a patch in accordance with the ZDI 120 day deadline.

06/24/20 – ZDI reported the vulnerability to the vendor
10/07/20 – ZDI requested an update
10/28/20 – The vendor indicated they were working on a fix
11/09/20 – The vendor indicated they would provide a fix with the next update
11/09/20 – ZDI requested an ETA for the fix
11/17/20 – The vendor indicated the fix would be available on 11/27/20
11/23/20 – ZDI notified the vendor of the intention to publish the cases as a 0-day advisories on 11/30/20 if no update was published

-- Mitigation:
Given the nature of the vulnerability the only salient mitigation strategy is to restrict interaction with the application.

• 2020-06-24 - Vulnerability reported to vendor
• 2020-12-07 - Coordinated public release of advisory