2021-34507 | Microsoft Windows Remote Assistance information disclosure

By Max On Jul 17, 2021

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4.7	$5k-$25k	0.64

A vulnerability classified as problematic was found in Microsoft Windows (Operating System). Affected by this vulnerability is some unknown processing of the component Remote Assistance. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. As an impact it is known to affect confidentiality. The summary by CVE is:

Windows Remote Assistance Information Disclosure Vulnerability

The weakness was disclosed 07/13/2021 as confirmed security guidance (Website). The advisory is shared at portal.msrc.microsoft.com. This vulnerability is known as CVE-2021-34507 since 06/09/2021. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn’t need any form of authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 07/17/2021).

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

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