Wednesday, December 8, 2021

CVE-2021-42835

Description

An issue was discovered in Plex Media Server through 1.24.4.5081-e362dc1ee. An attacker (with a foothold in a endpoint via a low-privileged user account) can access the exposed RPC service of the update service component. This RPC functionality allows the attacker to interact with the RPC functionality and execute code from a path of his choice (local, or remote via SMB) because of a TOCTOU race condition. This code execution is in the context of the Plex update service (which runs as SYSTEM).

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References to Advisories, Solutions, and Tools

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Resourcehttps://bugsec.com/experts_teams/https://forums.plex.tv/t/security-regarding-cve-2021-42835/761510https://ir-on.io/2021/12/02/local-privilege-plexcalation/https://www.plex.tv/media-server-downloads/
 

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thank you Templateism for the design - You should have written the code a little more complicated - Nothing Encrypted anymore