What is CVE-2021-42835?

CVE-2021-42835 is a vulnerability discovered in Plex Media Server through version 1.24.4.5081-e362dc1ee.

How does CVE-2021-42835 affect Plex Media Server?

CVE-2021-42835 allows an attacker with a low-privileged user account to access the exposed RPC service of the Plex Media Server update service component.

What can an attacker do with CVE-2021-42835?

With CVE-2021-42835, an attacker can interact with the RPC functionality of the Plex Media Server update service component.

What is the severity of CVE-2021-42835?

CVE-2021-42835 is classified as a high-severity vulnerability with a severity value of 7.

How do I fix CVE-2021-42835 in Plex Media Server?

To fix CVE-2021-42835, you should update Plex Media Server to version 1.25.0.5282 or newer.

Vulnerability/
CVE-2021-42835

high

CWE

367 362

8/12/2021

21/11/2024

CVE-2021-42835: Race Condition

First published: Wed Dec 08 2021(Updated: )

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).

Credit: cve@mitre.org cve@mitre.org

Affected Software	Affected Version	How to fix
Plex Media Server	<1.25.0.5282
Microsoft Windows
All of
Plex Media Server	<1.25.0.5282
Microsoft Windows

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Frequently Asked Questions

What is CVE-2021-42835?
CVE-2021-42835 is a vulnerability discovered in Plex Media Server through version 1.24.4.5081-e362dc1ee.
How does CVE-2021-42835 affect Plex Media Server?
CVE-2021-42835 allows an attacker with a low-privileged user account to access the exposed RPC service of the Plex Media Server update service component.
What can an attacker do with CVE-2021-42835?
With CVE-2021-42835, an attacker can interact with the RPC functionality of the Plex Media Server update service component.
What is the severity of CVE-2021-42835?
CVE-2021-42835 is classified as a high-severity vulnerability with a severity value of 7.
How do I fix CVE-2021-42835 in Plex Media Server?
To fix CVE-2021-42835, you should update Plex Media Server to version 1.25.0.5282 or newer.

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