CVE-2021-42835
High
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).
SeverityHigh
CVSS7.0
Exploit probability—
Product
Plex Media Server
PublishedDec 8, 2021
First seenDec 8, 2021
How to fix
Update
- plex media_server1.25.0.5282 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| plex media_server | v < 1.25.0.5282 | 1.25.0.5282 |
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