CVE-2021-42835

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).

CVSS v3.1

7.0 HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0

6.9 MEDIUMAV:L/AC:M/Au:N/C:C/I:C/A:C

EPSS

1.18% chance of exploitation in the next 30 days, 65th percentile

Published

2021-12-08

Updated

2024-08-04

Proof-of-concept exploits (1)

• netanelc305/PlEXcalaison6★ · 2021-12-22

References

• CVE Record
• NVD entry

Related

• CVE-2021-42794
• CVE-2021-42840
• CVE-2021-4279
• CVE-2021-42847
• CVE-2021-42777
• CVE-2021-42859