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).
References
Link | Resource |
---|---|
https://bugsec.com/experts_teams/ | Third Party Advisory |
https://forums.plex.tv/t/security-regarding-cve-2021-42835/761510 | Vendor Advisory |
https://ir-on.io/2021/12/02/local-privilege-plexcalation/ | Exploit Third Party Advisory |
https://www.plex.tv/media-server-downloads/ | Product Vendor Advisory |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: mitre
Published: 2021-12-08T14:34:35
Updated: 2021-12-08T14:34:35
Reserved: 2021-10-22T00:00:00
Link: CVE-2021-42835
JSON object: View
NVD Information
Status : Analyzed
Published: 2021-12-08T15:15:10.180
Modified: 2021-12-13T17:14:44.227
Link: CVE-2021-42835
JSON object: View
Redhat Information
No data.
CWE