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 |
| 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 |
Configurations
Configuration 1 (hide)
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History
21 Nov 2024, 06:28
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://bugsec.com/experts_teams/ - Third Party Advisory | |
| References | () https://forums.plex.tv/t/security-regarding-cve-2021-42835/761510 - Vendor Advisory | |
| References | () https://ir-on.io/2021/12/02/local-privilege-plexcalation/ - Exploit, Third Party Advisory | |
| References | () https://www.plex.tv/media-server-downloads/ - Product, Vendor Advisory |
Information
Published : 2021-12-08 15:15
Updated : 2024-11-21 06:28
NVD link : CVE-2021-42835
Mitre link : CVE-2021-42835
CVE.ORG link : CVE-2021-42835
JSON object : View
Products Affected
plex
- media_server
microsoft
- windows
CWE
CWE-367
Time-of-check Time-of-use (TOCTOU) Race Condition