CVE Vulnerability

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).

6.9 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 3.4 / Impact : 10

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

Scope

7 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 1 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://forums.plex.tv/t/security-regarding-cve-2021-42835/761510 Vendor Advisory
https://bugsec.com/experts_teams/ Third Party 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
Information

Published : 2021-12-08 03:15

Updated : 2021-12-13 05:14

NVD link : CVE-2021-42835

Mitre link : CVE-2021-42835

Products Affected
No products.
CWE
CWE-367