CVE-2021-42835

Published: Dic 08, 2021 Last Modified: Nov 21, 2024
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 7,0
Source: [email protected]
Attack Vector: local
Attack Complexity: high
Privileges Required: low
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
MEDIUM 6,9
Source: [email protected]
Access Vector: local
Access Complexity: medium
Authentication: none
Confidentiality: complete
Integrity: complete
Availability: complete

Description

AI Translation Available

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).

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,1506
Percentile
0,9th
Updated

EPSS Score Trend (Last 91 Days)

367

Time-of-check Time-of-use (TOCTOU) Race Condition

Incomplete
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Integrity Other Non-Repudiation
Potential Impacts:
Alter Execution Logic Unexpected State Modify Application Data Modify Files Or Directories Modify Memory Other Hide Activities
Applicable Platforms
All platforms may be affected
Likelihood of Exploit: Medium
View CWE Details
Application

Media Server by Plex

Product Information
Vendor Plex
Product Media Server
Version Range Affected
To 1.25.0.5282 (exclusive)
cpe:2.3:a:plex:media_server:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://bugsec.com/experts_teams/
Third Party Advisory
https://bugsec.com/experts_teams/
https://forums.plex.tv/t/security-regarding-cve-2021-42835/…
Vendor Advisory
https://forums.plex.tv/t/security-regarding-cve-2021-42835/761510
https://ir-on.io/2021/12/02/local-privilege-plexcalation/
Exploit Third Party Advisory
https://ir-on.io/2021/12/02/local-privilege-plexcalation/
https://www.plex.tv/media-server-downloads/
Product Vendor Advisory
https://www.plex.tv/media-server-downloads/
https://bugsec.com/experts_teams/
Third Party Advisory
https://bugsec.com/experts_teams/
https://forums.plex.tv/t/security-regarding-cve-2021-42835/…
Vendor Advisory
https://forums.plex.tv/t/security-regarding-cve-2021-42835/761510
https://ir-on.io/2021/12/02/local-privilege-plexcalation/
Exploit Third Party Advisory
https://ir-on.io/2021/12/02/local-privilege-plexcalation/
https://www.plex.tv/media-server-downloads/
Product Vendor Advisory
https://www.plex.tv/media-server-downloads/