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CVE-2021-42835

Quick assessment

Affected
n/a n/a
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PLEX Plex Media Server是瑞士Plex（PLEX）公司的一套媒体播放器及媒体服务器软件。 Plex Media Server 中存在访问控制错误漏洞，该漏洞源于产品更新服务组件中的RPC服务未对用户身份进行有效验证。攻击者可通过该漏洞执行恶意代码。以下产品及版本受到影响：Plex Media Server 1.24.4.5081-e362dc1ee 版本。

AI Predicted 8.8 Difficulty: Moderate EPSS 1.18% · P66
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I. Basic Information for CVE-2021-42835

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
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).
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
PLEX Plex Media Server 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PLEX Plex Media Server是瑞士Plex（PLEX）公司的一套媒体播放器及媒体服务器软件。 Plex Media Server 中存在访问控制错误漏洞，该漏洞源于产品更新服务组件中的RPC服务未对用户身份进行有效验证。攻击者可通过该漏洞执行恶意代码。以下产品及版本受到影响：Plex Media Server 1.24.4.5081-e362dc1ee 版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- n/a n/a -

II. Public POCs for CVE-2021-42835

# POC Description Source Link Shenlong Link
1 Plex media server local privilige escalation poc - CVE-2021-42835 https://github.com/netanelc305/PlEXcalaison POC Details
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III. Intelligence Information for CVE-2021-42835

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Other References for CVE-2021-42835 (3)

Same Patch Batch · n/a · 2021-12-08 · 21 CVEs total

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CVE-2021-43978 7.1 HIGH Allegro Windows 安全漏洞
CVE-2021-42110 7.1 HIGH Allegro Windows 输入验证错误漏洞
CVE-2021-40861 Genesys Intelligent Workload Distribution SQL注入漏洞
CVE-2021-44529 Ivanti Endpoint Manager 代码注入漏洞
CVE-2021-3370 DouCo DouPHP 跨站脚本漏洞
CVE-2020-22421 迅易科技 74cms 跨站脚本漏洞
CVE-2018-25020 Linux kernel 安全漏洞
CVE-2021-44556 National Library Of The Netherlands / Research Digger 代码问题漏洞
CVE-2021-44557 MultiNer代码问题漏洞
CVE-2021-40860 Genesys Intelligent Workload Distribution SQL注入漏洞
CVE-2021-21957 Dream Report ODS Remote Connector 安全漏洞
CVE-2021-41450 Tp-link TP-Link AX10 环境问题漏洞
CVE-2021-41063 Aanderaa GeoView SQL注入漏洞
CVE-2021-43399 yubihsm-shell 缓冲区错误漏洞
CVE-2020-27416 Maharashtra State Electricity Distribution Mahavitaran 代码问题漏洞
CVE-2021-4048 Lapack 缓冲区错误漏洞
CVE-2021-21951 Eufy Anker Eufy Homebase 缓冲区错误漏洞
CVE-2021-21950 Eufy Anker Eufy Homebase 缓冲区错误漏洞

IV. Related Vulnerabilities

Same product: n/a
Same vendor: n/a

V. Comments for CVE-2021-42835

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