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CVE-2021-40516

Quick assessment

Affected
n/a n/a
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WeeChat是一款可扩展的即时聊天客户端应用程序。 WeeChat 存在安全漏洞，该漏洞源于 3.2.1 版本之前的 WeeChat 允许远程攻击者通过精心制作的 WebSocket 框架触发 Relay 插件中 plugins/relay/relay-websocket.c 中的越界读取，导致拒绝服务（崩溃）。

AI Predicted 7.5 Difficulty: Easy EPSS 1.59% · P75

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-40516

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
WeeChat before 3.2.1 allows remote attackers to cause a denial of service (crash) via a crafted WebSocket frame that trigger an out-of-bounds read in plugins/relay/relay-websocket.c in the Relay plugin.
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
WeeChat 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WeeChat是一款可扩展的即时聊天客户端应用程序。 WeeChat 存在安全漏洞，该漏洞源于 3.2.1 版本之前的 WeeChat 允许远程攻击者通过精心制作的 WebSocket 框架触发 Relay 插件中 plugins/relay/relay-websocket.c 中的越界读取，导致拒绝服务（崩溃）。
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-2021-40516

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III. Intelligence Information for CVE-2021-40516

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Patches & Fixes for CVE-2021-40516 (1)

Mailing List Discussions for CVE-2021-40516 (1)

Other References for CVE-2021-40516 (1)

Same Patch Batch · n/a · 2021-09-05 · 4 CVEs total

CVE-2021-23439 4.2 MEDIUM Cross-site Scripting (XSS)
CVE-2021-40523 Contiki 代码问题漏洞
CVE-2021-40524 Pure-FTPd 代码问题漏洞

IV. Related Vulnerabilities

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

V. Comments for CVE-2021-40516

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