Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2021-20235

Quick assessment

Affected
n/a zeromq
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ZeroMQ libzmq（0MQ）是一个轻量级分布式消息传递引擎核心库。 libzmq 存在安全漏洞，攻击者可利用该漏洞通过libzmq的ZMTP V1包触发缓冲区溢出，从而触发拒绝服务，并可能运行代码。

AI Predicted 8.6 Difficulty: Easy EPSS 43.86% · P99
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2021-20235

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
There's a flaw in the zeromq server in versions before 4.3.3 in src/decoder_allocators.hpp. The decoder static allocator could have its sized changed, but the buffer would remain the same as it is a static buffer. A remote, unauthenticated attacker who sends a crafted request to the zeromq server could trigger a buffer overflow WRITE of arbitrary data if CURVE/ZAP authentication is not enabled. The greatest impact of this flaw is to application availability, data integrity, and confidentiality.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
libzmq 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ZeroMQ libzmq（0MQ）是一个轻量级分布式消息传递引擎核心库。 libzmq 存在安全漏洞，攻击者可利用该漏洞通过libzmq的ZMTP V1包触发缓冲区溢出，从而触发拒绝服务，并可能运行代码。
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
- zeromq zeromq 4.3.3 -

II. Public POCs for CVE-2021-20235

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2021-20235

请登录查看更多情报信息。

Vendor Advisories for CVE-2021-20235 (2)

Same Patch Batch · n/a · 2021-04-01 · 48 CVEs total

CVE-2021-29932 Rust 资源管理错误漏洞
CVE-2021-29935 Rust 资源管理错误漏洞
CVE-2021-29937 Rust 安全漏洞
CVE-2021-29941 Rust 缓冲区错误漏洞
CVE-2021-29942 Rust 缓冲区错误漏洞
CVE-2021-20296 LIM OpenEXR 代码问题漏洞
CVE-2021-29421 jbarlow83 pikepdf 代码问题漏洞
CVE-2021-3447 红帽 Ansible 日志信息泄露漏洞
CVE-2021-29940 Rust 资源管理错误漏洞
CVE-2021-29933 Rust 资源管理错误漏洞
CVE-2021-29934 Rust 缓冲区错误漏洞
CVE-2021-29931 Rust 资源管理错误漏洞
CVE-2021-29930 Rust 缓冲区错误漏洞
CVE-2021-29929 Rust 资源管理错误漏洞
CVE-2021-29251 BTCPay Server 安全漏洞
CVE-2021-28918 Npm netmask 代码问题漏洞
CVE-2021-3393 PostgreSQL 安全漏洞
CVE-2021-20234 ZeroMQ 资源管理错误漏洞
CVE-2021-22876 Haxx libcurl 信息泄露漏洞
CVE-2021-22890 Haxx libcurl 安全漏洞

Showing top 20 of 48 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: zeromq
Same vendor: n/a
Same weakness: CWE-120

V. Comments for CVE-2021-20235

No comments yet

Leave a comment