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CVE-2021-40346

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.

Haproxy HAProxy是法国HAProxy（Haproxy）公司的一款开源的TCP/HTTP负载均衡服务器。该服务器提供4层、7层代理，并能支持上万级别的连接，具有高效、稳定等特点。 HAProxy 存在输入验证错误漏洞，该漏洞源于 HAProxy 中的 htx_add_header() 和 htx_add_trailer() 函数中缺少标头名称长度检查可能会导致请求走私攻击或响应拆分攻击。

AI Predicted 7.5 Difficulty: Easy EPSS 57.93% · P99
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I. Basic Information for CVE-2021-40346

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An integer overflow exists in HAProxy 2.0 through 2.5 in htx_add_header that can be exploited to perform an HTTP request smuggling attack, allowing an attacker to bypass all configured http-request HAProxy ACLs and possibly other ACLs.
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
Haproxy HAProxy 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Haproxy HAProxy是法国HAProxy（Haproxy）公司的一款开源的TCP/HTTP负载均衡服务器。该服务器提供4层、7层代理，并能支持上万级别的连接，具有高效、稳定等特点。 HAProxy 存在输入验证错误漏洞，该漏洞源于 HAProxy 中的 htx_add_header() 和 htx_add_trailer() 函数中缺少标头名称长度检查可能会导致请求走私攻击或响应拆分攻击。
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)

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Affected Products

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

II. Public POCs for CVE-2021-40346

# POC Description Source Link Shenlong Link
1 CVE-2021-40346 PoC (HAProxy HTTP Smuggling) https://github.com/knqyf263/CVE-2021-40346 POC Details
2 CVE-2021-40346 integer overflow enables http smuggling https://github.com/donky16/CVE-2021-40346-POC POC Details
3 None https://github.com/alikarimi999/CVE-2021-40346 POC Details
4 HAProxy CVE-2021-40346 https://github.com/Vulnmachines/HAProxy_CVE-2021-40346 POC Details
5 CVE-2021-40346 - HaProxy HTTP request smuggling through integer overflow https://github.com/alexOarga/CVE-2021-40346 POC Details
6 HTTP Request Smuggling https://github.com/BoianEduard/CVE-2021-40346 POC Details
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III. Intelligence Information for CVE-2021-40346

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Patches & Fixes for CVE-2021-40346 (1)

Vendor Advisories for CVE-2021-40346 (1)

Mailing List Discussions for CVE-2021-40346 (6)

Security Blog Posts for CVE-2021-40346 (1)

Other References for CVE-2021-40346 (1)

Same Patch Batch · n/a · 2021-09-08 · 19 CVEs total

CVE-2021-23404 7.6 HIGH Cross-site Request Forgery (CSRF)
CVE-2021-31274 Librenms 跨站脚本漏洞
CVE-2021-40818 Glewlwyd SSO server 缓冲区错误漏洞
CVE-2021-40814 Prestashop SQL注入漏洞
CVE-2021-36440 ShowDoc 代码问题漏洞
CVE-2020-26772 PPGo_Job 操作系统命令注入漏洞
CVE-2020-19138 DotCMS 代码问题漏洞
CVE-2020-19137 Autumn 安全漏洞
CVE-2021-40797 OpenStack 安全漏洞
CVE-2021-40537 owncloud 代码问题漏洞
CVE-2021-21996 Saltstack SaltStack Salt 安全漏洞
CVE-2021-33982 Fish Hunt FL 代码问题漏洞
CVE-2021-33981 Fish Hunt FL 信息泄露漏洞
CVE-2021-21897 Ribbonsoft dxflib 数字错误漏洞
CVE-2021-22004 SaltStack Salt竞争条件问题漏洞
CVE-2021-36695 Deskpro 跨站脚本漏洞
CVE-2021-40377 Smartertools SmarterTools SmarterMail 跨站脚本漏洞
CVE-2021-40812 GD Graphics Library 缓冲区错误漏洞

IV. Related Vulnerabilities

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

V. Comments for CVE-2021-40346

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