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CVE-2023-46724— SQUID-2023:4 Denial of Service in SSL Certificate validation

Quick assessment

Affected
squid-cache squid
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.

Squid是一套代理服务器和Web缓存服务器软件。该软件提供缓存万维网、过滤流量、代理上网等功能。 Squid 6.4之前版本存在安全漏洞，该漏洞源于指定索引错误验证不正确，容易受到针对SSL证书验证的拒绝服务攻击。

CVSS 8.6 · High EPSS 4.05% · P90

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2023-46724

Vulnerability Information
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Vulnerability Title
SQUID-2023:4 Denial of Service in SSL Certificate validation
Source: CVE Program / CVE List V5
Vulnerability Description
Squid is a caching proxy for the Web. Due to an Improper Validation of Specified Index bug, Squid versions 3.3.0.1 through 5.9 and 6.0 prior to 6.4 compiled using `--with-openssl` are vulnerable to a Denial of Service attack against SSL Certificate validation. This problem allows a remote server to perform Denial of Service against Squid Proxy by initiating a TLS Handshake with a specially crafted SSL Certificate in a server certificate chain. This attack is limited to HTTPS and SSL-Bump. This bug is fixed in Squid version 6.4. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives. Those who you use a prepackaged version of Squid should refer to the package vendor for availability information on updated packages.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Squid 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Squid是一套代理服务器和Web缓存服务器软件。该软件提供缓存万维网、过滤流量、代理上网等功能。 Squid 6.4之前版本存在安全漏洞，该漏洞源于指定索引错误验证不正确，容易受到针对SSL证书验证的拒绝服务攻击。
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)

Affected Products

Vendor Product Affected Versions CPE Subscribe
squid-cache squid >= 3.3.0.1, < 6.4 -

II. Public POCs for CVE-2023-46724

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 10002 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2023-46724

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Patches & Fixes for CVE-2023-46724 (1)

Vendor Advisories for CVE-2023-46724 (2)

Mailing List Discussions for CVE-2023-46724 (2)

Other References for CVE-2023-46724 (2)

IV. Related Vulnerabilities

Same product: squid
Same vendor: squid-cache
Same weakness: CWE-125

V. Comments for CVE-2023-46724

Anonymous User
2026-01-15 06:09:14

Zaproxy alias impedit expedita quisquam pariatur exercitationem. Nemo rerum eveniet dolores rem quia dignissimos.

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