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CVE-2023-49285— Denial of Service in HTTP Message Processing in Squid

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存在安全漏洞，该漏洞源于缓冲区溢出错误，从而导致拒绝服务。

CVSS 8.6 · High EPSS 88.14% · P100

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2023-49285

Vulnerability Information
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Vulnerability Title
Denial of Service in HTTP Message Processing in Squid
Source: CVE Program / CVE List V5
Vulnerability Description
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a Buffer Overread bug Squid is vulnerable to a Denial of Service attack against Squid HTTP Message processing. This bug is fixed by Squid version 6.5. Users are advised to upgrade. There are no known workarounds for this vulnerability.
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
缓冲区上溢读取
Source: CVE Program / CVE List V5
Vulnerability Title
Squid 安全漏洞
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存在安全漏洞，该漏洞源于缓冲区溢出错误，从而导致拒绝服务。
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 >= 2.2, < 6.5 -

II. Public POCs for CVE-2023-49285

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 7055 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-2023-49285

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Patches & Fixes for CVE-2023-49285 (2)

Vendor Advisories for CVE-2023-49285 (2)

Mailing List Discussions for CVE-2023-49285 (2)

Other References for CVE-2023-49285 (2)

Same Patch Batch · squid-cache · 2023-12-04 · 3 CVEs total

CVE-2023-49286 8.6 HIGH Denial of Service in Helper Process management
CVE-2023-49288 8.6 HIGH Denial of Service in HTTP Collapsed Forwarding in Squid

IV. Related Vulnerabilities

Same product: squid
Same vendor: squid-cache
Same weakness: CWE-126

V. Comments for CVE-2023-49285

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