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I. Basic Information for CVE-2025-54574
Vulnerability Information
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Vulnerability Title
Squid's URN Handling can lead to Buffer Overflow
Source: NVD (National Vulnerability Database)
Vulnerability Description
Squid is a caching proxy for the Web. In versions 6.3 and below, Squid is vulnerable to a heap buffer overflow and possible remote code execution attack when processing URN due to incorrect buffer management. This has been fixed in version 6.4. To work around this issue, disable URN access permissions.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
堆缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
Squid 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Squid是Squid开源的一套代理服务器和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 6.3及之前版本存在安全漏洞，该漏洞源于处理URN时存在堆缓冲区溢出，可能导致远程代码执行。
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
VendorProductAffected VersionsCPESubscribe
squid-cachesquid < 6.4 -
II. Public POCs for CVE-2025-54574
#POC DescriptionSource LinkShenlong Link
1CVE-2025-54574https://github.com/B1ack4sh/Blackash-CVE-2025-54574POC Details
2Vulnerability Found on Squid Proxy.https://github.com/starrynightsecurity/CVE-2025-54574-Squid-Heap-Buffer-OverflowPOC Details
3CVE-2025-54574https://github.com/Ashwesker/Blackash-CVE-2025-54574POC Details
4CVE-2025-54574https://github.com/Ashwesker/Ashwesker-CVE-2025-54574POC Details
5CVE-2025-54574https://github.com/gmh5225/Blackash-CVE-2025-54574POC Details
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III. Intelligence Information for CVE-2025-54574
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IV. Related Vulnerabilities
Same product: squid
Same vendor: squid-cache
Same weakness: CWE-122
V. Comments for CVE-2025-54574

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