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CVE-2025-54574

Good to know:

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Date: August 1, 2025

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.

Severity Score

Related Resources (6)

https://github.com/squid-cache/squid/security/advisories/GHSA-w4gv-vw3f-29g3
https://nvd.nist.gov/vuln/detail/CVE-2025-54574
https://security-tracker.debian.org/tracker/CVE-2025-54574
https://github.com/squid-cache/squid/releases/tag/SQUID_6_4
https://github.com/squid-cache/squid/commit/a27bf4b84da23594150c7a86a23435df0b35b988
https://www.mend.io/vulnerability-database/CVE-2025-54574

Severity Score

Weakness Type (CWE)

Out-of-bounds Write

CWE-787

Heap-based Buffer Overflow

CWE-122

Top Fix

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Upgrade Version

Upgrade to version https://github.com/squid-cache/squid.git - SQUID_6_4

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): CHANGED
Confidentiality (C): NONE
Integrity (I): LOW
Availability (A): HIGH

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