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.
CVSS Details
- CVSS 3.1 Base Score: 9.3
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade squid-debugsourceUpgrade squid-debuginfoUpgrade squid | Sep 9, 2025 | Aug 1, 2025 |
| Debian | — | Upgrade squid | Aug 4, 2025 | Aug 4, 2025 |
| Oracle_linux | — | Upgrade squid-sysvinitUpgrade squidUpgrade squid-migration-script | Sep 30, 2025 | Aug 1, 2025 |
| Redhat_linux | — | Upgrade libecap-debugsourceUpgrade squid-debugsourceNo solution existsUpgrade squid-debuginfoUpgrade squidUpgrade libecap-develUpgrade libecap-debuginfoUpgrade squid-migration-scriptUpgrade libecapUpgrade squid-sysvinit | Aug 4, 2025 | Aug 1, 2025 |
| Rocky_linux | — | Upgrade libecap-debuginfoUpgrade libecap-debugsourceUpgrade libecapUpgrade libecap-devel | Mar 20, 2026 | Dec 6, 2023 |
| Ubuntu | — | Upgrade squid | Aug 7, 2025 | Aug 1, 2025 |
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