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 squidUpgrade squid-debugsourceUpgrade squid-debuginfo | Sep 9, 2025 | Aug 1, 2025 |
| Debian | — | Upgrade squid | Aug 4, 2025 | Aug 4, 2025 |
| Oracle_linux | — | Upgrade squid-migration-scriptUpgrade squidUpgrade squid-sysvinit | Sep 30, 2025 | Aug 1, 2025 |
| Redhat_linux | — | Upgrade squidUpgrade squid-migration-scriptUpgrade squid-sysvinitUpgrade libecapUpgrade libecap-develUpgrade libecap-debugsourceUpgrade libecap-debuginfoNo solution existsUpgrade squid-debuginfoUpgrade squid-debugsource | Aug 4, 2025 | Aug 1, 2025 |
| Rocky_linux | — | Upgrade libecap-develUpgrade libecapUpgrade libecap-debugsourceUpgrade libecap-debuginfo | Mar 20, 2026 | Dec 6, 2023 |
| Ubuntu | — | Upgrade squid | Aug 7, 2025 | Aug 1, 2025 |
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