An issue was discovered in Squid 3.x and 4.x through 4.8. It allows attackers to smuggle HTTP requests through frontend software to a Squid instance that splits the HTTP Request pipeline differently. The resulting Response messages corrupt caches (between a client and Squid) with attacker-controlled content at arbitrary URLs. Effects are isolated to software between the attacker client and Squid. There are no effects on Squid itself, nor on any upstream servers. The issue is related to a request header containing whitespace between a header name and a colon.
CVSS Details
- CVSS 3.1 Base Score: 5.3
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | alma-upgrade-libecapalma-upgrade-libecap-devel | May 4, 2022 | Nov 26, 2019 | |
| Alpine Linux | — | alpine-linux-upgrade-squid | Jan 19, 2021 | Nov 26, 2019 |
| Amazon Linux Ami 2 | amazon-linux-ami-2-upgrade-squidamazon-linux-ami-2-upgrade-squid-debuginfoamazon-linux-ami-2-upgrade-squid-migration-scriptamazon-linux-ami-2-upgrade-squid-sysvinit | Sep 28, 2023 | Nov 26, 2019 | |
| Arch Linux | arch-linux-upgrade-latest | Jul 11, 2025 | Nov 26, 2019 | |
| Centos_linux | — | centos-upgrade-libecapcentos-upgrade-libecap-debuginfocentos-upgrade-libecap-debugsourcecentos-upgrade-libecap-develcentos-upgrade-squidcentos-upgrade-squid-debuginfocentos-upgrade-squid-debugsource | Nov 5, 2020 | Nov 26, 2019 |
| Debian | debian-upgrade-squid | Dec 12, 2019 | Nov 26, 2019 | |
| Gentoo Linux | gentoo-linux-upgrade-net-proxy-squid | Mar 17, 2020 | Nov 26, 2019 | |
| Huawei Euleros 2_0_sp5 | huawei-euleros-2_0_sp5-upgrade-squid | Feb 24, 2020 | Nov 26, 2019 | |
| Huawei Euleros 2_0_sp8 | huawei-euleros-2_0_sp8-upgrade-squid | Jan 3, 2020 | Nov 26, 2019 | |
| Oracle Solaris | oracle-solaris-11-4-upgrade-web-proxy-squid-4-10-11-4-21-0-1-69-0 | Jan 19, 2021 | Nov 26, 2019 | |
| Oracle_linux | — | oracle-linux-upgrade-libecaporacle-linux-upgrade-libecap-develoracle-linux-upgrade-squid | Jul 22, 2024 | Nov 5, 2019 |
| Redhat_linux | no-fix-redhat-rpm-packageredhat-upgrade-libecapredhat-upgrade-libecap-debuginforedhat-upgrade-libecap-debugsourceredhat-upgrade-libecap-develredhat-upgrade-squidredhat-upgrade-squid-debuginforedhat-upgrade-squid-debugsource | Nov 5, 2020 | Nov 26, 2019 | |
| Rocky_linux | rocky-upgrade-libecaprocky-upgrade-libecap-debuginforocky-upgrade-libecap-debugsourcerocky-upgrade-libecap-devel | Mar 12, 2024 | Nov 26, 2019 | |
| Suse | — | suse-upgrade-squidsuse-upgrade-squid3 | Nov 22, 2019 | Nov 14, 2019 |
| Ubuntu | ubuntu-upgrade-squidubuntu-upgrade-squid3 | Dec 5, 2019 | Nov 14, 2019 |
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