An issue was discovered in Squid through 4.7. When handling the tag esi:when when ESI is enabled, Squid calls ESIExpression::Evaluate. This function uses a fixed stack buffer to hold the expression while it's being evaluated. When processing the expression, it could either evaluate the top of the stack, or add a new member to the stack. When adding a new member, there is no check to ensure that the stack won't overflow.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade libecapUpgrade libecap-devel | May 4, 2022 | Apr 15, 2020 |
| Alpine Linux | — | Upgrade squid | Jan 5, 2021 | Apr 15, 2020 |
| Amazon Linux Ami 2 | — | Upgrade squidUpgrade squid-sysvinitUpgrade squid-migration-scriptUpgrade squid-debuginfo | Jul 2, 2020 | Apr 15, 2020 |
| Amazon_linux | — | Upgrade squid | Jun 4, 2020 | Apr 15, 2020 |
| Centos_linux | — | Upgrade squid-migration-scriptUpgrade squidUpgrade squid-sysvinitUpgrade libecap-debuginfoUpgrade libecap-debugsourceUpgrade libecap-develUpgrade squid-debuginfoUpgrade libecapUpgrade squid-debugsource | May 7, 2020 | Apr 15, 2020 |
| Debian | — | Upgrade squid | May 11, 2020 | Apr 15, 2020 |
| Gentoo Linux | — | Upgrade net-proxy/squid. | Jun 15, 2020 | Apr 15, 2020 |
| Huawei Euleros 2_0_sp2 | — | Upgrade squidUpgrade squid-migration-script | Jun 17, 2020 | Apr 15, 2020 |
| Huawei Euleros 2_0_sp3 | — | Upgrade squidUpgrade squid-migration-script | Sep 28, 2020 | Apr 15, 2020 |
| Huawei Euleros 2_0_sp5 | — | Upgrade squid | Sep 3, 2020 | Apr 15, 2020 |
| Huawei Euleros 2_0_sp8 | — | Upgrade squid | Jul 31, 2020 | Apr 15, 2020 |
| Oracle Solaris | — | Upgrade web/proxy/squid to version 4.11-11.4.22.0.1.69.4 on Solaris 11.4 | Jan 19, 2021 | Apr 15, 2020 |
| Oracle_linux | — | Upgrade libecapUpgrade squidUpgrade libecap-develUpgrade squid-sysvinitUpgrade squid-migration-script | Oct 5, 2022 | Apr 24, 2020 |
| Redhat_linux | — | Upgrade squid-migration-scriptUpgrade squidUpgrade squid-debuginfoUpgrade libecap-debugsourceUpgrade libecap-debuginfoUpgrade squid-debugsourceUpgrade libecap-develUpgrade squid-sysvinitNo solution existsUpgrade libecap | May 7, 2020 | Apr 15, 2020 |
| Rocky_linux | — | Upgrade libecap-develUpgrade libecap-debugsourceUpgrade libecapUpgrade libecap-debuginfo | Mar 12, 2024 | Apr 15, 2020 |
| Suse | — | Upgrade squid3Upgrade squid | Apr 30, 2020 | Apr 15, 2020 |
| Ubuntu | — | Upgrade squid | Jun 24, 2020 | Apr 15, 2020 |
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