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An issue was discovered in Squid before 4.12 and 5.x before 5.0.3. Due to use of a potentially dangerous function, Squid and the default certificate validation helper are vulnerable to a Denial of Service when opening a TLS connection to an attacker-controlled server for HTTPS. This occurs because unrecognized error values are mapped to NULL, but later code expects that each error value is mapped to a valid error string.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade libecapUpgrade libecap-devel | May 4, 2022 | Jun 30, 2020 |
| Amazon Linux Ami 2 | — | Upgrade squid-debuginfoUpgrade squid-sysvinitUpgrade squid-migration-scriptUpgrade squid | Jun 6, 2023 | Jun 30, 2020 |
| Amazon_linux | — | Upgrade squid | Jun 7, 2023 | Jun 30, 2020 |
| Centos_linux | — | Upgrade squidUpgrade libecapUpgrade libecap-debugsourceUpgrade squid-debugsourceUpgrade squid-debuginfoUpgrade libecap-debuginfoUpgrade libecap-devel | Nov 5, 2020 | Jun 30, 2020 |
| Debian | — | Upgrade squid | Jul 30, 2024 | Jun 30, 2020 |
| Huawei Euleros 2_0_sp2 | — | Upgrade squidUpgrade squid-migration-script | Sep 16, 2021 | Jun 30, 2020 |
| Huawei Euleros 2_0_sp3 | — | Upgrade squid-migration-scriptUpgrade squid | Apr 30, 2021 | Jun 30, 2020 |
| Huawei Euleros 2_0_sp5 | — | Upgrade squid | Nov 2, 2020 | Jun 30, 2020 |
| Huawei Euleros 2_0_sp8 | — | Upgrade squid | Feb 2, 2021 | Jun 30, 2020 |
| Oracle_linux | — | Upgrade libecap-develUpgrade squidUpgrade libecap | Jul 22, 2024 | Jun 19, 2020 |
| Redhat_linux | — | Upgrade libecapUpgrade libecap-develUpgrade squidUpgrade libecap-debuginfoUpgrade libecap-debugsourceUpgrade squid-debuginfoUpgrade squid-debugsourceNo solution exists | Nov 5, 2020 | Jun 30, 2020 |
| Rocky_linux | — | Upgrade libecapUpgrade libecap-debuginfoUpgrade libecap-debugsourceUpgrade libecap-devel | Mar 12, 2024 | Jun 30, 2020 |
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