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A flaw was found in HAProxy before 2.0.6. In legacy mode, messages featuring a transfer-encoding header missing the "chunked" value were not being correctly rejected. The impact was limited but if combined with the "http-reuse always" setting, it could be used to help construct an HTTP request smuggling attack against a vulnerable component employing a lenient parser that would ignore the content-length header as soon as it saw a transfer-encoding one (even if not entirely valid according to the specification).
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Centos_linux | — | Upgrade haproxy-debuginfoUpgrade haproxyUpgrade haproxy-debugsource | Apr 29, 2020 | Oct 23, 2019 |
| Debian | — | Upgrade haproxy | Jun 1, 2022 | Oct 23, 2019 |
| Huawei Euleros 2_0_sp3 | — | Upgrade haproxy | Apr 30, 2021 | Oct 23, 2019 |
| Huawei Euleros 2_0_sp5 | — | Upgrade haproxy | Feb 24, 2020 | Oct 23, 2019 |
| Huawei Euleros 2_0_sp8 | — | Upgrade haproxy | Jul 31, 2020 | Oct 23, 2019 |
| Oracle_linux | — | Upgrade haproxy | Oct 5, 2022 | Sep 13, 2019 |
| Redhat Openshift | — | Upgrade haproxy | Apr 8, 2020 | Sep 13, 2019 |
| Redhat_linux | — | Upgrade haproxy-debugsourceUpgrade haproxy-debuginfoUpgrade haproxy | Apr 29, 2020 | Oct 23, 2019 |
| Suse | — | Upgrade haproxy | Dec 4, 2019 | Oct 23, 2019 |
| Ubuntu | — | Upgrade haproxy | Nov 6, 2019 | Oct 23, 2019 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Oct 23, 2019 |
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