An integer overflow exists in HAProxy 2.0 through 2.5 in htx_add_header that can be exploited to perform an HTTP request smuggling attack, allowing an attacker to bypass all configured http-request HAProxy ACLs and possibly other ACLs.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade haproxy2Upgrade haproxy2-debuginfo | Sep 28, 2023 | Sep 8, 2021 |
| Debian | — | Upgrade haproxy | Nov 4, 2022 | Sep 8, 2021 |
| Huawei Euleros 2_0_sp10 | — | Upgrade haproxy | Feb 28, 2022 | Sep 8, 2021 |
| Huawei Euleros 2_0_sp9 | — | Upgrade haproxy | Jan 4, 2022 | Sep 8, 2021 |
| Redhat Openshift | — | Upgrade haproxy | Nov 12, 2021 | Sep 8, 2021 |
| Suse | — | Upgrade haproxy | Sep 8, 2021 | Sep 7, 2021 |
| Ubuntu | — | Upgrade haproxy | Sep 9, 2021 | Sep 8, 2021 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Sep 8, 2021 |
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