CVE-2021-39242 – haproxy: it can lead to a situation with an attacker-controlled HTTP Host header because a mismatch between Host and authority is mishandled

https://notcve.org/view.php?id=CVE-2021-39242

17 Aug 2021 — An issue was discovered in HAProxy 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3. It can lead to a situation with an attacker-controlled HTTP Host header, because a mismatch between Host and authority is mishandled. Se ha detectado un problema en HAProxy versiones 2.2 anteriores a 2.2.16, versiones 2.3 anteriores a 2.3.13 y versiones 2.4 anteriores a 2.4.3. Puede conllevar a una situación con un encabezado HTTP Host controlada por un atacante, porque es manejado inapropiadamente un desajuste en... • https://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=b5d2b9e154d78e4075db163826c5e0f6d31b2ab1 • CWE-20: Improper Input Validation CWE-755: Improper Handling of Exceptional Conditions •