CVE-2021-39242 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Reference

https://www.mail-archive.com/haproxy@formilux.org/msg41041.html https://git.haproxy.org/?p=haproxy.git;a=commit;h=b5d2b9e154d78e4075db163826c5e0f6d31b2ab1 https://www.debian.org/security/2021/dsa-4960 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4ALECUZDIMT5FYGP6V6PVSI4BKVZTZWN/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RPNY4WZIQUAUOCLIMUPC37AQWNXTWIQM/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

7.5