CVE-2021-39240 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 does not ensure that the scheme and path portions of a URI have the expected characters. For example the authority field (as observed on a target HTTP/2 server) might differ from what the routing rules were intended to achieve.

CVSS Vector

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

Reference

https://git.haproxy.org/?p=haproxy.git;a=commit;h=a495e0d94876c9d39763db319f609351907a31e8 https://git.haproxy.org/?p=haproxy.git;a=commit;h=4b8852c70d8c4b7e225e24eb58258a15eb54c26e https://www.mail-archive.com/haproxy@formilux.org/msg41041.html 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

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

7.5