CVE-2023-25725

HAProxy before 2.7.3 may allow a bypass of access control because HTTP/1 headers are inadvertently lost in some situations, aka "request smuggling." The HTTP header parsers in HAProxy may accept empty header field names, which could be used to truncate the list of HTTP headers and thus make some headers disappear after being parsed and processed for HTTP/1.0 and HTTP/1.1. For HTTP/2 and HTTP/3, the impact is limited because the headers disappear before being parsed and processed, as if they had not been sent by the client. The fixed versions are 2.7.3, 2.6.9, 2.5.12, 2.4.22, 2.2.29, and 2.0.31.

Affected products

Alt Linux, Almalinux, Astra Linux, Haproxy, Linuxmint, Red Hat, Red Os, Suse

Haproxy

< 2.0.31, 2.2.29, 2.4.22, 2.5.12, 2.6.9, 2.7.3

Fix

Available

CVSS 3.1

9.1 CRITICAL

EPSS

5.5% (92th percentile)

Weakness

CWE-444

NVD status

Modified

Published

2023-02-14