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.
                
            Metrics
Affected Vendors & Products
References
        History
                    Thu, 20 Mar 2025 20:15:00 +0000
| Type | Values Removed | Values Added | 
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 MITRE
                        MITRE
                    Status: PUBLISHED
Assigner: mitre
Published: 2023-02-14T00:00:00.000Z
Updated: 2025-03-20T19:14:03.000Z
Reserved: 2023-02-13T00:00:00.000Z
Link: CVE-2023-25725
 Vulnrichment
                        Vulnrichment
                    Updated: 2024-08-02T11:32:11.848Z
 NVD
                        NVD
                    Status : Modified
Published: 2023-02-14T19:15:11.530
Modified: 2025-03-20T20:15:29.773
Link: CVE-2023-25725
 Redhat
                        Redhat