Vulnerability Monitor

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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.

Published

2023-02-14T19:15:11.530

Last Modified

2025-03-20T20:15:29.773

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 9.1 (CRITICAL)

Weaknesses
  • Type: Primary
    NVD-CWE-Other
  • Type: Secondary
    CWE-444
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application haproxy haproxy < 2.0.31 Yes
Application haproxy haproxy < 2.2.29 Yes
Application haproxy haproxy < 2.4.22 Yes
Application haproxy haproxy < 2.5.12 Yes
Application haproxy haproxy < 2.6.9 Yes
Application haproxy haproxy < 2.7.3 Yes
Operating System debian debian_linux 10.0 Yes
Operating System debian debian_linux 11.0 Yes
References