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CVE-2023-40225

Date: August 10, 2023

HAProxy through 2.0.32, 2.1.x and 2.2.x through 2.2.30, 2.3.x and 2.4.x through 2.4.23, 2.5.x and 2.6.x before 2.6.15, 2.7.x before 2.7.10, and 2.8.x before 2.8.2 forwards empty Content-Length headers, violating RFC 9110 section 8.6. In uncommon cases, an HTTP/1 server behind HAProxy may interpret the payload as an extra request.

Language: C

Severity Score

Related Resources (9)

https://github.com/haproxy/haproxy/commit/6492f1f29d738457ea9f382aca54537f35f9d856
https://security-tracker.debian.org/tracker/CVE-2023-40225
https://www.haproxy.org/download/2.8/src/CHANGELOG
https://nvd.nist.gov/vuln/detail/CVE-2023-40225
https://www.haproxy.org/download/2.7/src/CHANGELOG
https://cwe.mitre.org/data/definitions/436.html
https://github.com/haproxy/haproxy/issues/2237
https://www.haproxy.org/download/2.6/src/CHANGELOG
https://www.mend.io/vulnerability-database/CVE-2023-40225

Severity Score

Weakness Type (CWE)

Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

CWE-444

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): CHANGED
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): NONE

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