CVE-2023-40225

Summary

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.

Affected Software

Weaknesses

• n/a

ADP Enrichment

CVE Program Container

Additional References

• https://github.com/haproxy/haproxy/issues/2237
• https://github.com/haproxy/haproxy/commit/6492f1f29d738457ea9f382aca54537f35f9d856
• https://www.haproxy.org/download/2.8/src/CHANGELOG
• https://www.haproxy.org/download/2.7/src/CHANGELOG
• https://www.haproxy.org/download/2.6/src/CHANGELOG
• https://cwe.mitre.org/data/definitions/436.html

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: yes
  • Technical Impact: partial

References

• https://github.com/haproxy/haproxy/issues/2237
• https://github.com/haproxy/haproxy/commit/6492f1f29d738457ea9f382aca54537f35f9d856
• https://www.haproxy.org/download/2.8/src/CHANGELOG
• https://www.haproxy.org/download/2.7/src/CHANGELOG
• https://www.haproxy.org/download/2.6/src/CHANGELOG
• https://cwe.mitre.org/data/definitions/436.html

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