#VU79767 Inconsistent interpretation of HTTP requests in HAProxy - CVE-2023-40225
Published: August 21, 2023
Vulnerability identifier: #VU79767
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2023-40225
CWE-ID: CWE-444
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
HAProxy
HAProxy
Software vendor:
HAProxy
HAProxy
Description
The vulnerability allows a remote attacker to perform HTTP request smuggling attacks.
The vulnerability exists due to improper validation of HTTP requests. A remote attacker can send a specially crafted HTTP request with empty Content-Length headers to the server and smuggle arbitrary HTTP headers.
Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.
Remediation
Install updates from vendor's website.
External links
- https://www.haproxy.org/download/2.8/src/CHANGELOG
- https://www.haproxy.org/download/2.6/src/CHANGELOG
- https://cwe.mitre.org/data/definitions/436.html
- https://github.com/haproxy/haproxy/issues/2237
- https://www.haproxy.org/download/2.7/src/CHANGELOG
- https://github.com/haproxy/haproxy/commit/6492f1f29d738457ea9f382aca54537f35f9d856