Request Smuggling Vulnerability in HAProxy by HAProxy Technologies
CVE-2023-25725

9.1CRITICAL

Key Information:

Vendor

Haproxy

Status
Haproxy
Vendor
CVE Published:
14 February 2023

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 17%

What is CVE-2023-25725?

HAProxy versions prior to 2.7.3 contain a vulnerability that may allow an attacker to bypass access controls via improper parsing of HTTP/1 headers, resulting in potential request smuggling. This occurs when certain empty header field names are accepted, leading to truncation of the header list. While the impact is limited for HTTP/2 and HTTP/3 due to the timing of header processing, users operating with HTTP/1.x could face increased risks. Users are advised to upgrade to fixed versions to mitigate these risks.

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

LAB-CVE-2023-25725
Created by sgwgsw

References

https://www.haproxy.org/
https://git.haproxy.org/?p=haproxy-2.7.git%3Ba=commit%3Bh...
https://lists.debian.org/debian-lts-announce/2023/02/msg0...
mailing-list

EPSS Score

17% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
9.1
Severity:
CRITICAL
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.