Vulnerability Monitor

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CVE-2021-40346

An integer overflow exists in HAProxy 2.0 through 2.5 in htx_add_header that can be exploited to perform an HTTP request smuggling attack, allowing an attacker to bypass all configured http-request HAProxy ACLs and possibly other ACLs.

Published

2021-09-08T17:15:12.457

Last Modified

2024-11-21T06:23:54.997

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:P/A:N

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: PARTIAL
  • Availability Impact: NONE
Exploitability Score

10.0

Impact Score

2.9

Weaknesses
  • Type: Primary
    CWE-190
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application haproxy haproxy < 2.0.25 Yes
Application haproxy haproxy < 2.2.17 Yes
Application haproxy haproxy < 2.3.14 Yes
Application haproxy haproxy < 2.4.4 Yes
Application haproxy haproxy 2.5 Yes
Application haproxy haproxy 2.5 Yes
Application haproxy haproxy 2.5 Yes
Application haproxy haproxy 2.5 Yes
Application haproxy haproxy 2.5 Yes
Application haproxy haproxy 2.5 Yes
Application haproxy haproxy 2.5 Yes
Operating System debian debian_linux 11.0 Yes
Operating System fedoraproject fedora 33 Yes
Operating System fedoraproject fedora 34 Yes
References