Vulnerability Monitor

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CVE-2021-39242

An issue was discovered in HAProxy 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3. It can lead to a situation with an attacker-controlled HTTP Host header, because a mismatch between Host and authority is mishandled.

Published

2021-08-17T19:15:08.320

Last Modified

2024-11-21T06:18:59.860

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-755
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application haproxy haproxy < 2.2.16 Yes
Application haproxy haproxy < 2.3.13 Yes
Application haproxy haproxy < 2.4.3 Yes
Operating System debian debian_linux 11.0 Yes
Operating System fedoraproject fedora 33 Yes
Operating System fedoraproject fedora 34 Yes
References