CVEvulnerability

CVE-2021-40346

7.5 HIGH Published 2021-09-08 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-09-08
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 2.0 ([email protected])
5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:P/A:N
Weaknesses
CWE-190

Description

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.

Affected configurations

• haproxy haproxy (>= 2.0.0 < 2.0.25) • haproxy haproxy (>= 2.2.0 < 2.2.17) • haproxy haproxy (>= 2.3.0 < 2.3.14) • haproxy haproxy (>= 2.4.0 < 2.4.4) • haproxy haproxy 2.5 • debian debian linux 11.0 • fedoraproject fedora 33 • fedoraproject fedora 34

Related

Weakness · CWE (1)

  • CWE-190 Integer Overflow or Wraparound weakness

References