CVE-2021-40346

Severity CVSS v4.0:

Pending analysis

Type:

CWE-190 Integer Overflow or Wraparound

Publication date:

08/09/2021

Last modified:

07/11/2023

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.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): High
Availability (A): None

Base Score 3.x

7.50

Severity 3.x

HIGH

Vector 2.0

AV:N/AC:L/Au:N/C:N/I:P/A:N CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): Physical
Availability (A): None

Base Score 2.0

5.00

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:haproxy:haproxy::::::::	2.0.0 (including)	2.0.25 (excluding)
cpe:2.3:a:haproxy:haproxy::::::::	2.2.0 (including)	2.2.17 (excluding)
cpe:2.3:a:haproxy:haproxy::::::::	2.3.0 (including)	2.3.14 (excluding)
cpe:2.3:a:haproxy:haproxy::::::::	2.4.0 (including)	2.4.4 (excluding)
cpe:2.3:a:haproxy:haproxy:2.5:dev0::::::
cpe:2.3:a:haproxy:haproxy:2.5:dev1::::::
cpe:2.3:a:haproxy:haproxy:2.5:dev2::::::
cpe:2.3:a:haproxy:haproxy:2.5:dev3::::::
cpe:2.3:a:haproxy:haproxy:2.5:dev4::::::
cpe:2.3:a:haproxy:haproxy:2.5:dev5::::::
cpe:2.3:a:haproxy:haproxy:2.5:dev6::::::
cpe:2.3:o:debian:debian_linux:11.0:::::::*
cpe:2.3:o:fedoraproject:fedora:33:::::::*
cpe:2.3:o:fedoraproject:fedora:34:::::::*

To consult the complete list of CPE names with products and versions, see this page

CPE	From	Up to
cpe:2.3:a:haproxy:haproxy::::::::	2.0.0 (including)	2.0.25 (excluding)
cpe:2.3:a:haproxy:haproxy::::::::	2.2.0 (including)	2.2.17 (excluding)
cpe:2.3:a:haproxy:haproxy::::::::	2.3.0 (including)	2.3.14 (excluding)
cpe:2.3:a:haproxy:haproxy::::::::	2.4.0 (including)	2.4.4 (excluding)
cpe:2.3:a:haproxy:haproxy:2.5:dev0::::::
cpe:2.3:a:haproxy:haproxy:2.5:dev1::::::
cpe:2.3:a:haproxy:haproxy:2.5:dev2::::::
cpe:2.3:a:haproxy:haproxy:2.5:dev3::::::
cpe:2.3:a:haproxy:haproxy:2.5:dev4::::::
cpe:2.3:a:haproxy:haproxy:2.5:dev5::::::
cpe:2.3:a:haproxy:haproxy:2.5:dev6::::::
cpe:2.3:o:debian:debian_linux:11.0:::::::*
cpe:2.3:o:fedoraproject:fedora:33:::::::*
cpe:2.3:o:fedoraproject:fedora:34:::::::*

CVE-2021-40346

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools