PT-2022-6828 · Haproxy+6 · Haproxy+6

Published 2021-03-11 · Updated 2024-04-17 · CVE-2023-0836

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions HAProxy versions 2.1 through 2.7 before 2.7.1 HAProxy version 2.2 before 2.2.27 HAProxy version 2.3 HAProxy version 2.4 before 2.4.21 HAProxy version 2.5 before 2.5.11 HAProxy version 2.6 before 2.6.8

Description An information leak issue was discovered in HAProxy. The problem arises from 5 bytes left uninitialized in the connection buffer when encoding the FCGI BEGIN REQUEST record, potentially disclosing sensitive data to configured FastCGI backends in an unexpected manner. This issue is related to incomplete clearing of temporary or auxiliary resources, which could allow a remote attacker to access confidential data.

Recommendations For HAProxy version 2.1, update to a version after 2.7.1 to resolve the issue. For HAProxy version 2.2 before 2.2.27, update to version 2.2.27 or later. For HAProxy version 2.3, update to a version after 2.7.1. For HAProxy version 2.4 before 2.4.21, update to version 2.4.21 or later. For HAProxy version 2.5 before 2.5.11, update to version 2.5.11 or later. For HAProxy version 2.6 before 2.6.8, update to version 2.6.8 or later. For HAProxy version 2.7 before 2.7.1, update to version 2.7.1 or later.

Exploit

Fix

Information Disclosure

Weakness Enumeration

CWE-200

CWE-459

Related Identifiers

ALSA-2023:6496

ALT-PU-2021-1463

ALT-PU-2023-1508

ALT-PU-2023-1942

ALT-PU-2023-5064

ALT-PU-2023-5100

BDU:2023-04833

BIT-HAPROXY-2023-0836

CVE-2023-0836

DSA-5388-1

OESA-2023-1886

OESA-2023-1918

OESA-2023-1919

RHSA-2023:6496

RHSA-2023_6496

ROSA-SA-2024-2400

USN-5994-1

Affected Products

Alt Linux

Almalinux

Astra Linux

Haproxy

Linuxmint

Red Hat

Ubuntu

References · 40

• 🔥 https://github.com/knqyf263/CVE-2021-40346 · Exploit
• 🔥 https://github.com/donky16/CVE-2021-40346-POC · Exploit
• 🔥 https://github.com/alikarimi999/CVE-2021-40346 · Exploit
• 🔥 https://github.com/Vulnmachines/HAProxy_CVE-2021-40346 · Exploit
• https://ubuntu.com/security/CVE-2023-0836 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-0836 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-haproxy-2023-0836 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-5388-1 · Vendor Advisory
• https://debian.org/security/2023/dsa-5388 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2023-1919 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-0836 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-0836 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2023-1886 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-45539 · Security Note
• https://errata.almalinux.org/9/ALSA-2023-6496.html · Vendor Advisory