CVE-2023-45132 CRITICAL

CVE-2023-45132: IgnoreIP/IgnoreCIDR should not trust X-Forwarded-For

Vendor Wargio
Product naxsi
Weakness CWE-693
Published October 11, 2023
Last update September 17, 2024
View on NVD All CVEs

CVSS base score

9.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

What the vulnerability does

01Description

NAXSI is an open-source maintenance web application firewall (WAF) for NGINX. An issue present starting in version 1.3 and prior to version 1.6 allows someone to bypass the WAF when a malicious `X-Forwarded-For` IP matches `IgnoreIP` `IgnoreCIDR` rules. This old code was arranged to allow older NGINX versions to also support `IgnoreIP` `IgnoreCIDR` when multiple reverse proxies were present. The issue is patched in version 1.6. As a workaround, do not set any `IgnoreIP` `IgnoreCIDR` for older versions.

Key dates

02Disclosure timeline

October 11, 2023 CVE published
September 17, 2024 Record updated