Vulnerability · Published Oct 11, 2023 · Assigned by GitHub_M

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

Critical 9.1

In plain English

A critical-severity security flaw in naxsi from wargio. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 63% of all known vulnerabilities).

Severity (CVSS 3.1)9.1Critical

Exploit odds (30 days)1.0%top 37.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
wargio	naxsi	>= 1.3, < 1.6

Weakness: CWE-693 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

References

https://github.com/wargio/naxsi/security/advisories/GHSA-7qjc-q4j9-pc8x x_refsource_CONFIRM
https://github.com/wargio/naxsi/pull/103 x_refsource_MISC
https://github.com/wargio/naxsi/commit/1b712526ed3314dd6be7e8b0259eabda63c19537 x_refsource_MISC