CVE-2023-45132

IgnoreIP/IgnoreCIDR should not trust X-Forwarded-For

CVSS 9.1 CRITICALEPSS 0.8%CWE-693

Vexday Risk Score

28Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 9.1EPSS 0.8%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

11 Oct 2023Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

wargio · naxsi

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References

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