by Kastro
Paper/Archive/CVE-2023-45132

CVE-2023-45132

wargio naxsi — IgnoreIP/IgnoreCIDR should not trust X-Forwarded-For

EPSS 1.0%CVSS 9.8
critical.is priorityof 100
42
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 62.4.624 × 2012.5No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
naxsi>= 1.3, < 1.6–CNA
naxsi1.3 – < 1.61.6CISA-ADP

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub_M (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: partial

References

refgithub.com/wargio/naxsi/security/advisories/GHSA-7qjc-q4j9-pc8xrefgithub.com/wargio/naxsi/pull/103refgithub.com/wargio/naxsi/commit/1b712526ed3314dd6be7e8b0259eabda63c19537