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

> Attackers can bypass the NAXSI web application firewall by spoofing the X-Forwarded-For header to match trusted IP rules.

- **Severity:** Critical 9.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Oct 2023
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-7qjc-q4j9-pc8x

## What is CVE-2023-45132?

CVE-2023-45132 is a critical vulnerability in wargio naxsi, published on 11 Oct 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### 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.

Weakness: CWE-693 (Protection Mechanism Failure)

## Which versions are affected by CVE-2023-45132?

It affects 1 product.


Products: Wargio Naxsi.

## How do I fix CVE-2023-45132?

No fix has been published for CVE-2023-45132 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-45132 being exploited?

There is no known exploitation of CVE-2023-45132 in the wild and no public exploit code.

## Other vulnerabilities in wargio naxsi

- [CVE-2012-3380](https://insights.sbomify.com/CVE-2012-3380/): Path traversal in n/a (low 2.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-45132 and fix it if it is affected.

What it is: CVE-2023-45132 is a critical vulnerability in wargio naxsi, published on 11 Oct 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-45132 in the wild and no public exploit code.

Affected product: wargio naxsi. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-45132/ (Markdown: https://insights.sbomify.com/CVE-2023-45132/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-45132
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-45132
- OSV: https://osv.dev/vulnerability/CVE-2023-45132

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-45132/
Summaries are generated and may contain mistakes; the official description above is the record.