# CVE-2017-12632: Apache NiFi host header poisoning issue

> Attackers can force Apache NiFi to load resources from external servers via malicious host headers, potentially exposing internal data or bypassing security controls.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 23 Jan 2018
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-w4x6-j349-9r57

## What is CVE-2017-12632?

CVE-2017-12632 is a high-severity server-side request forgery vulnerability in Apache Nifi, published on 23 Jan 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A malicious host header in an incoming HTTP request could cause NiFi to load resources from an external server. The fix to sanitize host headers and compare to a controlled whitelist was applied on the Apache NiFi 1.5.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2017-12632?

2 open source packages ship an affected version, including org.apache.nifi:nifi. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `org.apache.nifi:nifi` | Maven | From 1.0.0 | 1.5.0 |
| `org.apache.nifi:nifi` | Maven | From 1.0.0 | 1.5.0 |

Products: Apache Nifi.

## How do I fix CVE-2017-12632?

Upgrade org.apache.nifi:nifi to 1.5.0 or later.

## Is CVE-2017-12632 being exploited?

There is no known exploitation of CVE-2017-12632 in the wild and no public exploit code.

## Other vulnerabilities in Apache Nifi

- [CVE-2018-1309](https://insights.sbomify.com/CVE-2018-1309/): Improper Restriction of XML External Entity Reference in Apache NiFi (critical 9.8)
- [CVE-2017-15697](https://insights.sbomify.com/CVE-2017-15697/): Apache NiFi XSS issue in context path handling (critical 9.8)
- [CVE-2017-5636](https://insights.sbomify.com/CVE-2017-5636/): Injection in Apache NiFi (critical 9.8)
- [CVE-2026-68981](https://insights.sbomify.com/CVE-2026-68981/): Apache NiFi: Uncontrolled Resource Consumption through Decompression of HTTP Requests (high 8.8)
- [CVE-2023-36542](https://insights.sbomify.com/CVE-2023-36542/): Apache NiFi: Potential Code Injection with Properties Referencing Remote Resources (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-12632 and fix it if it is affected.

What it is: CVE-2017-12632 is a high-severity server-side request forgery vulnerability in Apache Nifi, published on 23 Jan 2018. 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-2017-12632 in the wild and no public exploit code.

Affected packages and fixed versions:
- org.apache.nifi:nifi (Maven): affected from 1.0.0; fixed in 1.5.0
- org.apache.nifi:nifi (Maven): affected from 1.0.0; fixed in 1.5.0

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-2017-12632/ (Markdown: https://insights.sbomify.com/CVE-2017-12632/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-12632
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-12632
- OSV: https://osv.dev/vulnerability/CVE-2017-12632

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From sbomify Insights: https://insights.sbomify.com/CVE-2017-12632/
Summaries are generated and may contain mistakes; the official description above is the record.