# CVE-2017-5868: Other in n/a

> Remote attackers can inject HTTP headers via CRLF characters, enabling session fixation and response splitting in OpenVPN Access Server.

- **Severity:** Medium 6.1 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 25 May 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-c9j2-xr8m-5hh8

## What is CVE-2017-5868?

CVE-2017-5868 is a medium-severity vulnerability in n/a, published on 25 May 2017. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

CRLF injection vulnerability in the web interface in OpenVPN Access Server 2.1.4 allows remote attackers to inject arbitrary HTTP headers and consequently conduct session fixation attacks and possibly HTTP response splitting attacks via "%0A" characters in the PATH_INFO to __session_start__/.

Weakness: CWE-93 (Improper Neutralization of CRLF Sequences)

## Which versions are affected by CVE-2017-5868?

It affects 1 product.


Products: Openvpn Openvpn Access Server.

## How do I fix CVE-2017-5868?

No fix has been published for CVE-2017-5868 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-5868 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2017-5868 exists.

Public exploit code:

- OpenVPN Access Server 2.1.4 - CRLF Injection (nuclei): http/cves/2017/CVE-2017-5868.yaml

## Other vulnerabilities in n/a

- [CVE-2020-8953](https://insights.sbomify.com/CVE-2020-8953/): Auth bypass in n/a (critical 9.8)
- [CVE-2021-4234](https://insights.sbomify.com/CVE-2021-4234/): Denial of service in OpenVPN Access Server (high 7.5)
- [CVE-2022-33737](https://insights.sbomify.com/CVE-2022-33737/): Information disclosure in OpenVPN Access Server (high 7.5)
- [CVE-2022-33738](https://insights.sbomify.com/CVE-2022-33738/): Weak cryptography in OpenVPN Access Server (high 7.5)
- [CVE-2020-36382](https://insights.sbomify.com/CVE-2020-36382/): Denial of service in OpenVPN Access Server (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-5868 and fix it if it is affected.

What it is: CVE-2017-5868 is a medium-severity vulnerability in n/a, published on 25 May 2017. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2017-5868 exists.

Affected product: n/a. 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-2017-5868/ (Markdown: https://insights.sbomify.com/CVE-2017-5868/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-5868
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-5868
- OSV: https://osv.dev/vulnerability/CVE-2017-5868

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-5868/
Summaries are generated and may contain mistakes; the official description above is the record.