# CVE-2021-35233: HTTP TRACK & TRACE Methods Enabled

> Attackers can exploit enabled HTTP TRACK and TRACE methods to disclose sensitive information, such as authentication headers, from the Kiwi Syslog Server.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 27 Oct 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-rqwr-hf3j-vwq9

## What is CVE-2021-35233?

CVE-2021-35233 is a medium-severity vulnerability in SolarWinds Kiwi Syslog Server, published on 27 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The HTTP TRACK & TRACE methods were enabled in Kiwi Syslog Server 9.7.1 and earlier. These methods are intended for diagnostic purposes only. If enabled, the web server will respond to requests that use these methods by returning exact HTTP request that was received in the response to the client. This may lead to the disclosure of sensitive information such as internal authentication headers appended by reverse proxies.

Weakness: CWE-16

## Which versions are affected by CVE-2021-35233?

It affects 1 product.


Products: Solarwinds Kiwi Syslog Server.

## How do I fix CVE-2021-35233?

No fix has been published for CVE-2021-35233 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-35233 being exploited?

There is no known exploitation of CVE-2021-35233 in the wild and no public exploit code.

## Other vulnerabilities in SolarWinds Kiwi Syslog Server

- [CVE-2021-35231](https://insights.sbomify.com/CVE-2021-35231/): Unquoted Path (SMB Login) Vulnerability (medium 6.7)
- [CVE-2021-35235](https://insights.sbomify.com/CVE-2021-35235/): ASP.NET Debug Feature Enabled (medium 5.3)
- [CVE-2021-35237](https://insights.sbomify.com/CVE-2021-35237/): Clickjacking Vulnerability (medium 5.0)
- [CVE-2021-35236](https://insights.sbomify.com/CVE-2021-35236/): Missing Secure Flag From SSL Cookie (low 3.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-35233 and fix it if it is affected.

What it is: CVE-2021-35233 is a medium-severity vulnerability in SolarWinds Kiwi Syslog Server, published on 27 Oct 2021. 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-2021-35233 in the wild and no public exploit code.

Affected product: SolarWinds Kiwi Syslog Server. 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-2021-35233/ (Markdown: https://insights.sbomify.com/CVE-2021-35233/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-35233
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-35233
- OSV: https://osv.dev/vulnerability/CVE-2021-35233

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-35233/
Summaries are generated and may contain mistakes; the official description above is the record.