# CVE-2021-36717: Synerion TimeNet version 9.21 - Directory Traversal

> Attackers can exploit a directory traversal flaw in the Name parameter to view restricted files on the host system.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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:** 7 Sep 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-rwww-93cx-4h2h

## What is CVE-2021-36717?

CVE-2021-36717 is a medium-severity path traversal vulnerability in Synerion TimeNet version, published on 7 Sep 2021. 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

Synerion TimeNet version 9.21 contains a directory traversal vulnerability where, on the "Name" parameter, the attacker can return to the root directory and open the host file. This might give the attacker the ability to view restricted files, which could provide the attacker with more information required to further compromise the system.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2021-36717?

It affects 1 product.


Products: Synerion Timenet.

## How do I fix CVE-2021-36717?

No fix has been published for CVE-2021-36717 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-36717 being exploited?

There is no known exploitation of CVE-2021-36717 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-36717 and fix it if it is affected.

What it is: CVE-2021-36717 is a medium-severity path traversal vulnerability in Synerion TimeNet version, published on 7 Sep 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-36717 in the wild and no public exploit code.

Affected product: Synerion TimeNet version. 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-2021-36717/ (Markdown: https://insights.sbomify.com/CVE-2021-36717/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-36717
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-36717
- OSV: https://osv.dev/vulnerability/CVE-2021-36717

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-36717/
Summaries are generated and may contain mistakes; the official description above is the record.