# CVE-2017-5999: Weak cryptography in n/a

> sysPass uses non-standard Rijndael-256 instead of AES, potentially allowing attackers to compromise encrypted data.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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:** 6 Mar 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-v4m6-phwc-pmmj

## What is CVE-2017-5999?

CVE-2017-5999 is a high-severity vulnerability in n/a, published on 6 Mar 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in sysPass 2.x before 2.1, in which an algorithm was never sufficiently reviewed by cryptographers. The fact that inc/SP/Core/Crypt.class is using the MCRYPT_RIJNDAEL_256() function (the 256-bit block version of Rijndael, not AES) instead of MCRYPT_RIJNDAEL_128 (real AES) could help an attacker to create unknown havoc in the remote system.

Weakness: CWE-326 (Inadequate Encryption Strength)

## Which versions are affected by CVE-2017-5999?

It affects 1 product.


Products: Syspass Syspass.

## How do I fix CVE-2017-5999?

No fix has been published for CVE-2017-5999 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-5999 being exploited?

There is no known exploitation of CVE-2017-5999 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2025-25477](https://insights.sbomify.com/CVE-2025-25477/): Cross-site scripting in n/a (high 8.1)
- [CVE-2025-25478](https://insights.sbomify.com/CVE-2025-25478/): Path traversal in n/a (medium 6.5)
- [CVE-2024-42904](https://insights.sbomify.com/CVE-2024-42904/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2017-9306](https://insights.sbomify.com/CVE-2017-9306/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2025-25476](https://insights.sbomify.com/CVE-2025-25476/): Cross-site scripting in n/a (medium 5.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-5999 and fix it if it is affected.

What it is: CVE-2017-5999 is a high-severity vulnerability in n/a, published on 6 Mar 2017. 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-2017-5999 in the wild and no public exploit code.

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-2017-5999/ (Markdown: https://insights.sbomify.com/CVE-2017-5999/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-5999
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-5999
- OSV: https://osv.dev/vulnerability/CVE-2017-5999

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-5999/
Summaries are generated and may contain mistakes; the official description above is the record.