# CVE-2020-23574: Memory corruption in n/a

> An authenticated user can cause a denial of service in Sysax Multi Server by triggering a buffer overflow via a long filename during file upload.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Aug 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-4vv3-wjvp-xprx

## What is CVE-2020-23574?

CVE-2020-23574 is a medium-severity memory corruption vulnerability in n/a, published on 19 Aug 2020. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

When uploading a file in Sysax Multi Server 6.90, an authenticated user can modify the filename="" parameter in the uploadfile_name1.htm form to a length of 368 or more bytes. This will create a buffer overflow condition, causing the application to crash.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2020-23574?

It affects 1 product.


Products: Sysax Multi Server.

## How do I fix CVE-2020-23574?

No fix has been published for CVE-2020-23574 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-23574 being exploited?

There is no known exploitation of CVE-2020-23574 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2012-10060](https://insights.sbomify.com/CVE-2012-10060/): Sysax Multi Server < 5.55 SSH Username Buffer Overflow (critical 9.3)
- [CVE-2009-4790](https://insights.sbomify.com/CVE-2009-4790/): Path traversal in n/a (critical 9.0)
- [CVE-2020-13229](https://insights.sbomify.com/CVE-2020-13229/): Auth bypass in n/a (high 8.8)
- [CVE-2013-10065](https://insights.sbomify.com/CVE-2013-10065/): Sysax Multi-Server <= 6.10 SSHD Key Exchange DoS (high 8.7)
- [CVE-2024-53458](https://insights.sbomify.com/CVE-2024-53458/): Denial of service in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-23574 and fix it if it is affected.

What it is: CVE-2020-23574 is a medium-severity memory corruption vulnerability in n/a, published on 19 Aug 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-23574 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-2020-23574/ (Markdown: https://insights.sbomify.com/CVE-2020-23574/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-23574
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-23574
- OSV: https://osv.dev/vulnerability/CVE-2020-23574

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-23574/
Summaries are generated and may contain mistakes; the official description above is the record.