# CVE-2018-9853: Privilege escalation in n/a

> Attackers with unprivileged access can escalate privileges to the SSH server process level due to insecure access control.

- **Severity:** Critical 9.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Jul 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-36w9-v5c5-w4rg

## What is CVE-2018-9853?

CVE-2018-9853 is a critical vulnerability in n/a, published on 10 Jul 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Insecure access control in freeSSHd version 1.3.1 allows attackers to obtain the privileges of the freesshd.exe process by leveraging the ability to login to an unprivileged account on the server.

Weakness: CWE-269 (Improper Privilege Management)

## Which versions are affected by CVE-2018-9853?

It affects 1 product.


Products: Freesshd Freesshd.

## How do I fix CVE-2018-9853?

No fix has been published for CVE-2018-9853 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-9853 being exploited?

There is no known exploitation of CVE-2018-9853 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2012-6066](https://insights.sbomify.com/CVE-2012-6066/): Auth bypass in n/a (critical 9.3)
- [CVE-2008-6899](https://insights.sbomify.com/CVE-2008-6899/): Memory corruption in n/a (critical 9.0)
- [CVE-2008-4762](https://insights.sbomify.com/CVE-2008-4762/): Memory corruption in n/a (critical 9.0)
- [CVE-2008-2573](https://insights.sbomify.com/CVE-2008-2573/): Memory corruption in n/a (high 8.5)
- [CVE-2017-1000475](https://insights.sbomify.com/CVE-2017-1000475/): Privilege escalation in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-9853 and fix it if it is affected.

What it is: CVE-2018-9853 is a critical vulnerability in n/a, published on 10 Jul 2018. 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-2018-9853 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-2018-9853/ (Markdown: https://insights.sbomify.com/CVE-2018-9853/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-9853
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-9853
- OSV: https://osv.dev/vulnerability/CVE-2018-9853

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-9853/
Summaries are generated and may contain mistakes; the official description above is the record.