# CVE-2019-9649: Path traversal in n/a

> A remote attacker can exploit a directory traversal flaw in the SFTP Server to browse outside the root directory and determine file existence and modification dates.

- **Severity:** Medium 5.3 (`CVSS:3.0/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:** 22 Mar 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-7q4x-vmrj-p8p2

## What is CVE-2019-9649?

CVE-2019-9649 is a medium-severity path traversal vulnerability in n/a, published on 22 Mar 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in the SFTP Server component in Core FTP 2.0 Build 674. Using the MDTM FTP command, a remote attacker can use a directory traversal technique (..\..\) to browse outside the root directory to determine the existence of a file on the operating system, and its last modified date.

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

## Which versions are affected by CVE-2019-9649?

It affects 1 product.


Products: Coreftp Core Ftp.

## How do I fix CVE-2019-9649?

No fix has been published for CVE-2019-9649 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-9649 being exploited?

There is no known exploitation of CVE-2019-9649 in the wild and no public exploit code.

Public exploit code:

- Core FTP Server FTP / SFTP Server v2 Build 674 - 'MDTM' Directory Traversal (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2020-19596](https://insights.sbomify.com/CVE-2020-19596/): Memory corruption in n/a (critical 9.8)
- [CVE-2018-12113](https://insights.sbomify.com/CVE-2018-12113/): Memory corruption in n/a (critical 9.8)
- [CVE-2013-3930](https://insights.sbomify.com/CVE-2013-3930/): Memory corruption in n/a (critical 9.3)
- [CVE-2009-3484](https://insights.sbomify.com/CVE-2009-3484/): Memory corruption in n/a (critical 9.3)
- [CVE-2019-25686](https://insights.sbomify.com/CVE-2019-25686/): Core FTP 2.0 build 653 PBSZ Unauthenticated Denial of Service (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-9649 and fix it if it is affected.

What it is: CVE-2019-9649 is a medium-severity path traversal vulnerability in n/a, published on 22 Mar 2019. 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-2019-9649 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-2019-9649/ (Markdown: https://insights.sbomify.com/CVE-2019-9649/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-9649
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-9649
- OSV: https://osv.dev/vulnerability/CVE-2019-9649

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-9649/
Summaries are generated and may contain mistakes; the official description above is the record.