# CVE-2013-6955: Path traversal in n/a

> Remote attackers can execute arbitrary code by appending data to files via a crafted HTTP header in Synology DSM.

- **Severity:** Critical 10.0 (`AV:N/AC:L/Au:N/C:C/I:C/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Jan 2014
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-cf8x-55vw-78gp

## What is CVE-2013-6955?

CVE-2013-6955 is a critical path traversal vulnerability in Synology Diskstation Manager, published on 9 Jan 2014. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

webman/imageSelector.cgi in Synology DiskStation Manager (DSM) 4.0 before 4.0-2259, 4.2 before 4.2-3243, and 4.3 before 4.3-3810 Update 1 allows remote attackers to append data to arbitrary files, and consequently execute arbitrary code, via a pathname in the SLICEUPLOAD X-TMP-FILE HTTP header.

Weakness: CWE-264

## Which versions are affected by CVE-2013-6955?

It affects 1 product.


Products: Synology Diskstation Manager.

## How do I fix CVE-2013-6955?

No fix has been published for CVE-2013-6955 yet. Limit exposure of the affected software until one is available.

## Is CVE-2013-6955 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2013-6955 exists.

Public exploit code:

- Synology DiskStation Manager SLICEUPLOAD Remote Command Execution (metasploit)
- Synology DiskStation Manager - SLICEUPLOAD Remote Command Execution (Metasploit) (exploitdb)

## Other vulnerabilities in Synology Diskstation Manager

- [CVE-2022-27624](https://insights.sbomify.com/CVE-2022-27624/): Memory corruption in DiskStation Manager (DSM) (critical 10.0)
- [CVE-2022-27625](https://insights.sbomify.com/CVE-2022-27625/): Memory corruption in DiskStation Manager (DSM) (critical 10.0)
- [CVE-2022-27626](https://insights.sbomify.com/CVE-2022-27626/): Race condition in DiskStation Manager (DSM) (critical 10.0)
- [CVE-2022-22687](https://insights.sbomify.com/CVE-2022-22687/): Memory corruption in DiskStation Manager (DSM) (critical 9.8)
- [CVE-2021-27649](https://insights.sbomify.com/CVE-2021-27649/): Use after free in DiskStation Manager (DSM) (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2013-6955 and fix it if it is affected.

What it is: CVE-2013-6955 is a critical path traversal vulnerability in Synology Diskstation Manager, published on 9 Jan 2014. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2013-6955 exists.

Affected product: Synology Diskstation Manager. 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-2013-6955/ (Markdown: https://insights.sbomify.com/CVE-2013-6955/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2013-6955
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2013-6955
- OSV: https://osv.dev/vulnerability/CVE-2013-6955

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From sbomify Insights: https://insights.sbomify.com/CVE-2013-6955/
Summaries are generated and may contain mistakes; the official description above is the record.