# CVE-2015-2809: Information disclosure in n/a

> Remote attackers can exploit mDNS responder flaws in Synology DSM to cause denial of service or obtain sensitive information via UDP packets.

- **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:P/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:** 1 Apr 2015
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-wgcg-8h66-7wvp

## What is CVE-2015-2809?

CVE-2015-2809 is a medium-severity vulnerability in Synology Diskstation Manager, published on 1 Apr 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Multicast DNS (mDNS) responder in Synology DiskStation Manager (DSM) before 3.1 inadvertently responds to unicast queries with source addresses that are not link-local, which allows remote attackers to cause a denial of service (traffic amplification) or obtain potentially sensitive information via port-5353 UDP packets to the Avahi component.

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2015-2809?

It affects 1 product.


Products: Synology Diskstation Manager.

## How do I fix CVE-2015-2809?

No fix has been published for CVE-2015-2809 yet. Limit exposure of the affected software until one is available.

## Is CVE-2015-2809 being exploited?

There is no known exploitation of CVE-2015-2809 in the wild and no public exploit code.

## 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-2013-6955](https://insights.sbomify.com/CVE-2013-6955/): Path traversal in n/a (critical 10.0)
- [CVE-2022-22687](https://insights.sbomify.com/CVE-2022-22687/): Memory corruption in DiskStation Manager (DSM) (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2015-2809 and fix it if it is affected.

What it is: CVE-2015-2809 is a medium-severity vulnerability in Synology Diskstation Manager, published on 1 Apr 2015. 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-2015-2809 in the wild and no public exploit code.

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-2015-2809/ (Markdown: https://insights.sbomify.com/CVE-2015-2809/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-2809
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-2809
- OSV: https://osv.dev/vulnerability/CVE-2015-2809

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-2809/
Summaries are generated and may contain mistakes; the official description above is the record.