# CVE-2020-15518: Missing authorization in n/a

> Unprivileged users can gain total control over filesystem I/O requests due to missing device object DACLs in Veeam Availability Suite and Backup & Replication.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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:** 3 Jul 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-6qmr-c25c-w299

## What is CVE-2020-15518?

CVE-2020-15518 is a high-severity missing authorization vulnerability in n/a, published on 3 Jul 2020. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

VeeamFSR.sys in Veeam Availability Suite before 10 and Veeam Backup & Replication before 10 has no device object DACL, which allows unprivileged users to achieve total control over filesystem I/O requests.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2020-15518?

It affects 2 products.


Products: Veeam Veeam Availability Suite, Veeam Veeam Backup \& Replication.

## How do I fix CVE-2020-15518?

No fix has been published for CVE-2020-15518 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-15518 being exploited?

There is no known exploitation of CVE-2020-15518 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-15518 and fix it if it is affected.

What it is: CVE-2020-15518 is a high-severity missing authorization vulnerability in n/a, published on 3 Jul 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-2020-15518 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-2020-15518/ (Markdown: https://insights.sbomify.com/CVE-2020-15518/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-15518
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-15518
- OSV: https://osv.dev/vulnerability/CVE-2020-15518

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-15518/
Summaries are generated and may contain mistakes; the official description above is the record.