# CVE-2019-3786: BBR could run arbitrary scripts on deployment VMs

> Authenticated attackers can execute arbitrary scripts on deployment VMs by manipulating BBR metadata, affecting Cloud Foundry BBR CLI users.

- **Severity:** High 7.7 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N`)
- **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:** 24 Apr 2019
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-xr6m-h5m8-p48r

## What is CVE-2019-3786?

CVE-2019-3786 is a high-severity code injection vulnerability in Cloud Foundry BOSH Backup and Restore, published on 24 Apr 2019. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Cloud Foundry BOSH Backup and Restore CLI, all versions prior to 1.5.0, does not check the authenticity of backup scripts in BOSH. A remote authenticated malicious user can modify the metadata file of a Bosh Backup and Restore job to request extra backup files from different jobs upon restore. The exploited hooks in this metadata script were only maintained in the cfcr-etcd-release, so clusters deployed with the BBR job for etcd in this release are vulnerable.

Weakness: CWE-345 (Insufficient Verification of Data Authenticity), CWE-269 (Improper Privilege Management)

## Which versions are affected by CVE-2019-3786?

It affects 1 product.


Products: Cloudfoundry Bosh Backup and Restore.

## How do I fix CVE-2019-3786?

No fix has been published for CVE-2019-3786 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-3786 being exploited?

There is no known exploitation of CVE-2019-3786 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-3786 and fix it if it is affected.

What it is: CVE-2019-3786 is a high-severity code injection vulnerability in Cloud Foundry BOSH Backup and Restore, published on 24 Apr 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-3786 in the wild and no public exploit code.

Affected product: Cloud Foundry BOSH Backup and Restore. 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-2019-3786/ (Markdown: https://insights.sbomify.com/CVE-2019-3786/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-3786
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-3786
- OSV: https://osv.dev/vulnerability/CVE-2019-3786

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-3786/
Summaries are generated and may contain mistakes; the official description above is the record.