# CVE-2017-9830: Deserialization in n/a

> Remote attackers can execute arbitrary code on Code42 CrashPlan installations by sending malicious serialized objects to the RMI service.

- **Severity:** Critical 9.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 27 Jun 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-5mj7-4hjj-qjrq

## What is CVE-2017-9830?

CVE-2017-9830 is a critical unsafe deserialization vulnerability in n/a, published on 27 Jun 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Remote Code Execution is possible in Code42 CrashPlan 5.4.x via the org.apache.commons.ssl.rmi.DateRMI Java class, because (upon instantiation) it creates an RMI server that listens on a TCP port and deserializes objects sent by TCP clients.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2017-9830?

It affects 1 product.


Products: Code42 Crashplan.

## How do I fix CVE-2017-9830?

No fix has been published for CVE-2017-9830 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-9830 being exploited?

There is no known exploitation of CVE-2017-9830 in the wild and no public exploit code.

Public exploit code:

- https://github.com/securifera/CVE-2017-9830 (github_poc): https://github.com/securifera/CVE-2017-9830

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-9830 and fix it if it is affected.

What it is: CVE-2017-9830 is a critical unsafe deserialization vulnerability in n/a, published on 27 Jun 2017. 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-2017-9830 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-2017-9830/ (Markdown: https://insights.sbomify.com/CVE-2017-9830/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-9830
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-9830
- OSV: https://osv.dev/vulnerability/CVE-2017-9830

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From sbomify Insights: https://insights.sbomify.com/CVE-2017-9830/
Summaries are generated and may contain mistakes; the official description above is the record.