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Submitted URL:
https://www.cisa.gov/uscert/ncas/current-activity/2017/01/16/SMB-Security-Best-Practices
Effective URL:
https://www.cisa.gov/news-events/alerts/2017/01/16/smb-security-best-practices
Submission: On March 04 via api (March 4th 2023, 7:14:44 am UTC) from US — Scanned from DE

Form analysis
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ARCHIVED CONTENT

In an effort to keep CISA.gov current, the archive contains outdated information
that may not reflect current policy or programs.
Alert


SMB SECURITY BEST PRACTICES

Last Revised
March 16, 2017


In response to public reporting of a potential Server Message Block (SMB)
vulnerability, US-CERT is providing known best practices related to SMB. This
service is universally available for Windows systems, and legacy versions of SMB
protocols could allow a remote attacker to obtain sensitive information from
affected systems.

US-CERT recommends that users and administrators consider:

 * disabling SMBv1 and
 * blocking all versions of SMB at the network boundary by blocking TCP port 445
   with related protocols on UDP ports 137-138 and TCP port 139, for all
   boundary devices.

US-CERT cautions users and administrators that disabling or blocking SMB may
create problems by obstructing access to shared files, data, or devices. The
benefits of mitigation should be weighed against potential disruptions to users.
For more information on SMB, please review Microsoft Security Advisories
2696547(link is external) and 204279(link is external).


RELATED ADVISORIES

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Alert


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Alert


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www.cisa.gov Open in urlscan Pro 2a02:26f0:dc:392::447a Public Scan

Form analysis 2 forms found in the DOM

Text Content

www.cisa.gov Open in urlscan Pro
2a02:26f0:dc:392::447a Public Scan

Form analysis
2 forms found in the DOM