Authentication Bypass by Spoofing Affecting samba package, versions [0,]


0.0
high
  • Attack Complexity

    Low

  • Confidentiality

    High

  • Integrity

    High

  • Availability

    High

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  • snyk-id

    SNYK-UNMANAGED-SAMBA-2961658

  • published

    28 Jul 2022

  • disclosed

    27 Jul 2022

  • credit

    Joseph Sutton of Catalyst

How to fix?

A fix was pushed into the master branch but not yet published.

Overview

Affected versions of this package are vulnerable to Authentication Bypass by Spoofing. The KDC accepts kpasswd requests encrypted with any key known to it. By encrypting forged kpasswd requests with its own key, a user can change other users' passwords, enabling full domain takeover.

Workarounds:

kpasswd is not a critical protocol for the AD DC in most installations, it can be disabled by setting kpasswd port = 0 in the smb.conf.