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


0.0
high

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.1% (43rd percentile)
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NVD
8.8 high
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SUSE
8.8 high
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Red Hat
8.8 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.