What’s Vulnerable › Vulnerabilities

CVE-2016-2125

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 9.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-10-31 · updated 2026-06-17
• Weakness: CWE-287

Description

It was found that Samba before versions 4.5.3, 4.4.8, 4.3.13 always requested forwardable tickets when using Kerberos authentication. A service to which Samba authenticated using Kerberos could subsequently use the ticket to impersonate Samba to other services or domain users.

Affected products

• RedHat Enterprise Linux Desktop: 6.0, 7.0
• RedHat Enterprise Linux Server: 6.0, 7.0
• RedHat Enterprise Linux Server Aus: 7.4, 7.6
• RedHat Enterprise Linux Server Eus: 7.3, 7.4, 7.5, 7.6
• RedHat Enterprise Linux Server Tus: 7.3, 7.6
• RedHat Enterprise Linux Workstation: 6.0, 7.0
• Red Hat, Inc. Gluster Storage for RHEL 6: 3.0
• Samba: from 3.0.25 before 4.3.13; from 4.4.0 before 4.4.8; from 4.5.0 before 4.5.3 — fixed in 4.3.13, 4.4.8, 4.5.3

How to fix

Upgrade to a fixed version: Samba 4.3.13, 4.4.8, 4.5.3. Check the vendor advisory for mitigations.

References

• http://rhn.redhat.com/errata/RHSA-2017-0494.html
• http://rhn.redhat.com/errata/RHSA-2017-0495.html
• http://rhn.redhat.com/errata/RHSA-2017-0662.html
• http://rhn.redhat.com/errata/RHSA-2017-0744.html
• http://www.securityfocus.com/bid/94988
• http://www.securitytracker.com/id/1037494
• https://access.redhat.com/errata/RHSA-2017:1265
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-2125
• https://www.samba.org/samba/security/CVE-2016-2125.html
• http://rhn.redhat.com/errata/RHSA-2017-0494.html
• http://rhn.redhat.com/errata/RHSA-2017-0495.html
• http://rhn.redhat.com/errata/RHSA-2017-0662.html

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