CVE-2016-2126

Description

Samba version 4.0.0 up to 4.5.2 is vulnerable to privilege elevation due to incorrect handling of the PAC (Privilege Attribute Certificate) checksum. A remote, authenticated, attacker can cause the winbindd process to crash using a legitimate Kerberos ticket. A local service with access to the winbindd privileged pipe can cause winbindd to cache elevated access permissions.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 3.25% Top 15%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory samba.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.samba.org/samba/security/CVE-2016-2126.html vendor advisory
http://www.securitytracker.com/id/1037495 third party advisory vdb entry
http://rhn.redhat.com/errata/RHSA-2017-0495.html third party advisory vendor advisory
http://rhn.redhat.com/errata/RHSA-2017-0494.html third party advisory vendor advisory
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA43730 third party advisory
https://access.redhat.com/errata/RHSA-2017:1265 third party advisory vendor advisory
http://www.securityfocus.com/bid/94994 third party advisory vdb entry
http://rhn.redhat.com/errata/RHSA-2017-0744.html third party advisory vendor advisory
http://rhn.redhat.com/errata/RHSA-2017-0662.html third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2016-2126?
CVE-2016-2126 has been scored as a medium severity vulnerability.
How to fix CVE-2016-2126?
To fix CVE-2016-2126, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-2126 being actively exploited in the wild?
It is possible that CVE-2016-2126 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~3% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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