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.
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/94994
http://www.securitytracker.com/id/1037495
https://access.redhat.com/errata/RHSA-2017:1265
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA43730
Source: MITRE
Published: 2017-05-11
Updated: 2018-05-11
Type: CWE-264
Base Score: 4
Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P
Impact Score: 2.9
Exploitability Score: 8
Severity: MEDIUM
Base Score: 6.5
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Impact Score: 3.6
Exploitability Score: 2.8
Severity: MEDIUM