Input validation error in Samba - CVE-2012-6150
Published: December 3, 2013 / Updated: August 3, 2020
Vulnerability identifier: #VU33302
CSH Severity: Low
CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2012-6150
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote #AU# to read and manipulate data.
The winbind_name_list_to_sid_string_list function in nsswitch/pam_winbind.c in Samba through 4.1.2 handles invalid require_membership_of group names by accepting authentication by any user, which allows remote authenticated users to bypass intended access restrictions in opportunistic circumstances by leveraging an administrator's pam_winbind configuration-file mistake.
Affected software
Samba
Ubuntu
SUSE Linux
samba (Alpine package)
winbind (Ubuntu package)
samba (Ubuntu package)
libpam-winbind (Ubuntu package)
Ubuntu
SUSE Linux
samba (Alpine package)
winbind (Ubuntu package)
samba (Ubuntu package)
libpam-winbind (Ubuntu package)
How to mitigate CVE-2012-6150
Install update from vendor's website.
Samba - update to 4.1.3
samba (Alpine package) - update to 3.6.22-r0
winbind (Ubuntu package) - update to 2:3.4.7~dfsg-1ubuntu3.13
samba (Ubuntu package) - addressed in versions 2:3.4.7~dfsg-1ubuntu3.13, 2:3.6.3-2ubuntu2.9, 2:3.6.6-3ubuntu5.3, 2:3.6.9-1ubuntu1.2, 2:3.6.18-1ubuntu3.1
libpam-winbind (Ubuntu package) - addressed in versions 2:3.6.3-2ubuntu2.9, 2:3.6.6-3ubuntu5.3, 2:3.6.9-1ubuntu1.2, 2:3.6.18-1ubuntu3.1
samba (Alpine package) - update to 3.6.22-r0
winbind (Ubuntu package) - update to 2:3.4.7~dfsg-1ubuntu3.13
samba (Ubuntu package) - addressed in versions 2:3.4.7~dfsg-1ubuntu3.13, 2:3.6.3-2ubuntu2.9, 2:3.6.6-3ubuntu5.3, 2:3.6.9-1ubuntu1.2, 2:3.6.18-1ubuntu3.1
libpam-winbind (Ubuntu package) - addressed in versions 2:3.6.3-2ubuntu2.9, 2:3.6.6-3ubuntu5.3, 2:3.6.9-1ubuntu1.2, 2:3.6.18-1ubuntu3.1
External References
- http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136864.html
- http://lists.fedoraproject.org/pipermail/package-announce/2014-June/134717.html
- http://lists.opensuse.org/opensuse-security-announce/2014-01/msg00002.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html
- http://lists.opensuse.org/opensuse-updates/2013-12/msg00088.html
- http://lists.opensuse.org/opensuse-updates/2014-03/msg00063.html
- http://marc.info/?l=bugtraq&m=141660010015249&w=2
- http://openwall.com/lists/oss-security/2013/12/03/5
- http://rhn.redhat.com/errata/RHSA-2014-0330.html
- http://security.gentoo.org/glsa/glsa-201502-15.xml
- http://www.mandriva.com/security/advisories?name=MDVSA-2013:299
- http://www.ubuntu.com/usn/USN-2054-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1036897
- https://bugzilla.samba.org/show_bug.cgi?id=10300
- https://lists.samba.org/archive/samba-technical/2012-June/084593.html
- https://lists.samba.org/archive/samba-technical/2013-November/096411.html