CVE-2012-6150

CVE-2012-6150 is a low-severity vulnerability in Samba with a CVSS 2.0 base score of 3.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

• Severity: Low (CVSS 2.0 base score 3.6)
• EPSS exploit prediction: 4% (89th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-20
• Affected product: Samba
• Published: 2013-12-03
• Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2012-6150?

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.

How severe is CVE-2012-6150?

CVE-2012-6150 has a CVSS 2.0 base score of 3.6, rated low severity.

Is CVE-2012-6150 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-6150?

CVE-2012-6150 primarily affects Samba. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2012-6150?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2012-6150 published?

CVE-2012-6150 was published on 2013-12-03 and last updated on 2026-06-16.

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

Affected products (6)

• cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:10.04:*:*:*:-:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:12.10:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:13.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:13.10:*:*:*:*:*:*:*

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