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.
CVE-2012-6150
LOWCVSS v2 · 3.63.6—
EchelonGraph scoreLOW confidence
This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 3.6 — v2 rates that LOW (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:N/AC:H/Au:S/C:P/I:P/A:N. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 3.8% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.
Sources: epss, nvd_v2
3.6EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 3.8%CVSS v2: 3.6Exploit: None knownExposed services: —
A fix is available — apply it.
Internet exposure
The internet-exposure footprint is temporarily unavailable — the KEV-Exposure radar's record for this CVE could not be loaded just now. That is not a finding of zero exposed services; please retry shortly.
- CVSS v2.0 (legacy)
- 3.6LOWNVD never assigned a CVSS v3 rating to this CVE
- EG Score
- 3.6LOWlow confidence
- EG Risk
- 22EG Risk 22/100CISA SSVC
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity36% × 45%Exploitation4% × 40%Automatability30% × 15%CISA SSVC: Track at low or medium mission impact; Track or Track* or Attend at high (mission-essential systems).Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 3.8%
- EPSS %ILE
- 89th
- KEV
- Not listed
CISA SSVCTrack at low or medium mission impact; Track or Track* or Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact unknown (not published for this CVE). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
December 3, 2013
Last Modified
April 29, 2026
References (34)
- secalert@redhathttp://lists.fedoraproject.org/pipermail/package-announce/2014-August/136864.html
- secalert@redhathttp://lists.fedoraproject.org/pipermail/package-announce/2014-June/134717.html
- secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2014-01/msg00002.html
- secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html
- secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html
- secalert@redhathttp://lists.opensuse.org/opensuse-updates/2013-12/msg00088.html
- secalert@redhathttp://lists.opensuse.org/opensuse-updates/2014-03/msg00063.html
- secalert@redhathttp://marc.info/?l=bugtraq&m=141660010015249&w=2
- secalert@redhathttp://openwall.com/lists/oss-security/2013/12/03/5
- secalert@redhathttp://rhn.redhat.com/errata/RHSA-2014-0330.html
- secalert@redhathttp://security.gentoo.org/glsa/glsa-201502-15.xml
- secalert@redhathttp://www.mandriva.com/security/advisories?name=MDVSA-2013:299
- secalert@redhathttp://www.ubuntu.com/usn/USN-2054-1
- secalert@redhathttps://bugzilla.redhat.com/show_bug.cgi?id=1036897
- secalert@redhathttps://bugzilla.samba.org/show_bug.cgi?id=10300
Vendor Advisories for CVE-2012-6150
Vendor advisories for this CVE are temporarily unavailable — the list could not be loaded just now. That is not a sign that none exist; please retry shortly.
Patch Availability(2)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| redhat | https://access.redhat.com/errata/RHSA-2014:0383 @ 2014-04-09 00:00:00+00 (fixes samba4-0:4.0.0-61.el6_5.rc4) | — | 2026-05-28 21:27:00.449959+00 |
| redhat | https://access.redhat.com/errata/RHSA-2014:0330 @ 2014-03-25 00:00:00+00 (fixes samba-0:3.6.9-168.el6_5) | — | 2026-05-28 21:27:00.43777+00 |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Related CVEs
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Frequently asked(4)
What is CVE-2012-6150?
CVE-2012-6150 is a low vulnerability published on December 3, 2013. The winbindnamelisttosidstringlist function in nsswitch/pamwinbind.c in Samba through 4.1.2 handles invalid requiremembershipof group names by accepting authentication by any user, which allows remote authenticated users to bypass intended access restrictions in opportunistic circumstances by…
When was CVE-2012-6150 disclosed?
CVE-2012-6150 was first published on December 3, 2013, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2012-6150 actively exploited?
CVE-2012-6150 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.8% probability of exploitation in the next 30 days (89th percentile of EPSS-scored CVEs).
How do I remediate CVE-2012-6150?
A fix for CVE-2012-6150 is available: update to the fixed version the vendor names in its advisory.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2012-6150
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