CVE-2012-6150

samba: pam_winbind fails open when non-existent group specified to require_membership_of

Severity Score

6.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

La función winbind_name_list_to_sid_string_list en nsswitch/pam_winbind.c en Samba hasta v4.1.2 maneja nombres de grupo require_membership_of inválidos aceptando autenticación de cualquier usuario, lo cual permite a usuarios autenticados remotamente sortear restricciones de acceso en circunstancias oportunistas mediante el aprovechamiento de un error en el fichero de configuración de administración pam_winbind.

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. Buffer overflow in the dcerpc_read_ncacn_packet_done function in librpc/rpc/dcerpc_util.c in winbindd in Samba 3.x before 3.6.22, 4.0.x before 4.0.13, and 4.1.x before 4.1.3 allows remote AD domain controllers to execute arbitrary code via an invalid fragment length in a DCE-RPC packet. The updated packages has been upgraded to the 3.6.22 version which resolves various upstream bugs and is not vulnerable to these issues.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

High

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

None

Attack Vector

Adjacent

Attack Complexity

High

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2012-12-06 CVE Reserved
2013-12-03 CVE Published
2024-08-06 CVE Updated
2024-08-06 First Exploit
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-20: Improper Input Validation

CAPEC

References (18)

URL	Tag	Source
http://openwall.com/lists/oss-security/2013/12/03/5	Mailing List

URL	Date	SRC
https://lists.samba.org/archive/samba-technical/2012-June/084593.html	2024-08-06
https://lists.samba.org/archive/samba-technical/2013-November/096411.html	2024-08-06

URL	Date	SRC
https://bugzilla.samba.org/show_bug.cgi?id=10300	2022-09-01

URL	Date	SRC
http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136864.html	2022-09-01
http://lists.fedoraproject.org/pipermail/package-announce/2014-June/134717.html	2022-09-01
http://lists.opensuse.org/opensuse-security-announce/2014-01/msg00002.html	2022-09-01
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html	2022-09-01
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html	2022-09-01
http://lists.opensuse.org/opensuse-updates/2013-12/msg00088.html	2022-09-01
http://lists.opensuse.org/opensuse-updates/2014-03/msg00063.html	2022-09-01
http://marc.info/?l=bugtraq&m=141660010015249&w=2	2022-09-01
http://rhn.redhat.com/errata/RHSA-2014-0330.html	2022-09-01
http://security.gentoo.org/glsa/glsa-201502-15.xml	2022-09-01
http://www.mandriva.com/security/advisories?name=MDVSA-2013:299	2022-09-01
http://www.ubuntu.com/usn/USN-2054-1	2022-09-01
https://bugzilla.redhat.com/show_bug.cgi?id=1036897	2014-04-09
https://access.redhat.com/security/cve/CVE-2012-6150	2014-04-09

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Samba Search vendor "Samba"		Samba Search vendor "Samba" for product "Samba"				>= 3.3.10 < 3.4.0 Search vendor "Samba" for product "Samba" and version " >= 3.3.10 < 3.4.0"		-		Affected
Samba Search vendor "Samba"		Samba Search vendor "Samba" for product "Samba"				>= 3.4.3 < 3.6.22 Search vendor "Samba" for product "Samba" and version " >= 3.4.3 < 3.6.22"		-		Affected
Samba Search vendor "Samba"		Samba Search vendor "Samba" for product "Samba"				>= 4.0.0 < 4.0.13 Search vendor "Samba" for product "Samba" and version " >= 4.0.0 < 4.0.13"		-		Affected
Samba Search vendor "Samba"		Samba Search vendor "Samba" for product "Samba"				>= 4.1.0 < 4.1.3 Search vendor "Samba" for product "Samba" and version " >= 4.1.0 < 4.1.3"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				10.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "10.04"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				12.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "12.04"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				12.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "12.10"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				13.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "13.04"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				13.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "13.10"		-		Affected