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CVE-2012-6150

Status Candidate

Overview

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.

Related Files

Gentoo Linux Security Advisory 201502-15
Posted Feb 26, 2015
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201502-15 - Multiple vulnerabilities have been found in Samba, the worst of which allowing a context-dependent attacker to bypass intended file restrictions, cause a Denial of Service or execute arbitrary code. Versions less than 3.6.25 are affected.

tags | advisory, denial of service, arbitrary, vulnerability
systems | linux, gentoo
advisories | CVE-2012-6150, CVE-2013-4124, CVE-2013-4408, CVE-2013-4475, CVE-2013-4476, CVE-2013-4496, CVE-2014-0178, CVE-2014-0239, CVE-2014-0244, CVE-2014-3493, CVE-2015-0240
MD5 | ed6680e5a8bdf6ccae7ffd7a0557a2d5
HP Security Bulletin HPSBUX03087 SSRT101413 2
Posted Nov 22, 2014
Authored by HP | Site hp.com

HP Security Bulletin HPSBUX03087 SSRT101413 2 - Potential security vulnerabilities have been identified with HP-UX CIFS-Server (Samba). The vulnerabilities could be exploited remotely to cause a Denial of Service (DoS), execution of arbitrary code, or unauthorized access. Revision 2 of this advisory.

tags | advisory, denial of service, arbitrary, vulnerability
systems | hpux
advisories | CVE-2012-6150, CVE-2013-4124, CVE-2013-4408
MD5 | cd81e5796c2cf931df077deee4782d3e
HP Security Bulletin HPSBUX03087 SSRT101413
Posted Aug 8, 2014
Authored by HP | Site hp.com

HP Security Bulletin HPSBUX03087 SSRT101413 - Potential security vulnerabilities have been identified with HP-UX CIFS-Server (Samba). The vulnerabilities could be exploited remotely to cause a Denial of Service (DoS). Revision 1 of this advisory.

tags | advisory, denial of service, vulnerability
systems | hpux
advisories | CVE-2012-6150, CVE-2013-4124, CVE-2013-4408
MD5 | ef873f56dff5344e197b5a2df6d3cff1
Red Hat Security Advisory 2014-0383-01
Posted Apr 9, 2014
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2014-0383-01 - Samba is an open-source implementation of the Server Message Block or Common Internet File System protocol, which allows PC-compatible machines to share files, printers, and other information. It was found that certain Samba configurations did not enforce the password lockout mechanism. A remote attacker could use this flaw to perform password guessing attacks on Samba user accounts. Note: this flaw only affected Samba when deployed as a Primary Domain Controller. A flaw was found in Samba's "smbcacls" command, which is used to set or get ACLs on SMB file shares. Certain command line options of this command would incorrectly remove an ACL previously applied on a file or a directory, leaving the file or directory without the intended ACL.

tags | advisory, remote, protocol
systems | linux, redhat
advisories | CVE-2012-6150, CVE-2013-4496, CVE-2013-6442
MD5 | 9801c5ac35f9ea6c1c5d12214ed3e0fa
Red Hat Security Advisory 2014-0330-01
Posted Mar 25, 2014
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2014-0330-01 - Samba is an open-source implementation of the Server Message Block or Common Internet File System protocol, which allows PC-compatible machines to share files, printers, and other information. It was found that certain Samba configurations did not enforce the password lockout mechanism. A remote attacker could use this flaw to perform password guessing attacks on Samba user accounts. Note: this flaw only affected Samba when deployed as a Primary Domain Controller. A flaw was found in the way the pam_winbind module handled configurations that specified a non-existent group as required. An authenticated user could possibly use this flaw to gain access to a service using pam_winbind in its PAM configuration when group restriction was intended for access to the service.

tags | advisory, remote, protocol
systems | linux, redhat
advisories | CVE-2012-6150, CVE-2013-4496
MD5 | 7721c347094c426ca0384431fcb9e3b4
Mandriva Linux Security Advisory 2013-299
Posted Dec 23, 2013
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Advisory 2013-299 - 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.

tags | advisory, remote, overflow, arbitrary
systems | linux, mandriva
advisories | CVE-2012-6150, CVE-2013-4408
MD5 | d8afd9b72497c1414e548a4f7fe44d94
Ubuntu Security Notice USN-2054-1
Posted Dec 12, 2013
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2054-1 - It was discovered that Winbind incorrectly handled invalid group names with the require_membership_of parameter. If an administrator used an invalid group name by mistake, access was granted instead of having the login fail. Stefan Metzmacher and Michael Adam discovered that Samba incorrectly handled DCE-RPC fragment length fields. A remote attacker could use this issue to cause Samba to crash, resulting in a denial of service, or possibly execute arbitrary code as the root user. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary, root
systems | linux, ubuntu
advisories | CVE-2012-6150, CVE-2013-4408, CVE-2013-4475, CVE-2012-6150, CVE-2013-4408, CVE-2013-4475
MD5 | e9325dca9b855c1fa91ba0da3bd26f0c
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