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Category:   Application (File Transfer/Sharing)  >   Samba Vendors:   Samba.org
Samba Multiple Flaws Let Remote Users Access Data and Files, Obtain Potentially Sensitive Information, and Deny Service
SecurityTracker Alert ID:  1034493
SecurityTracker URL:  http://securitytracker.com/id/1034493
CVE Reference:   CVE-2015-3223, CVE-2015-5252, CVE-2015-5296, CVE-2015-5299, CVE-2015-5330, CVE-2015-8467   (Links to External Site)
Date:  Dec 18 2015
Impact:   Denial of service via network, Disclosure of system information, Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to versions 4.1.22, 4.2.7, 4.3.3
Description:   Multiple vulnerabilities were reported in Samba. A remote user can access data on the target system. A remote user can consume excessive CPU resources on the target system. A remote user can cause the target system to crash. A remote user can obtain files on the target system. A remote user can obtain potentially sensitive information on the target system.

A remote user can send a specially crafted request to the target Samba LDAP server to consume excessive CPU resources on the target system and cause the LDAP server to become unresponsive [CVE-2015-3223]. Versions 4.0.0 through 4.3.2 are affected.

Thilo Uttendorfer of Linux Information Systems AG reported this vulnerability.

The smbd server does not properly verify symbolic links (symlinks). In certain situations, a remote user can access files located outside of the exported share path [CVE-2015-5252]. Versions 3.0.0 through 4.3.2 are affected.

Jan 'Yenya' Kasprzak and the Computer Systems Unit team at Faculty of Informatics, Masaryk University reported this vulnerability.

The system does not properly negotiate signing when establishing an encrypted connection. A remote user that can conduct a man-in-the-middle attack can downgrade the connection and then connect via an unsigned, unencrypted connection [CVE-2015-5296]. Versions 3.2.0 through 4.3.2 are affected.

Stefan Metzmacher of SerNet (www.sernet.com) and the Samba Team reported this vulnerability.

The vfs_shadow_copy2 module does not properly enforce access controls. A remote user without the DIRECTORY_LIST access rights can view the current snapshots [CVE-2015-5299]. Versions 3.2.0 through 4.3.2 are affected.

A remote user can send specially crafted packets to cause the LDAP server in the target samba daemon process to return portions of heap memory [CVE-2015-5330]. Versions 4.0.0 through 4.3.2 are affected.

Douglas Bagnall of Catalyst (www.catalyst.net.nz) reported this vulnerability.

A remote authenticated non-administrative user can bypass the quota limit and create excessive accounts on the target system [CVE-2015-8467]. Versions 4.0.0 through 4.3.2 are affected.

A domain environment with Samba and Windows Active Directory Domain Controllers is affected.

Impact:   A remote user can obtain snapshot data on the target system.

A remote user can consume excessive CPU resources on the target system and cause the target LDAP service to become unresponsive.

A remote user can cause the target system to crash.

A remote user can obtain files on the target system that are located outside of the share path.

A remote user can obtain potentially sensitive information on the target system.

Solution:   The vendor has issued a fix (4.1.22, 4.2.7, 4.3.3).

The vendor's advisories are available at:

https://www.samba.org/samba/security/CVE-2015-3223.html
https://www.samba.org/samba/security/CVE-2015-5252.html
https://www.samba.org/samba/security/CVE-2015-5296.html
https://www.samba.org/samba/security/CVE-2015-5299.html
https://www.samba.org/samba/security/CVE-2015-5330.html
https://www.samba.org/samba/security/CVE-2015-8467.html

Vendor URL:  www.samba.org/samba/security/CVE-2015-3223.html (Links to External Site)
Cause:   Access control error, Resource error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Jan 5 2016 (Ubuntu Issues Fix) Samba Multiple Flaws Let Remote Users Access Data and Files, Obtain Potentially Sensitive Information, and Deny Service
Ubuntu has issued a fix for Ubuntu Linux 12.04 LTS, 14.04 LTS, 15.04, and 15.10.
Jan 8 2016 (Red Hat Issues Fix) Samba Multiple Flaws Let Remote Users Access Data and Files, Obtain Potentially Sensitive Information, and Deny Service
Red Hat has issued a fix for Red Hat Enterprise Linux 7.
Jan 8 2016 (Red Hat Issues Fix) Samba Multiple Flaws Let Remote Users Access Data and Files, Obtain Potentially Sensitive Information, and Deny Service
Red Hat has issued a fix for Red Hat Enterprise Linux 6.
Jan 8 2016 (Red Hat Issues Fix) Samba Multiple Flaws Let Remote Users Access Data and Files, Obtain Potentially Sensitive Information, and Deny Service
Red Hat has issued a fix for Red Hat Enterprise Linux 6.
Jan 8 2016 (Red Hat Issues Fix) Samba Multiple Flaws Let Remote Users Access Data and Files, Obtain Potentially Sensitive Information, and Deny Service
Red Hat has issued a fix for Red Hat Gluster Storage for Red Hat Enterprise Linux.
Jan 8 2016 (Red Hat Issues Fix) Samba Multiple Flaws Let Remote Users Access Data and Files, Obtain Potentially Sensitive Information, and Deny Service
Red Hat has issued a fix for Red Hat Gluster Storage for Red Hat Enterprise Linux 7.
Feb 8 2016 (CentOS Issues Fix) Samba Multiple Flaws Let Remote Users Access Data and Files, Obtain Potentially Sensitive Information, and Deny Service
CentOS has issued a fix for CentOS 6.
Feb 8 2016 (CentOS Issues Fix) Samba Multiple Flaws Let Remote Users Access Data and Files, Obtain Potentially Sensitive Information, and Deny Service
CentOS has issued a fix for Samba4 for CentOS 6.
Feb 8 2016 (CentOS Issues Fix) Samba Multiple Flaws Let Remote Users Access Data and Files, Obtain Potentially Sensitive Information, and Deny Service
CentOS has issued a fix for CentOS 7.
May 11 2016 (HP Issues Fix) Samba Multiple Flaws Let Remote Users Access Data and Files, Obtain Potentially Sensitive Information, and Deny Service
HP has issued a fix for HP-UX 11.31.
Jul 8 2016 (IBM Issues Fix for IBM Storwize V7000 Unified) Samba Multiple Flaws Let Remote Users Access Data and Files, Obtain Potentially Sensitive Information, and Deny Service
IBM has issued a fix for IBM Storwize V7000 Unified.



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