SecurityTracker.com
    Home    |    View Topics    |    Search    |    Contact Us    |   

SecurityTracker
Archives


 


Category:   Application (File Transfer/Sharing)  >   Samba Vendors:   Samba.org
(Oracle Issues Fix for Oracle Linux) Samba Lets Remote Users Downgrade SMB Signing Security Protections on the Target System
SecurityTracker Alert ID:  1036449
SecurityTracker URL:  http://securitytracker.com/id/1036449
CVE Reference:   CVE-2016-2119   (Links to External Site)
Date:  Jul 26 2016
Impact:   Disclosure of system information, Disclosure of user information, Modification of system information, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 4.0.0 to 4.4.4
Description:   A vulnerability was reported in Samba. A remote user can downgrade client signing security controls on the target system.

A remote user that can conduct a man-in-the-middle attack can inject the SMB2_SESSION_FLAG_IS_GUEST or SMB2_SESSION_FLAG_IS_NULL flags to downgrade the client's configuration-required signing protections for SMB2 or SMB3 client connections and impersonate the target server.

Clients that are configured to use SMB signing are affected.

Management tools (e.g., net, samba-tool, rpcclient) that use DCERPC over SMB2/3 connections are also affected.

Stefan Metzmacher of SerNet (https://samba.plus) and the Samba Team (https://www.samba.org) reported this vulnerability.

Impact:   A remote user that can conduct a man-in-the-middle attack can downgrade client signing security controls on the target system.
Solution:   Oracle has issued a fix.

The Oracle Linux advisory is available at:

http://linux.oracle.com/errata/ELSA-2016-1487.html

Vendor URL:  linux.oracle.com/errata/ELSA-2016-1487.html (Links to External Site)
Cause:   State error
Underlying OS:  Linux (Oracle)
Underlying OS Comments:  6

Message History:   This archive entry is a follow-up to the message listed below.
Jul 7 2016 Samba Lets Remote Users Downgrade SMB Signing Security Protections on the Target System



 Source Message Contents

Subject:  [El-errata] ELSA-2016-1487 Moderate: Oracle Linux 6 samba4 security update

Oracle Linux Security Advisory ELSA-2016-1487

http://linux.oracle.com/errata/ELSA-2016-1487.html

The following updated rpms for Oracle Linux 6 have been uploaded to the 
Unbreakable Linux Network:

i386:
samba4-4.2.10-7.el6_8.i686.rpm
samba4-client-4.2.10-7.el6_8.i686.rpm
samba4-common-4.2.10-7.el6_8.i686.rpm
samba4-dc-4.2.10-7.el6_8.i686.rpm
samba4-dc-libs-4.2.10-7.el6_8.i686.rpm
samba4-devel-4.2.10-7.el6_8.i686.rpm
samba4-libs-4.2.10-7.el6_8.i686.rpm
samba4-pidl-4.2.10-7.el6_8.i686.rpm
samba4-python-4.2.10-7.el6_8.i686.rpm
samba4-test-4.2.10-7.el6_8.i686.rpm
samba4-winbind-4.2.10-7.el6_8.i686.rpm
samba4-winbind-clients-4.2.10-7.el6_8.i686.rpm
samba4-winbind-krb5-locator-4.2.10-7.el6_8.i686.rpm

x86_64:
samba4-4.2.10-7.el6_8.x86_64.rpm
samba4-client-4.2.10-7.el6_8.x86_64.rpm
samba4-common-4.2.10-7.el6_8.x86_64.rpm
samba4-dc-4.2.10-7.el6_8.x86_64.rpm
samba4-dc-libs-4.2.10-7.el6_8.x86_64.rpm
samba4-devel-4.2.10-7.el6_8.x86_64.rpm
samba4-libs-4.2.10-7.el6_8.x86_64.rpm
samba4-pidl-4.2.10-7.el6_8.x86_64.rpm
samba4-python-4.2.10-7.el6_8.x86_64.rpm
samba4-test-4.2.10-7.el6_8.x86_64.rpm
samba4-winbind-4.2.10-7.el6_8.x86_64.rpm
samba4-winbind-clients-4.2.10-7.el6_8.x86_64.rpm
samba4-winbind-krb5-locator-4.2.10-7.el6_8.x86_64.rpm


SRPMS:
http://oss.oracle.com/ol6/SRPMS-updates/samba4-4.2.10-7.el6_8.src.rpm



Description of changes:

[4.2.10-7]
- resolves: #1351957 - Fix CVE-2016-2119


_______________________________________________
El-errata mailing list
El-errata@oss.oracle.com
https://oss.oracle.com/mailman/listinfo/el-errata
 
 


Go to the Top of This SecurityTracker Archive Page





Home   |    View Topics   |    Search   |    Contact Us

This web site uses cookies for web analytics. Learn More

Copyright 2019, SecurityGlobal.net LLC