(Red Hat Issues Fix for Red Hat Storage) Samba DCE-RPC Processing Flaw Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID: 1029552|
SecurityTracker URL: http://securitytracker.com/id/1029552
(Links to External Site)
Date: Jan 6 2014
Execution of arbitrary code via network, Root access via network|
Fix Available: Yes Vendor Confirmed: Yes |
A vulnerability was reported in Samba. A remote user can execute arbitrary code on the target system. Red Hat Storage is affected.|
The client code does not properly check the DCE-RPC fragment length. A remote user with control of an Active Directory Domain Controller or a remote user that can conduct a man-in-the-middle attack can cause the winbindd process to execute arbitrary code with root privileges.
On versions 3.4.0 - 3.4.17 and versions 3.5.0 - 3.5.22, a remote user can cause the target service to crash.
Stefan Metzmacher and Michael Adam of SerNet reported this vulnerability.
A remote user can execute arbitrary code on the target system with root privileges.|
Red Hat has issued a fix for Red Hat Storage.|
The Red Hat advisory is available at:
Vendor URL: rhn.redhat.com/errata/RHSA-2014-0009.html (Links to External Site)
|Underlying OS: Linux (Red Hat Enterprise)|
This archive entry is a follow-up to the message listed below.|
Source Message Contents
Subject: [RHSA-2014:0009-01] Important: samba security update|
-----BEGIN PGP SIGNED MESSAGE-----
Red Hat Security Advisory
Synopsis: Important: samba security update
Advisory ID: RHSA-2014:0009-01
Product: Red Hat Storage
Advisory URL: https://rhn.redhat.com/errata/RHSA-2014-0009.html
Issue date: 2014-01-06
CVE Names: CVE-2013-4408 CVE-2013-4475
Updated samba packages that fix two security issues are now available for
Red Hat Storage.
The Red Hat Security Response Team has rated this update as having
important security impact. Common Vulnerability Scoring System (CVSS) base
scores, which give detailed severity ratings, are available for each
vulnerability from the CVE links in the References section.
2. Relevant releases/architectures:
Red Hat Storage Server 2.1 - x86_64
Samba is an open-source implementation of the Server Message Block (SMB) or
Common Internet File System (CIFS) protocol, which allows PC-compatible
machines to share files, printers, and other information.
A heap-based buffer overflow flaw was found in the DCE-RPC client code in
Samba. A specially crafted DCE-RPC packet could cause various Samba
programs to crash or, possibly, execute arbitrary code when parsed.
A malicious or compromised Active Directory Domain Controller could use
this flaw to compromise the winbindd daemon running with root privileges.
A flaw was found in the way Samba performed ACL checks on alternate file
and directory data streams. An attacker able to access a CIFS share with
alternate stream support enabled could access alternate data streams
regardless of the underlying file or directory ACL permissions.
Red Hat would like to thank the Samba project for reporting CVE-2013-4408.
Upstream acknowledges Stefan Metzmacher and Michael Adam of SerNet as the
original reporters of this issue.
All users of Red Hat Storage are advised to upgrade to these updated
packages, which contain backported patches to correct these issues. After
installing this update, the smb service will be restarted automatically.
Before applying this update, make sure all previously released errata
relevant to your system have been applied.
This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
5. Bugs fixed (https://bugzilla.redhat.com/):
1018032 - CVE-2013-4408 samba: Heap-based buffer overflow due to incorrect DCE-RPC fragment length field check
1024542 - CVE-2013-4475 samba: no access check verification on stream files
6. Package List:
Red Hat Storage Server 2.1:
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
The Red Hat security contact is <email@example.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2014 Red Hat, Inc.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.4 (GNU/Linux)
-----END PGP SIGNATURE-----
RHSA-announce mailing list