Red Hat has released a security update for EL6 that will apply to
Koozali SME9.#, it has been rated as Critical
Update will be available from upstream as appropriate.
See here for full notice:
https://rhn.redhat.com/errata/RHSA-2016-0611.html=====================================================================
Red Hat Security Advisory
Synopsis: Critical: samba security update
Advisory ID: RHSA-2016:0611-01
Product: Red Hat Enterprise Linux
Advisory URL:
https://rhn.redhat.com/errata/RHSA-2016-0611.htmlIssue date: 2016-04-12
CVE Names: CVE-2015-5370 CVE-2016-2111 CVE-2016-2112
CVE-2016-2115 CVE-2016-2118
=====================================================================
1. Summary:
An update for samba is now available for Red Hat Enterprise Linux 6.
Red Hat Product Security has rated this update as having a security impact
of Critical. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available for each vulnerability from
the CVE link(s) in the References section.
2. Relevant releases/architectures:
Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) - x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64
3. Description:
Samba is an open-source implementation of the Server Message Block (SMB)
protocol and the related Common Internet File System (CIFS) protocol, which
allow PC-compatible machines to share files, printers, and various
information.
Security Fix(es):
* Multiple flaws were found in Samba's DCE/RPC protocol implementation. A
remote, authenticated attacker could use these flaws to cause a denial of
service against the Samba server (high CPU load or a crash) or, possibly,
execute arbitrary code with the permissions of the user running Samba
(root). This flaw could also be used to downgrade a secure DCE/RPC
connection by a man-in-the-middle attacker taking control of an Active
Directory (AD) object and compromising the security of a Samba Active
Directory Domain Controller (DC). (CVE-2015-5370)
Note: While Samba packages as shipped in Red Hat Enterprise Linux do not
support running Samba as an AD DC, this flaw applies to all roles Samba
implements.
* A protocol flaw, publicly referred to as Badlock, was found in the
Security Account Manager Remote Protocol (MS-SAMR) and the Local Security
Authority (Domain Policy) Remote Protocol (MS-LSAD). Any authenticated
DCE/RPC connection that a client initiates against a server could be used
by a man-in-the-middle attacker to impersonate the authenticated user
against the SAMR or LSA service on the server. As a result, the attacker
would be able to get read/write access to the Security Account Manager
database, and use this to reveal all passwords or any other potentially
sensitive information in that database. (CVE-2016-2118)
* It was discovered that Samba configured as a Domain Controller would
establish a secure communication channel with a machine using a spoofed
computer name. A remote attacker able to observe network traffic could use
this flaw to obtain session-related information about the spoofed machine.
(CVE-2016-2111)
* It was found that Samba's LDAP implementation did not enforce integrity
protection for LDAP connections. A man-in-the-middle attacker could use
this flaw to downgrade LDAP connections to use no integrity protection,
allowing them to hijack such connections. (CVE-2016-2112)
* It was found that Samba did not enable integrity protection for IPC
traffic by default. A man-in-the-middle attacker could use this flaw to
view and modify the data sent between a Samba server and a client.
(CVE-2016-2115)
Red Hat would like to thank the Samba project for reporting these issues.
Upstream acknowledges Jouni Knuutinen (Synopsis) as the original reporter
of CVE-2015-5370; and Stefan Metzmacher (SerNet) as the original reporter
of CVE-2016-2118, CVE-2016-2112, and CVE-2016-2115.
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