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Red Hat Enterprise Linux 6: RHSA-2016-1487-01 Moderate: Samba4 MitM Risk

red hat
Calendar Grey July 26, 2016
Scroller Redhat
A notification regarding a minor vulnerability fix in Samba for Red Hat Enterprise Linux 6 has been released and is ready for installation.
An update for samba4 is now available for Red Hat Enterprise Linux 6

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing this update, the smb service will be restarted automatically.

Summary

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.
Security Fix(es):
* A flaw was found in the way Samba initiated signed DCE/RPC connections. A man-in-the-middle attacker could use this flaw to downgrade the connection to not use signing and therefore impersonate the server. (CVE-2016-2119)
Red Hat would like to thank the Samba project for reporting this issue. Upstream acknowledges Stefan Metzmacher as the original reporter.

Topics%20covered

Topics Covered

security advisory samba security fix Red Hat Enterprise Linux man-in-the-middle moderate issue

References

https://access.redhat.com/security/cve/CVE-2016-2119 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux Desktop (v. 6):
Source: samba4-4.2.10-7.el6_8.src.rpm
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-debuginfo-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-debuginfo-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
Red Hat Enterprise Linux HPC Node (v. 6):
Source: samba4-4.2.10-7.el6_8.src.rpm


Read the Full Advisory


Advisory ID: RHSA-2016:1487-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2016:1487.html
Issue date: 2016-07-26

Topic

An update for samba4 is now available for Red Hat Enterprise Linux 6.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory samba security fix Red Hat Enterprise Linux man-in-the-middle moderate issue

Relevant Releases Architectures

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64

Red Hat Enterprise Linux HPC Node (v. 6) - x86_64

Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

Bugs Fixed

1351955 - CVE-2016-2119 samba: Client side SMB2/3 required signing can be downgraded

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