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Bug 1311910 - (CVE-2016-2113) CVE-2016-2113 samba: Server certificates not validated at client side
CVE-2016-2113 samba: Server certificates not validated at client side
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20160412,repor...
: Security
Depends On: 1322688 1322689 1322690 1322691 1322692 1324807 1325382 1325383 1325384 1325385 1325645 1325649 1325650 1325651 1326453
Blocks: 1311915
  Show dependency treegraph
 
Reported: 2016-02-25 05:08 EST by Adam Mariš
Modified: 2016-04-19 01:28 EDT (History)
15 users (show)

See Also:
Fixed In Version: samba 4.4.1, samba 4.3.7, samba 4.2.10
Doc Type: Bug Fix
Doc Text:
It was found that Samba did not validate SSL/TLS certificates in certain connections. A man-in-the-middle attacker could use this flaw to spoof a Samba server using a specially crafted SSL/TLS certificate.
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Clone Of:
Environment:
Last Closed: 2016-04-19 01:28:46 EDT
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CRM:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---


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Description Adam Mariš 2016-02-25 05:08:15 EST
It was found that while having a support for TLS/SSL for some protocols like ldap and http, certificates are not validated at all. When having a "tls cafile" option, configured certificate is not used to validate the server certificate.

Currently all Samba versions >= 4.0.0 are affected.

Upstream bug:

https://bugzilla.samba.org/show_bug.cgi?id=11752
Comment 5 Huzaifa S. Sidhpurwala 2016-04-11 01:37:21 EDT
Acknowledgements:

Name: the Samba project
Upstream: Stefan Metzmacher (SerNet)
Comment 6 Huzaifa S. Sidhpurwala 2016-04-11 01:45:14 EDT
External Reference:

https://access.redhat.com/articles/2243351
Comment 7 Huzaifa S. Sidhpurwala 2016-04-12 13:11:22 EDT
Public via:

https://www.samba.org/samba/security/CVE-2016-2113.html
Comment 8 Siddharth Sharma 2016-04-12 13:28:35 EDT
Created samba tracking bugs for this issue:

Affects: fedora-all [bug 1326453]
Comment 9 errata-xmlrpc 2016-04-12 17:24:44 EDT
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.6 Extended Update Support
  Red Hat Enterprise Linux 6.5 Advanced Update Support
  Red Hat Enterprise Linux 6.4 Advanced Update Support
  Red Hat Enterprise Linux 6.2 Advanced Update Support

Via RHSA-2016:0620 https://rhn.redhat.com/errata/RHSA-2016-0620.html
Comment 10 errata-xmlrpc 2016-04-12 17:39:50 EDT
This issue has been addressed in the following products:

  Red Hat Gluster Storage 3.1 for RHEL 7
  Red Hat Gluster Storage 3.1 for RHEL 6

Via RHSA-2016:0614 https://rhn.redhat.com/errata/RHSA-2016-0614.html
Comment 11 errata-xmlrpc 2016-04-12 21:07:29 EDT
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7
  Red Hat Enterprise Linux 6

Via RHSA-2016:0612 https://rhn.redhat.com/errata/RHSA-2016-0612.html
Comment 12 errata-xmlrpc 2016-04-12 21:27:25 EDT
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.1 Extended Update Support

Via RHSA-2016:0618 https://rhn.redhat.com/errata/RHSA-2016-0618.html
Comment 13 Fedora Update System 2016-04-13 16:21:33 EDT
samba-4.3.8-0.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
Comment 14 Fedora Update System 2016-04-14 00:21:18 EDT
samba-4.2.11-0.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.
Comment 15 Fedora Update System 2016-04-14 23:17:04 EDT
samba-4.4.2-1.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.

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