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centosCentOS ProjectCESA-2017:2790
HistorySep 21, 2017 - 5:20 p.m.

ctdb, libsmbclient, libwbclient, samba security update

2017-09-2117:20:54
CentOS Project
lists.centos.org
49

7.4 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

5.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:P/A:N

0.651 Medium

EPSS

Percentile

97.9%

JSON

CentOS Errata and Security Advisory CESA-2017:2790

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):

  • It was found that samba did not enforce “SMB signing” when certain configuration options were enabled. A remote attacker could launch a man-in-the-middle attack and retrieve information in plain-text. (CVE-2017-12150)

  • A flaw was found in the way samba client used encryption with the max protocol set as SMB3. The connection could lose the requirement for signing and encrypting to any DFS redirects, allowing an attacker to read or alter the contents of the connection via a man-in-the-middle attack. (CVE-2017-12151)

  • An information leak flaw was found in the way SMB1 protocol was implemented by Samba. A malicious client could use this flaw to dump server memory contents to a file on the samba share or to a shared printer, though the exact area of server memory cannot be controlled by the attacker. (CVE-2017-12163)

Red Hat would like to thank the Samba project for reporting CVE-2017-12150 and CVE-2017-12151 and Yihan Lian and Zhibin Hu (Qihoo 360 GearTeam), Stefan Metzmacher (SerNet), and Jeremy Allison (Google) for reporting CVE-2017-12163. Upstream acknowledges Stefan Metzmacher (SerNet) as the original reporter of CVE-2017-12150 and CVE-2017-12151.

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2017-September/084708.html

Affected packages:
ctdb
ctdb-tests
libsmbclient
libsmbclient-devel
libwbclient
libwbclient-devel
samba
samba-client
samba-client-libs
samba-common
samba-common-libs
samba-common-tools
samba-dc
samba-dc-libs
samba-devel
samba-krb5-printing
samba-libs
samba-pidl
samba-python
samba-test
samba-test-libs
samba-vfs-glusterfs
samba-winbind
samba-winbind-clients
samba-winbind-krb5-locator
samba-winbind-modules

Upstream details at:
https://access.redhat.com/errata/RHSA-2017:2790

OSVersionArchitecturePackageVersionFilename
CentOS7x86_64ctdb< 4.6.2-11.el7_4ctdb-4.6.2-11.el7_4.x86_64.rpm
CentOS7x86_64ctdb-tests< 4.6.2-11.el7_4ctdb-tests-4.6.2-11.el7_4.x86_64.rpm
CentOS7i686libsmbclient< 4.6.2-11.el7_4libsmbclient-4.6.2-11.el7_4.i686.rpm
CentOS7x86_64libsmbclient< 4.6.2-11.el7_4libsmbclient-4.6.2-11.el7_4.x86_64.rpm
CentOS7i686libsmbclient-devel< 4.6.2-11.el7_4libsmbclient-devel-4.6.2-11.el7_4.i686.rpm
CentOS7x86_64libsmbclient-devel< 4.6.2-11.el7_4libsmbclient-devel-4.6.2-11.el7_4.x86_64.rpm
CentOS7i686libwbclient< 4.6.2-11.el7_4libwbclient-4.6.2-11.el7_4.i686.rpm
CentOS7x86_64libwbclient< 4.6.2-11.el7_4libwbclient-4.6.2-11.el7_4.x86_64.rpm
CentOS7i686libwbclient-devel< 4.6.2-11.el7_4libwbclient-devel-4.6.2-11.el7_4.i686.rpm
CentOS7x86_64libwbclient-devel< 4.6.2-11.el7_4libwbclient-devel-4.6.2-11.el7_4.x86_64.rpm
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7.4 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

5.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:P/A:N

0.651 Medium

EPSS

Percentile

97.9%

JSON
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