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Red Hat Enterprise Linux 7: RHSA-2017-3260-01 Important Samba Fix

red hat
Calendar Grey November 27, 2017
Scroller Redhat
Crucial samba security patch for Red Hat Enterprise Linux addresses serious vulnerabilities from potential attack vectors.
An update for samba is now available for Red Hat Enterprise Linux 7

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) 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):
* A use-after-free flaw was found in the way samba servers handled certain SMB1 requests. An unauthenticated attacker could send specially-crafted SMB1 requests to cause the server to crash or execute arbitrary code. (CVE-2017-14746)
* A memory disclosure flaw was found in samba. An attacker could retrieve parts of server memory, which could contain potentially sensitive data, by sending specially-crafted requests to the samba server. (CVE-2017-15275)
Red Hat would like to thank the Samba project for reporting these issues. Upstream acknowledges Yihan Lian and Zhibin Hu (Qihoo 360 GearTeam) as the original reporter of CVE-2017-14746; and Volker Lendecke (SerNet and the Samba Team) as the original reporter of CVE-2017-15275.

Topics%20covered

Topics Covered

security advisory red hat samba important Denial of Service memory disclosure use-after-free

References

https://access.redhat.com/security/cve/CVE-2017-14746 https://access.redhat.com/security/cve/CVE-2017-15275 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: samba-4.6.2-12.el7_4.src.rpm
noarch: samba-common-4.6.2-12.el7_4.noarch.rpm
x86_64: libsmbclient-4.6.2-12.el7_4.i686.rpm libsmbclient-4.6.2-12.el7_4.x86_64.rpm libwbclient-4.6.2-12.el7_4.i686.rpm libwbclient-4.6.2-12.el7_4.x86_64.rpm samba-client-4.6.2-12.el7_4.x86_64.rpm samba-client-libs-4.6.2-12.el7_4.i686.rpm samba-client-libs-4.6.2-12.el7_4.x86_64.rpm samba-common-libs-4.6.2-12.el7_4.x86_64.rpm samba-common-tools-4.6.2-12.el7_4.x86_64.rpm samba-debuginfo-4.6.2-12.el7_4.i686.rpm samba-debuginfo-4.6.2-12.el7_4.x86_64.rpm samba-krb5-printing-4.6.2-12.el7_4.x86_64.rpm samba-libs-4.6.2-12.el7_4.i686.rpm samba-libs-4.6.2-12.el7_4.x86_64.rpm samba-winbind-4.6.2-12.el7_4.x86_64.rpm samba-winbind-clients-4.6.2-12.el7_4.x86_64.rpm samba-winbind-modules-4.6.2-12.el7_4.i686.rpm samba-winbind-modules-4.6.2-12.el7_4.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
noarch: samba-pidl-4.6.2-12.el7_4.noarch.rpm
x86_64: libsmbclient-devel-4.6.2-12.el7_4.i686.rpm libsmbclient-devel-4.6.2-12.el7_4.x86_64.rpm libwbclient-devel-4.6.2-12.el7_4.i686.rpm libwbclient-devel-4.6.2-12.el7_4.x86_64.rpm samba-4.6.2-12.el7_4.x86_64.rpm samba-dc-4.6.2-12.el7_4.x86_64.rpm samba-dc-libs-4.6.2-12.el7_4.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2017:3260-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:3260
Issue date: 2017-11-27

Topic

An update for samba is now available for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory red hat samba important Denial of Service memory disclosure use-after-free

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Resilient Storage (v. 7) - ppc64le, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - noarch, x86_64

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, noarch, ppc64le

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) - aarch64, noarch, ppc64le

Bugs Fixed

1511899 - CVE-2017-14746 samba: Use-after-free in processing SMB1 requests

1512465 - CVE-2017-15275 samba: Server heap-memory disclosure

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