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Red Hat Enterprise Linux 6: RHSA-2017-3278 Important: Samba4 Security Fix

red hat
Calendar Grey November 29, 2017
Scroller Redhat
A significant samba4 upgrade tackles severe vulnerabilities in Ubuntu Server, improving overall security measures.
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 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 security fix important 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 Desktop (v. 6):
Source: samba4-4.2.10-12.el6_9.src.rpm
i386: samba4-4.2.10-12.el6_9.i686.rpm samba4-client-4.2.10-12.el6_9.i686.rpm samba4-common-4.2.10-12.el6_9.i686.rpm samba4-dc-4.2.10-12.el6_9.i686.rpm samba4-dc-libs-4.2.10-12.el6_9.i686.rpm samba4-debuginfo-4.2.10-12.el6_9.i686.rpm samba4-devel-4.2.10-12.el6_9.i686.rpm samba4-libs-4.2.10-12.el6_9.i686.rpm samba4-pidl-4.2.10-12.el6_9.i686.rpm samba4-python-4.2.10-12.el6_9.i686.rpm samba4-test-4.2.10-12.el6_9.i686.rpm samba4-winbind-4.2.10-12.el6_9.i686.rpm samba4-winbind-clients-4.2.10-12.el6_9.i686.rpm samba4-winbind-krb5-locator-4.2.10-12.el6_9.i686.rpm
x86_64: samba4-4.2.10-12.el6_9.x86_64.rpm samba4-client-4.2.10-12.el6_9.x86_64.rpm samba4-common-4.2.10-12.el6_9.x86_64.rpm samba4-dc-4.2.10-12.el6_9.x86_64.rpm samba4-dc-libs-4.2.10-12.el6_9.x86_64.rpm samba4-debuginfo-4.2.10-12.el6_9.x86_64.rpm samba4-devel-4.2.10-12.el6_9.x86_64.rpm samba4-libs-4.2.10-12.el6_9.x86_64.rpm samba4-pidl-4.2.10-12.el6_9.x86_64.rpm samba4-python-4.2.10-12.el6_9.x86_64.rpm samba4-test-4.2.10-12.el6_9.x86_64.rpm samba4-winbind-4.2.10-12.el6_9.x86_64.rpm samba4-winbind-clients-4.2.10-12.el6_9.x86_64.rpm samba4-winbind-krb5-locator-4.2.10-12.el6_9.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2017:3278-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:3278
Issue date: 2017-11-29

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 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 security fix important memory disclosure use-after-free

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

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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