Red Hat Security Advisory 2017-1272-01 - Samba is an open-source implementation of the Server Message Block or Common Internet File System protocol, which allows PC-compatible machines to share files, printers, and other information. Security Fix: A remote code execution flaw was found in Samba. A malicious authenticated samba client, having write access to the samba share, could use this flaw to execute arbitrary code as root.
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Red Hat Security Advisory
Synopsis: Important: samba3x security update
Advisory ID: RHSA-2017:1272-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:1272
Issue date: 2017-05-24
CVE Names: CVE-2017-7494
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1. Summary:
An update for samba3x is now available for Red Hat Enterprise Linux 5
Extended Lifecycle Support.
Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.
2. Relevant releases/architectures:
Red Hat Enterprise Linux Server (v. 5 ELS) - i386, s390x, x86_64
3. Description:
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 remote code execution flaw was found in Samba. A malicious
authenticated samba client, having write access to the samba share, could
use this flaw to execute arbitrary code as root. (CVE-2017-7494)
Red Hat would like to thank the Samba project for reporting this issue.
Upstream acknowledges steelo as the original reporter.
4. 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.
5. Bugs fixed (https://bugzilla.redhat.com/):
1450347 - CVE-2017-7494 samba: Loading shared modules from any path in the system leading to RCE
6. Package List:
Red Hat Enterprise Linux Server (v. 5 ELS):
Source:
samba3x-3.6.23-14.el5_11.src.rpm
i386:
samba3x-3.6.23-14.el5_11.i386.rpm
samba3x-client-3.6.23-14.el5_11.i386.rpm
samba3x-common-3.6.23-14.el5_11.i386.rpm
samba3x-debuginfo-3.6.23-14.el5_11.i386.rpm
samba3x-doc-3.6.23-14.el5_11.i386.rpm
samba3x-domainjoin-gui-3.6.23-14.el5_11.i386.rpm
samba3x-swat-3.6.23-14.el5_11.i386.rpm
samba3x-winbind-3.6.23-14.el5_11.i386.rpm
samba3x-winbind-devel-3.6.23-14.el5_11.i386.rpm
s390x:
samba3x-3.6.23-14.el5_11.s390x.rpm
samba3x-client-3.6.23-14.el5_11.s390x.rpm
samba3x-common-3.6.23-14.el5_11.s390x.rpm
samba3x-debuginfo-3.6.23-14.el5_11.s390.rpm
samba3x-debuginfo-3.6.23-14.el5_11.s390x.rpm
samba3x-doc-3.6.23-14.el5_11.s390x.rpm
samba3x-domainjoin-gui-3.6.23-14.el5_11.s390x.rpm
samba3x-swat-3.6.23-14.el5_11.s390x.rpm
samba3x-winbind-3.6.23-14.el5_11.s390.rpm
samba3x-winbind-3.6.23-14.el5_11.s390x.rpm
samba3x-winbind-devel-3.6.23-14.el5_11.s390.rpm
samba3x-winbind-devel-3.6.23-14.el5_11.s390x.rpm
x86_64:
samba3x-3.6.23-14.el5_11.x86_64.rpm
samba3x-client-3.6.23-14.el5_11.x86_64.rpm
samba3x-common-3.6.23-14.el5_11.x86_64.rpm
samba3x-debuginfo-3.6.23-14.el5_11.i386.rpm
samba3x-debuginfo-3.6.23-14.el5_11.x86_64.rpm
samba3x-doc-3.6.23-14.el5_11.x86_64.rpm
samba3x-domainjoin-gui-3.6.23-14.el5_11.x86_64.rpm
samba3x-swat-3.6.23-14.el5_11.x86_64.rpm
samba3x-winbind-3.6.23-14.el5_11.i386.rpm
samba3x-winbind-3.6.23-14.el5_11.x86_64.rpm
samba3x-winbind-devel-3.6.23-14.el5_11.i386.rpm
samba3x-winbind-devel-3.6.23-14.el5_11.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
7. References:
https://access.redhat.com/security/cve/CVE-2017-7494
https://access.redhat.com/security/updates/classification/#important
https://www.samba.org/samba/security/CVE-2017-7494.html
https://access.redhat.com/security/vulnerabilities/3034621
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2017 Red Hat, Inc.
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