Operating System:

[Linux]

Published:

28 February 2019

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0624
 IBM Security Bulletin: Multiple Samba vulnerabilities affect IBM Spectrum
        Protect Plus (CVE-2018-1139, CVE-2018-1140, CVE-2018-10858,
                      CVE-2018-10918, CVE-2018-10919)
                             28 February 2019

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           IBM Spectrum Protect Plus
Publisher:         IBM
Operating System:  Linux variants
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
                   Access Confidential Data        -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-10919 CVE-2018-10918 CVE-2018-10858
                   CVE-2018-1140 CVE-2018-1139 

Reference:         ASB-2018.0137
                   ESB-2018.2617
                   ESB-2018.2354
                   ESB-2018.2349

Original Bulletin: 
   http://www.ibm.com/support/docview.wss?uid=ibm10796402

- --------------------------BEGIN INCLUDED TEXT--------------------

Multiple Samba vulnerabilities affect IBM Spectrum Protect Plus (CVE-2018-1139,
CVE-2018-1140, CVE-2018-10858, CVE-2018-10918, CVE-2018-10919)

Product:             IBM Spectrum Protect Plus

Software version:    10.1.0, 10.1.1, 10.1.2

Operating system(s): Linux

Reference #:         0796402

Security Bulletin

Summary

There are multiple security vulnerabilities in Samba that affect IBM Spectrum
Protect Plus. These vulnerabilities may result in potential information
disclosure, denial of service, or execution of arbitrary code on the system.

Vulnerability Details

CVEID: CVE-2018-1139
DESCRIPTION: Samba could allow a remote attacker to obtain information, caused
by the use of weak NTLMv1 authentication over an SMB1 transport. An attacker
could exploit this vulnerability using man-in-the-middle techniques to read
details passed between the samba server and client.
CVSS Base Score: 5.4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
148707 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)

CVEID: CVE-2018-1140
DESCRIPTION: Samba is vulnerable to a denial of service, caused by missing NULL
pointer checks on some of the input parameters to the implementation of LDP
database. If Samba is in an Active Directory Domain Controller configuration, a
remote attacker could exploit this vulnerability to cause the LDAP server and
DNS server to crash.
CVSS Base Score: 6.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
148706 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2018-10858
DESCRIPTION: Samba is vulnerable to a heap-based buffer overflow, caused by
improper bounds checking by libsmbclient. By sending an overly long filename, a
remote attacker could overflow a buffer and execute arbitrary code on the
system or cause the application to crash.
CVSS Base Score: 7.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
148710 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID: CVE-2018-10918
DESCRIPTION: Samba is vulnerable to a denial of service, caused by a NULL
pointer dereference when checking database outputs from the LDB database layer.
If Samba is in an Active Directory Domain Controller configuration, a remote
attacker could exploit this vulnerability to cause the "samba" process to
crash.
CVSS Base Score: 5.2
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
148709 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:A/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H)

CVEID: CVE-2018-10919
DESCRIPTION: Samba could allow a remote attacker to obtain information, caused
by missing access control checks in the Active Directory LDAP server. An
attacker could exploit this vulnerability using authenticated LDAP search
expressions to obtain confidential attribute values.
CVSS Base Score: 4.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
148708 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

Affected Products and Versions

IBM Spectrum Protect Plus versions 10.1.0 through 10.1.2.

Remediation/Fixes

+---------------+-------------+---------+-------------------------------------------------------------------------------+
|IBM Spectrum   |             |Platform |                                                                               |
|Protect Plus   |First Fixing |         |                                                                               |
|Release        |VRM Level    |         |Link to Fix / Fix Availability Target                                          |
+---------------+-------------+---------+-------------------------------------------------------------------------------+
|10.1           |10.1.3       |Linux    |https://www.ibm.com/support/docview.wssuid=ibm10743897                        |
+---------------+-------------+---------+-------------------------------------------------------------------------------+

Workarounds and Mitigations

None.

Reference

Complete CVSS v3 Guide
On-line Calculator v3

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

26 February 2019 - original version published

*The CVSS Environment Score is customer environment specific and will
ultimately impact the Overall CVSS Score. Customers can evaluate the impact of
this vulnerability in their environments by accessing the links in the
Reference section of this Security Bulletin.

Disclaimer

According to the Forum of Incident Response and Security Teams (FIRST), the
Common Vulnerability Scoring System (CVSS) is an "industry open standard
designed to convey vulnerability severity and help to determine urgency and
priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY
OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF
ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

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