ESB-2018.3891 - [AIX] IBM AIX: Multiple vulnerabilities 2018-12-17

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.3891
        Vulnerabilities in GSKit affect IBM Tivoli Directory Server
                 and IBM Security Directory Server for AIX
                             17 December 2018

===========================================================================

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

Product:           IBM AIX
Publisher:         IBM
Operating System:  AIX
Impact/Access:     Access Privileged Data -- Remote/Unauthenticated
                   Denial of Service      -- Remote/Unauthenticated
                   Reduced Security       -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-1447 CVE-2018-1427 CVE-2018-1426
                   CVE-2018-1388 CVE-2016-0702 

Reference:         ASB-2017.0219
                   ASB-2016.0074
                   ASB-2016.0042
                   ESB-2018.2962

Original Bulletin: 
   http://www.ibm.com/support/docview.wss?uid=ibm10788069

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Security Bulletin: Vulnerabilities in GSKit affect IBM Tivoli Directory Server
and IBM Security Directory Server for AIX


Security Bulletin


Document information

More support for: AIX family

Software version: 5.3, 6.1, 7.1, 7.2

Operating system(s): AIX

Reference #: 0788069

Modified date: 14 December 2018

Summary

There are multiple vulnerabilities in GSKit that affect IBM Tivoli Directory
Server and IBM Security Directory Server for AIX.

Vulnerability Details

CVEID: CVE-2018-1388
DESCRIPTION: GSKit V7 may disclose side channel information via discrepencies
between valid and invalid PKCS#1 padding.
CVSS Base Score: 9.1
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/138212 for the current
score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N)

CVEID: CVE-2018-1427
DESCRIPTION: IBM GSKit contains several enviornment variables that a local
attacker could overflow and cause a denial of service.
CVSS Base Score: 6.2
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/139072 for the current
score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2018-1426
DESCRIPTION: IBM GSKit duplicates the PRNG state across fork() system calls
when multiple ICC instances are loaded which could result in duplicate Session
IDs and a risk of duplicate key material.
CVSS Base Score: 7.4
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/139071 for the current
score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N)

CVEID: CVE-2016-0702
DESCRIPTION: OpenSSL could allow a local attacker to obtain sensitive
information, caused by a side-channel attack against a system based on the
Intel Sandy-Bridge microarchitecture. An attacker could exploit this
vulnerability to recover RSA keys.
CVSS Base Score: 2.9
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/111144 for the current
score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)

CVEID: CVE-2018-1447
DESCRIPTION: The GSKit CMS KDB logic fails to salt the hash function resulting
in weaker than expected protection of passwords. A weak password may be
recovered. Note: After update the customer should change password to ensure the
new password is stored more securely. Products should encourage customers to
take this step as a high priority action.
CVSS Base Score: 5.1
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/139972 for the current
score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)

Affected Products and Versions

AIX 5.3, 6.1, 7.1, 7.2
VIOS 2.2.x

The following fileset levels (VRMF) are vulnerable, if the respective IBM
Tivoli Directory Server (ITDS) or IBM Security Directory Server (ISDS) version
is installed:
        For ITDS 6.2.0:    Less than 6.2.0.56
        For ITDS 6.3.0:    Less than 6.3.0.49
        For ISDS 6.3.0:    Less than 6.3.1.24
        For ISDS 6.3.0:    Less than 6.4.0.16

Note: To find out whether the affected ITDS or ISDS filesets are installed on
your systems, refer to the lslpp command found in AIX user's guide.

Example:  lslpp -L | grep -i itds

Remediation/Fixes

Note: Recommended remediation is to always install the most recent package
available for the respective IBM Tivoli Directory Server or IBM Security
Directory Server version.

IBM Tivoli Directory Server 6.2.0, 6.2.0.56 or later:
    https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=Security+Systems&product=ibm/Tivoli/Tivoli+Directory+Server&release=6.2.0.52&platform=AIX&function=all

IBM Tivoli Directory Server 6.3.0, 6.3.0.49 or later:
    https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=Security+Systems&product=ibm/Tivoli/Tivoli+Directory+Server&release=6.3.0.45&platform=AIX&function=all

IBM Security Directory Server 6.3.1, 6.3.1.24 or later:
    https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=Security+Systems&product=ibm/Tivoli/IBM+Security+Directory+Server&release=6.3.1.20&platform=AIX&function=all

IBM Security Directory Server 6.4.0, 6.4.0.16 or later:
    https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=Security+Systems&product=ibm/Tivoli/IBM+Security+Directory+Server&release=6.4.0.11&platform=AIX&function=all

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

AIX Security Bulletin (ASCII format)

Acknowledgement

None.

*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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