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

IBM SECURITY ADVISORY

First Issued: Fri Dec 14 12:09:04 CST 2018

The most recent version of this document is available here:

http://aix.software.ibm.com/aix/efixes/security/itds_advisory2.asc
https://aix.software.ibm.com/aix/efixes/security/itds_advisory2.asc
ftp://aix.software.ibm.com/aix/efixes/security/itds_advisory2.asc

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

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

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
https://vulners.com/cve/CVE-2018-1388
https://vulners.com/cve/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
https://vulners.com/cve/CVE-2018-1427
https://vulners.com/cve/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
https://vulners.com/cve/CVE-2018-1426
https://vulners.com/cve/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
https://vulners.com/cve/CVE-2016-0702
https://vulners.com/cve/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
https://vulners.com/cve/CVE-2018-1447
https://vulners.com/cve/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 6.3.1:    Less than 6.3.1.24
    For ISDS 6.4.0:    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:

    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%2BSystems&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%2BSystems&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%2BSystems&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%2BSystems&product=ibm/Tivoli/IBM+Security+Directory+Server&release=6.4.0.11&platform=AIX&function=all

WORKAROUNDS AND MITIGATIONS:

None.

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

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REFERENCES:

Complete CVSS v2 Guide:
    http://www.first.org/cvss/v2/guide
On-line Calculator v2:
    http://nvd.nist.gov/CVSS-v2-Calculator
Complete CVSS v3 Guide:
    http://www.first.org/cvss/user-guide
On-line Calculator v3:
    http://www.first.org/cvss/calculator/3.0

RELATED INFORMATION:

Security Bulletin: Vulnerabilities in GSKit affect IBM Tivoli Directory
Server and IBM Security Directory Server for AIX
    http://www-01.ibm.com/support/docview.wss?uid=ibm10788069

ACKNOWLEDGEMENTS:

None.

CHANGE HISTORY:

First Issued: Fri Dec 14 12:09:04 CST 2018

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

*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.