ESB-2018.1498 - [Win][Linux][HP-UX][Solaris][AIX] IBM HTTP Server: Multiple vulnerabilities 2018-05-16

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1498
                     GSKit patched in IBM HTTP Server
                                16 May 2018

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

Product:           IBM HTTP Server
Publisher:         IBM
Operating System:  AIX
                   HP-UX
                   Linux variants
                   Solaris
                   Windows
                   z/OS
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-2017-3736 CVE-2017-3732 CVE-2016-0705
                   CVE-2016-0702  

Reference:         ESB-2016.1485
                   ESB-2016.0543.2

Original Bulletin: 
   http://www.ibm.com/support/docview.wss?uid=swg22015347

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Security Bulletin: Multiple vulnerabilities GSKit bundled with IBM HTTP Server

Security Bulletin

Document information
Software version: 7.0, 8.0, 8.5, 9.0
Operating system(s): AIX, HP-UX, Linux, Solaris, Windows, z/OS
Software edition: Advanced, Base, Enterprise, Network Deployment, Single Server
Reference #: 2015347

Summary

There are multiple vulnerabilities in the GSKit component that is included in
the IBM HTTP Server used by WebSphere Application Server.

Vulnerability Details

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-2016-0705
DESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by a
double-free error when parsing DSA private keys. An attacker could exploit this
vulnerability to corrupt memory and cause a denial of service.
CVSS Base Score: 3.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
111140 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID: CVE-2017-3732
DESCRIPTION: OpenSSL could allow a remote attacker to obtain sensitive
information, caused by a carry propagating bug in the x86_64 Montgomery
squaring procedure. An attacker could exploit this vulnerability to obtain
information about the private key.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
121313 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:N/A:N)

CVEID: CVE-2017-3736
DESCRIPTION: OpenSSL could allow a remote attacker to obtain sensitive
information, caused by a carry propagation flaw in the x86_64 Montgomery
squaring function bn_sqrx8x_internal(). An attacker with online access to an
unpatched system could exploit this vulnerability to obtain information about
the private key.
CVSS Base Score: 5.9
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
134397 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:N/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-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

These vulnerabilities affect the following versions and releases of IBM HTTP
Server (powered by Apache) component in all editions of WebSphere Application
Server and bundling products.

  * Version 9.0
  * Version 8.5
  * Version 8.0
  * Version 7.0

Remediation/Fixes

NOTE: After applying the interim fixes or fixpack levels as noted below, please
refer to this document http://publib.boulder.ibm.com/httpserv/ihsdiag/
restash.html for information concerning password res-stashing. It is advised
that you re-stash your password due to CVE-2018-1447 after you apply the
interim fixes.


For V9.0.0.0 through 9.0.0.7:
- - Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix PI94222  
- --OR--
- - Apply Fix Pack 9.0.0.8 or later (targeted availability 22 June 2018).


For V8.5.0.0 through 8.5.5.13:

- - Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix PI94222

- --OR--
- - Apply Fix Pack 8.5.5.14 (targeted availability 20 August 2018).


For V8.0.0.0 through 8.0.0.14:
- - Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix PI94222


For V7.0.0.0 through 7.0.0.43:
- - Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix  PI91913  
- --OR--
- - Apply Fix Pack 7.0.0.45 or later.

WebSphere Application Server V7 and V8 are no longer in full support; IBM
recommends upgrading to a fixed, supported version/release/platform of the
product.

Change History

15 May 2018: original document 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.
Modified date: 15 May 2018

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