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             AUSCERT External Security Bulletin Redistribution

          Multiple vulnerabilities in IBM Java Runtime affect IBM
            Rational ClearCase (CVE-2018-12547, CVE-2018-1890)
                               28 June 2019


        AusCERT Security Bulletin Summary

Product:           IBM Rational ClearCase
Publisher:         IBM
Operating System:  AIX
                   Linux variants
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-12547 CVE-2018-1890 

Reference:         ESB-2019.2310

Original Bulletin: 

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Multiple vulnerabilities in IBM Java Runtime affect IBM Rational ClearCase
(CVE-2018-12547, CVE-2018-1890)

Product:             Rational ClearCase
Component:           ClearCase Remote Client
Software version:    9.0,,,,,,,
Operating system(s): AIX, HP-UX, Linux, Solaris, Windows
Reference #:         0885024

Security Bulletin


There are multiple vulnerabilities in IBM Runtime Environment Java Versions 7
and 8, which are used by IBM Rational ClearCase. These issues were disclosed as
part of the IBM Java SDK updates in March 2019.

Vulnerability Details

CVEID: CVE-2018-1890
DESCRIPTION: IBM SDK, Java Technology Edition Version 8 on the AIX platform
uses absolute RPATHs which may facilitate code injection and privilege
elevation by local users.
CVSS Base Score: 5.6
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
152081 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L)

CVEID: CVE-2018-12547
DESCRIPTION: Eclipse OpenJ9 is vulnerable to a buffer overflow, caused by
improper bounds checking by the jio_snprintf()and jio_vsnprintf() functions. By
sending an overly long argument, a remote attacker could overflow a buffer and
execute arbitrary code on the system or cause the application to crash.
CVSS Base Score: 9.8
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
157512 for more information
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Affected Products and Versions

IBM Rational ClearCase version 9 in the following components:

  o CCRC WAN server/CM Server component, when configured to use SSL
  o ClearCase remote client: CCRC/CTE GUI, rcleartool, and CMAPI clients

|           ClearCase version           |               Status                |
|         9.0.1 through         |              Affected               |
|          9.0 through          |              Affected               |


The solution is to install a fix that includes an updated Java Virtual Machine
with fixes for the issues, and to apply fixes for WebSphere Application Server

Client and server fixes

Apply the relevant fixes as listed in the table below.
| Affected Versions |                    Applying the fix                     |
|   9.0.1 through   |Install Rational ClearCase Fix Pack 7 ( for 9.0.1|
|      |                                                         |
|9.0 through|                                                         |

For 8.0 and earlier releases, IBM recommends upgrading to a fixed, supported
version/release/platform of the product.


  o If you use CCRC as an extension offering installed into an Eclipse shell
    (one not provided as part of a ClearCase release), or you use rcleartool or
    CMAPI using a Java Virtual Machine not supplied by IBM as part of Rational
    ClearCase, you should update the Java Virtual Machine that you use to
    include a fix for the above issues. Contact the supplier of your Java
    Virtual Machine and/or the supplier of your Eclipse shell.
  o This fix will not correct the problem for the standalone CCRC product or
    the full CC and CQ products for 32-bit Java running on linux_x86. The
    Eclipse 4.4.2 that is required for these products on linux_x86 32-bit
    crashes when run with the fixed Java. We are continuing to ship the
    previous IBM Java from October 2018 (Java on linux_x86 32-bit (so
    it is still vulnerable to the issues identified in this Security Bulletin).

CCRC WAN server fixes

| Affected Versions |                    Applying the fix                     |
|9.0.0.x            |Apply the appropriate WebSphere Application Server fix   |
|9.0.1.x            |directly to your CCRC WAN server host. No                |
|                   |ClearCase-specific steps are necessary.                  |

 1. Determine the WAS version used by your CCRC WAN server. Navigate to the
    CCRC profile directory (either the profile you specified when installing
    ClearCase, or <ccase-home>/common/ccrcprofile ), then execute the script:
    bin/versionInfo.sh (UNIX) or bin\versionInfo.bat (Windows). The output
    includes a section "IBM WebSphere Application Server". Make note of the
    version listed in this section.
 2. Review the following WAS security bulletin:
    Security Bulletin: Multiple vulnerabilities in IBM Java SDK affects
    WebSphere Application Server January 2019 CPU
    and apply the latest available fix for the version of WAS used for CCRC WAN

Note: there may be newer security fixes for WebSphere Application Server.
Follow the link below (in the section "Get Notified about Future Security
Bulletins") to subscribe to WebSphere product support alerts for additional
Java SDK fixes.

Workarounds and Mitigations

If you require this security fix for the standalone CCRC product or the full CC
product for 32-bit Java running on linux_x86 32-bit, you can switch to the
linux_x86 64-bit offering, which will contain the fix specified in this
Security Bulletin.

Important Note

IBM strongly suggests that all System z customers be subscribed to the System z
Security Portal to receive the latest critical System z security and integrity
service. If you are not subscribed, see the instructions on the System z
Security web site . Security and integrity APARs and associated fixes will be
posted to this portal. IBM suggests reviewing the CVSS scores and applying all
security or integrity fixes as soon as possible to minimize any potential risk.

Change History

20 June 2019: Originally published

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