Security Bulletin
Summary
Some versions of Rational DOORS Web Access are shipped with an Apache Tomcat application server that contains security vulnerabilities. Apache Tomcat has been updated to incorporate fixes for these vulnerabilities.
Vulnerability Details
CVEID: CVE-2016-6816
DESCRIPTION: Apache Tomcat is vulnerable to HTTP response splitting attacks, caused by improper validation of user-supplied input. A remote attacker could exploit this vulnerability to inject arbitrary HTTP headers and cause the server to return a split response, once the URL is clicked. This would allow the attacker to perform further attacks, such as Web cache poisoning or cross-site scripting, and possibly obtain sensitive information.
CVSS Base Score: 6.1
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/119158 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)
Affected Products and Versions
Rational DOORS Web Access version 9.6.1.8, 9.6.1.7, 9.6.1.4, 9.6.1.3, 9.6.1.2, 9.6.1.1, 9.6.1.0, 9.6.0.x, 9.5.2.x, 9.5.1.x, 9.5.0.x, 1.5.0.x.
Remediation/Fixes
Upgrade to one of the versions of Apache Tomcat shown in the table below. You can upgrade Apache Tomcat after installing Rational DOORS Web Access.
The following table presents Rational DOORS Web Access versions and the released versions of Apache Tomcat.
| Rational DOORS Web Access | Apache Tomcat |
| 1.4.0.4 | 6.0.53 |
| 1.5.0.x | 6.0.53 |
| 9.5.0.x | 6.0.53 |
| 9.5.1.x | 6.0.53 |
| 9.5.2.x | 6.0.53 |
| 9.6.0.x | 7.0.77 |
| 9.6.1.x | 7.0.77 |
Procedure:
- Download the required version of Apache Tomcat or later core zip file from either the Apache Tomcat 6 or Tomcat 7 Archive download site. For example:
apache-tomcat-6.0.53-windows-x86.zip
apache-tomcat-6.0.53.tar.gz
apache-tomcat-7.0.77-windows-x64.zip
apache-tomcat-7.0.77-windows-x86.zip
apache-tomcat-7.0.77.tar.gz
- Go to the Rational DOORS Web Access installation directory.
For example:
C:\Program Files\IBM\Rational\DOORS Web Access\9.version
- Rename the server directory to server.orig.
- Extract the downloaded Apache Tomcat core compressed file to ./server in the Rational DOORS Web Access installation directory.
- Delete the contents of the ./server/webapps folder
- Copy the following jar files from your ./server.orig/lib directory to ./server/lib
commons-logging-1.1.x.jar
dwa-catalina.jar
log4j-1.2.x.jar
log4j.properties
- Remove the following jar files (only in Apache Tomcat 7) from the ./server/lib directory
tomcat7-websocket.jar
websocket-api.jar
- Copy your ./server.orig/festival directory to ./server/festival.
- Copy the ./server.orig/conf/server.xml file to ./server/conf/server.xml.
- Copy ./server.orig/webapps/*.war to ./server/webapps.
- Optional: Copy any customized files from the ./server.orig directory to ./server.
- UNIX systems only: Run the ./configure-festival.sh command, as described in the help topic Installing the web access server and the web access broker on Linux or Solaris systems.
Workarounds and Mitigations
None
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References
Acknowledgement
None
Change History
19 May 2017: Original copy 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
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
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Document Information
Modified date:
17 June 2018
UID
swg22003660