IBM Support

Security Bulletin: WebSphere Application Server may have insecure file permissions (CVE-2017-1382)

Security Bulletin


Summary

WebSphere Application Server may have insecure file permissions after custom startup scripts are run. The custom startup script will not pull the umask from the server.xml. This may cause some log files to have different permissions then expected.

Vulnerability Details

CVEID: CVE-2017-1382
DESCRIPTION:
IBM WebSphere Application Server might create files using the default permissions instead of the customized permissions when custom startup scripts are used. A local attacker could exploit this to gain access to files with an unknown impact.
CVSS Base Score: 5.1
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/127153 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)

Affected Products and Versions

This vulnerability affects the following versions and releases of IBM WebSphere Application Server traditional:

  • Version 9.0
  • Version 8.5
  • Version 8.0
  • Version 7.0

Remediation/Fixes

If you have a umask defined in your server.xml and you use custom startup scripts, you should verify that your log files have the correct permsissions that you expect. You will need to manually change these files permissions if they are not as expected. The interim fix below will only prevent this from happening in the future. It will not change your current log file permissions.


The recommended solution is to apply the interim fix, Fix Pack or PTF containing APAR PI79343 for each named product as soon as practical.

For WebSphere Application Server traditional and WebSphere Application Server Hypervisor Edition:

For V9.0.0.0 through 9.0.0.4:

· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PI79343
--OR--
· Apply Fix Pack 9.0.0.5 or later.

For V8.5.0.0 through 8.5.5.11:

· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PI79343
--OR--
· Apply Fix Pack 8.5.5.12 or later.

For V8.0.0.0 through 8.0.0.13:
· Upgrade to a minimal fix pack levels as required by interim fix and then apply Interim Fix PI79343

--OR--
· Apply Fix Pack 8.0.0.14 or later.

For V7.0.0.0 through 7.0.0.43:
· Upgrade to a minimal fix pack levels as required by interim fix and then apply Interim Fix PI79343

--OR--
· Apply Fix Pack 7.0.0.45 or later.

Get Notified about Future Security Bulletins

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.

References

Complete CVSS v3 Guide
On-line Calculator v3

Related information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

20 July 2017: 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.

Related information

A Japanese translation is available

Cross reference information
Segment Product Component Platform Version Edition
Application Servers WebSphere Application Server Hypervisor Edition

Document information

More support for: WebSphere Application Server

Software version: 7.0, 8.0, 8.5, 9.0

Operating system(s): AIX, HP-UX, IBM i, Linux, Solaris, Windows, z/OS

Software edition: Base, Developer, Enterprise, Network Deployment

Reference #: 2004785

Modified date: 30 October 2017