Security Bulletin: Bypass security restrictions in WebSphere Application Server (CVE-2016-0385)

Security Bulletin

Summary

There is a potential bypass security restriction vulnerability in IBM WebSphere Application Server. This will only occur in environments that have the webcontainer custom property HttpSessionIdReuse enabled.

Vulnerability Details

CVEID: CVE-2016-0385
DESCRIPTION: IBM WebSphere Application Server could allow a remote attacker to bypass security restrictions caused by a buffer overflow. This could allow the attacker to view unauthorized data.
CVSS Base Score: 3.1
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/112359 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N)

Affected Products and Versions

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

Liberty
Version 9.0
Version 8.5.5
Version 8.5
Version 8.0
Version 7.0

Remediation/Fixes

The recommended solution is to apply the interim fix, Fix Pack or PTF containing APAR PI60026 for each named product as soon as practical.

For WebSphere Application Server:
For Liberty:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PI60026
--OR--
· Apply Fix Pack 16.0.0.3 or later.

For V9.0.0.0:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PI60026

--OR--
· Apply Fix Pack 9.0.0.1 or later.

For V8.5.0.0 through 8.5.5.9:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PI60026

--OR--
· Apply Fix Pack 8.5.5.10 or later.

For V8.0.0.0 through 8.0.0.12:
· Upgrade to a minimal fix pack levels as required by interim fix and then apply Interim Fix PI60026

--OR--
· Apply Fix Pack 8.0.0.13 or later.

For V7.0.0.0 through 7.0.0.41:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PI60026

--OR--
· Apply Fix Pack 7.0.0.43 or later.

Workarounds and Mitigations

Setting the webcontainer property HttpSessionIdReuse to false will mitigate this issue.

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References

Complete CVSS v2 Guide
On-line Calculator v2

Complete CVSS v3 Guide
On-line Calculator v3

Off

Change History

16 August 2016: original document published
13 September 2016: updated fix pack release dates

*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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Tips

Security Bulletin: Bypass security restrictions in WebSphere Application Server (CVE-2016-0385)