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

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.