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Security Bulletin: IBM Forms Experience Builder vulnerable to CSRF when configured with non default settings (CVE-2016-2884)

Security Bulletin


Summary

A cross-site request forgery attack is possible when configured with non default settings, caused by improper validation of user-supplied input.

Vulnerability Details

CVEID: CVE-2016-2884

DESCRIPTION: IBM Forms Experience Builder is vulnerable to cross-site request forgery, when configured with non-default settings, caused by improper validation of user-supplied input. By persuading an authenticated user to visit a malicious web site, a remote attacker could send a malformed HTTP request. An attacker could exploit this vulnerability to perform cross-site scripting attacks, web cache poisoning, and other malicious activities.

CVSS Base Score: 7.1
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/112864 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H)

Affected Products and Versions

IBM Forms Experience Builder 8.5
IBM Forms Experience Builder 8.5.1
IBM Forms Experience Builder 8.6.x

Remediation/Fixes

Applying the following fix will resolve the issue, but can impact any application that uses the Forms Experience Builder REST API (both Data and Application management.)

Product VRMF APAR Remediation
IBM Forms Experience Builder 8.5.0.* LO89686 To receive the fix for these versions, contact IBM Support.
IBM Forms Experience Builder 8.5.1.* LO89686
IBM Forms Experience Builder 8.6.* LO89686 Download and Install 8.6.3.1

NOTE: For users with applications that utilize the REST APIs, the ability to temporarily revert the behaviour exists by setting the ibm.nitro.NitroConfig.ProtectSensitiveActions configuration option to false. This is not recommended as it can leave the system open to this vulnerability.

To remediate applications that use the Forms Experience Builder REST API, you must add a randomly generated, difficult to guess single-use numerical value as part of the header. See Table 1 in the Data access REST API and Application management REST API for specific examples.

Workarounds and Mitigations

None

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References

Related information

Change History

1 August 2016 : Original version created.

*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.

Document information

More support for: IBM Forms Experience Builder

Software version: 8.5, 8.5.0.1, 8.5.1, 8.6

Operating system(s): AIX, Linux, Windows

Reference #: 1987252

Modified date: 03 August 2016