Security Bulletin: Multiple security vulnerabilities affect Liberty for Java for IBM Bluemix

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. There is a potential denial of service with IBM WebSphere Application Server when using SIP services. IBM WebSphere Application Server Liberty could allow a remote attacker to conduct phishing attacks, caused by an open redirect vulnerability. An attacker could exploit this vulnerability to redirect a victim to arbitrary Web sites. IBM WebSphere Application Server Liberty is vulnerable to cross-site scripting in OpenID Connect clients caused by improper validation of input. A remote attacker could exploit this vulnerability using a specially-crafted URL to execute script in a victim’s Web browser within the security context of the hosting Web site, once the URL is clicked. An attacker could use this vulnerability to steal the victim’s cookie-based authentication credentials. There is an Information Disclosure Vulnerability in IBM WebSphere Application Server Liberty. Apache Commons Fileupload vulnerability affects WebSphere Application Server. There is a potential information disclosure in WebSphere Application Server.

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)

CVEID: CVE-2016-2960**
DESCRIPTION:** IBM WebSphere Application Server could be vulnerable to a denial of service when using SIP services. A remote attacker could cause a denial of service with specially-crafted SIP messages.
CVSS Base Score: 3.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/113805 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID: CVE-2016-3040**
DESCRIPTION:** IBM WebSphere Application Server Liberty could allow a remote attacker to conduct phishing attacks, caused by an open redirect vulnerability. An attacker could exploit this vulnerability to redirect a victim to arbitrary Web sites.
CVSS Base Score: 6.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/114636 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N)

CVEID: CVE-2016-3042**
DESCRIPTION:** IBM WebSphere Application Server - Liberty is vulnerable to cross-site scripting in OpenID Connect clients. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session.
CVSS Base Score: 5.4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/114638 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N)

CVEID: CVE-2016-0378**
DESCRIPTION:** IBM WebSphere Application Server Liberty could allow a remote attacker to obtain sensitive information caused by improper handling of exceptions when a default error page does not exist.
CVSS Base Score: 3.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/112240 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)

CVEID: CVE-2016-3092**
DESCRIPTION:** Apache Tomcat is vulnerable to a denial of service, caused by an error in the Apache Commons FileUpload component. By sending file upload requests, an attacker could exploit this vulnerability to cause the server to become unresponsive.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/114336 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID: CVE-2016-5986**
DESCRIPTION:** IBM WebSphere Application Server and IBM WebSphere Application Server Liberty could allow a remote attacker to obtain sensitive information, caused by the improper handling of responses under certain conditions. An attacker could exploit this vulnerability to gain server identification information.
CVSS Base Score: 3.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/116556 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)

Affected Products and Versions

This vulnerability affects all versions of Liberty for Java in IBM Bluemix up to and including v3.2.

Remediation/Fixes

To upgrade to Liberty for Java v3.3-20160912-1729 or higher, you must re-stage or re-push your application. To check which version of the Liberty for Java runtime your Bluemix application is using, navigate to the “Files” menu item for your application through the Bluemix UI. In the “logs” directory, check the “staging_task.log”.

You can also find this file through the command-line Cloud Foundry client by running the following command:

cf files <appname> logs/staging_task.log

You can see

-----> Liberty Buildpack Version: _________

To re-stage your application using the command-line Cloud Foundry client, use the following command:

cf restage <appname>

To re-push your application using the command-line Cloud Foundry client, use the following command:

cf push <appname>

Workarounds and Mitigations

none