Security Bulletin: SSL/TLS side channel timing vulnerability on WebSphere DataPower (CVE-2014-0852)

Summary

DataPower appliances might be subject to side channel timing based attacks.

Vulnerability Details

CVE ID: CVE-2014-0852

DESCRIPTION:

DataPower appliances might be subject to side channel timing based attacks resulting in the decryption of an SSL/TLS secured transaction. The attack can only be performed if the attacker is on the same LAN segment as the DataPower appliance. The attacker has to send several million requests to the DataPower appliance and monitor the response times for each of these messages in order to recover the PreMasterSecret used in the SSL/TLS communication.

CVSS Base Score: 4.3
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/90753&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N)

Affected Products and Versions

Products: WebSphere DataPower SOA Appliances.

Versions: All versions through 4.0.2.15, 5.0.0.17, 6.0.0.9, 6.0.1.5. Note that versions 7.0.0.0 and higher are not affected by this vulnerability.

Hardware models: All platforms - 9004, 9005 and HS22 Blade. (9004 MTM - 9235-xxx; 9005 MTM - 7198 (1U) and 7199 (2U); HS22 - Integration Blade XI50B Type 4195)

Note that DataPower Virtual edition is not affected.

Remediation/Fixes

Fix for 9005 and HS22 platforms are available in versions 5.0.0.16, 6.0.0.8, 6.0.1.4. You can also upgrade to version 7.0.0.0 or higher as they are not affected by this vulnerability.

Fix for 9004 platform is available in versions 5.0.0.16 and 6.0.0.8. Note that due to the hardware limitations of the 9004 platform (which has reached end-of-service), the fix might not completely prevent DataPower against timing based attacks, as there might still be a visible timing latency on the responses on 9004 platforms.

Refer to APAR IT01111 for download links. Customers using DataPower v4.0.2 on extended support, contact customer service.

Workarounds and Mitigations

Secure the LAN environment around DataPower appliances.

Monitor for suspicious activity around your network. Any illicit clients should be denied access to the network immediately.