Security Bulletin
Summary
SSL cipher suites using non-Elliptic Curve Diffie-Hellman key exchange algorithms with key sizes of less than 1024 are vulnerable to man in the middle attacks. Previous versions of the IBM UrbanCode Deploy server left these cipher suites enabled.
Vulnerability Details
CVE ID: CVE-2015-4000
Description: The TLS protocol could allow a remote attacker to obtain sensitive information, caused by the failure to properly convey a DHE_EXPORT cipher suite choice. An attacker could exploit this vulnerability using man-in-the-middle techniques to force a downgrade to 512-bit export-grade cipher. Successful exploitation could allow an attacker to recover the session key as well as modify the contents of the traffic.
This vulnerability is commonly referred to as "Logjam".
CVSS Base Score: 4.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/103294 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
IBM UrbanCode Deploy 6.0, 6.0.1, 6.0.1.1, 6.0.1.2, 6.0.1.3, 6.0.1.4, 6.0.1.5, 6.0.1.6, 6.0.1.7, 6.0.1.8, 6.1, 6.1.0.1, 6.1.0.2, 6.1.0.3, 6.1.0.4, 6.1.1, 6.1.1.1, 6.1.1.2, 6.1.1.3, 6.1.1.4, and 6.1.1.5 on all supported platforms and all currently available versions of Java.
IBM UrbanCode Deploy with Patterns is not affected by this vulnerability.
Remediation/Fixes
For all affected versions of IBM UrbanCode Deploy 6.0.x, upgrade to IBM UrbanCode Deploy 6.0.1.9 or later.
For all affected versions of IBM UrbanCode Deploy 6.1.x, upgrade to IBM UrbanCode Deploy 6.1.1.6 or later.
Workarounds and Mitigations
If Oracle or IBM Java 7 or 8 is used on the server, edit the jdk.tls.disabledAlgorithms property in <Java Home>/lib/security/java.security.
Example:
jdk.tls.disabledAlgorithms=SSLv3, DH, DHE
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References
Change History
* 30 June 2015: Added link to UrbanCode Deploy 6.1.1.6
* 11 June 2015: Original copy published
*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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Document Information
Modified date:
17 June 2018
UID
swg21957979