Security Bulletin: Vulnerabilities in OpenSSL including Logjam affect the Cordova platform packaged with Rational Application Developer affecting Rational Developer for i and Rational Developer for AIX and Linux

Summary

Portions of IBM Rational Application Developer for WebSphere Software are shipped as a component of Rational Developer for i (RPG and COBOL + Modernization Tools, Java and EGL editions), and Rational Developer for AIX and Linux.
OpenSSL vulnerabilities were disclosed by the OpenSSL Project and affect Rational Application Developer for WebSphere Software. This includes the Logjam Attack on TLS connections using the Diffie-Hellman (DH) key exchange protocol (CVE-2015-4000). This also includes the alternate chains certificate forgery vulnerability (CVE-2015-1793). Rational Application Developer for WebSphere Software has addressed the applicable CVEs

Vulnerability Details

CVEID: 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 ciphersuite 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)

CVEID: CVE-2015-1793** **
DESCRIPTION: OpenSSL could allow a remote attacker to bypass security restrictions, caused by an implementation error of the alternative certificate chain logic. An attacker could exploit this vulnerability to bypass the CA flag and other specific checks on untrusted certificates and issue an invalid certificate.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/104500 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)

Affected Products and Versions

Affected Product and Version(s)

| Product and Version shipped as a component
—|—
IBM Rational Developer for i v9.1, v9.1.1 and v9.1.1.1 RPG and COBOL + Modernization Tools, Java Edition| Rational Application Developer 9.1, 9.1.1
IBM Rational Developer for i v9.1, v9.1.1 and v9.1.1.1, RPG and COBOL + Modernization Tools, EGL Edition| Rational Application Developer 9.1, 9.1.1
IBM Rational Developer for AIX and Linux v9.1 and v9.1.1, AIX COBOL Edition| Rational Application Developer 9.1, 9.1.1
IBM Rational Developer for AIX and Linux v9.1 and v9.1.1, C/C++ Edition| Rational Application Developer 9.1, 9.1.1

Remediation/Fixes

Review the Remediation/Fixes section of Security Bulletin: Vulnerabilities in OpenSSL including Logjam affect Rational Application Developer for WebSphere Software (CVE-2015-4000, CVE-2015-1793) for instructions on obtaining the fix for this issue.

Workarounds and Mitigations

None