Security Bulletin
Summary
OpenSSL vulnerabilities were disclosed by the OpenSSL Project and affect Rational Tau. This includes the alternate chains certificate forgery vulnerability (CVE-2015-1793). Rational Tau has addressed the applicable CVEs.
Vulnerability Details
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
4.3, 4.3.0.1, 4.3.0.2, 4.3.0.3, 4.3.0.4, 4.3.0.5, 4.3.0.6, 4.3.0.6 Interim Fix 1, 4.3.0.6 Interim Fix 2, 4.3.0.6 Interim Fix 3, 4.3.0.6 Interim Fix 4
Remediation/Fixes
Upgrade to Rational Tau Interim Fix 5 for 4.3.0.6
Workarounds and Mitigations
No workarounds
Get Notified about Future Security Bulletins
References
Acknowledgement
None
Change History
30.07.2015: Original version 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.
Was this topic helpful?
Document Information
Modified date:
17 June 2018
UID
swg21963448