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Security Bulletin: Vulnerabilities in GSKit fixed in IBM Security/Tivoli Directory Server for AIX/VIOS (CVE-2015-0138, CVE-2015-0159)

Security Bulletin


Summary

GSKit is an IBM component that is used by IBM Security/Tivoli Directory Server. The GSKit that is shipped with IBM Security/Tivoli Directory Server contains multiple security vulnerabilities including the “FREAK: Factoring Attack on RSA-EXPORT keys" TLS/SSL client and server vulnerability, IBM Security/Tivoli Directory Server has addressed the applicable CVE.

Vulnerability Details

CVEID: CVE-2015-0138

DESCRIPTION: A vulnerability in various IBM SSL/TLS implementations could allow a remote attacker to downgrade the security of certain SSL/TLS connections. An IBM SSL/TLS client implementation could accept the use of an RSA temporary key in a non-export RSA key exchange ciphersuite. This could allow a remote attacker using man-in-the-middle techniques to facilitate brute-force decryption of TLS/SSL traffic between vulnerable clients and servers.
This vulnerability is also known as the FREAK attack.

CVSS Base Score: 4.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/#/vulnerabilities/100691 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:N/I:P/A:N)



CVEID: CVE-2015-0159

DESCRIPTION: An unspecified error in GSKit usage of OpenSSL crypto function related to the production of incorrect results on some platforms by Bignum squaring (BN_sqr) has an unknown attack vector and impact in some ECC operations.

CVSS Base Score: 2.6
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/#/vulnerabilities/100835 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:H/Au:N/C:N/I:P/A:N)

Affected Products and Versions

5.3, 6.1, 7.1

VIOS 2.2.x

Remediation/Fixes

The GSKit package contains a fix and needs to be installed on AIX/VIOS systems.

The fixes for the GSKit components can be downloaded at the following link:

Vulnerabilities in GSKit fixed in IBM Security/Tivoli Directory Server (CVE-2015-0138, CVE-2015-0159)

Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

References

Off

Change History

Original publication

*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

According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

[{"Product":{"code":"SSKJC8","label":"IBM Enterprise Edition for AIX"},"Business Unit":{"code":"BU009","label":"Systems - Server"},"Component":"--","Platform":[{"code":"PF002","label":"AIX"}],"Version":"5.3;6.1;7.1","Edition":"Enterprise"},{"Product":{"code":"SSMV87","label":"AIX Enterprise Edition"},"Business Unit":{"code":"BU009","label":"Systems - Server"},"Component":" ","Platform":[{"code":"","label":""}],"Version":"","Edition":""}]

Document Information

Modified date:
17 June 2018

UID

isg3T1022075