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Security Bulletin: Vulnerabilities in GSKit 8 affect Tivoli Directory Server and IBM Security Directory Server (CVE-2015-7421, CVE-2015-7420)

Security Bulletin


Summary

Vulnerabilities were discovered in GSKit 8. Tivoli Directory Server and IBM Security Directory Server use GSKit 8 and have addressed the applicable CVE's. GSKit 7 is not affected.

Vulnerability Details

CVEID: CVE-2015-7421
DESCRIPTION: A vulnerability in GSKit could allow a remote attacker to obtain sensitive information. The internal ICC PRNG pool state is duplicated during a fork() system call operation which results in a period of time where child processes may generate identical PRNG output to the parent. This may allow possible attacks related to predicable state which an attacker could exploit.
CVSS Base Score: 3.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/107695 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)

CVEID: CVE-2015-7420
DESCRIPTION: A vulnerability in GSKit could allow a remote attacker to obtain sensitive information. The GSKit PRNG state is duplicated during a fork() system call operation which results in a period of time where child processes may generate identical PRNG output to the parent.
CVSS Base Score: 3.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/107694 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)

Affected Products and Versions

Tivoli Directory Server 6.3 using GSKit 8.0.50.53 or earlier.
IBM Security Directory Server 6.3.1 using GSKit 8.0.50.53 or earlier.
IBM Security Directory Server 6.4 using GSKit 8.0.50.53 or earlier.
(GSKit 7 is not affected.)

Remediation/Fixes

Product

GSKitFix
Tivoli Directory Server 6.38.0.50.556.3.0.40-ISS-ITDS-IF0040
IBM Security Directory Server 6.3.18.0.50.556.3.1.14-ISS-ISDS-IF0014
IBM Security Directory Server 6.48.0.50.556.4.0.5-ISS-ISDS-IF0005

Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

References

Off

Acknowledgement

None

Change History

28 Nov 2015: Original draft
7 Dec 2015: Clarify that GSKit 7 is not affected

*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. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.

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Document Information

Modified date:
16 June 2018

UID

swg21972076