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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

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:
16 June 2018

UID

swg21972076