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

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&gt; 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&gt; 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

| GSKit|Fix
—|—|—
Tivoli Directory Server 6.3| 8.0.50.55| 6.3.0.40-ISS-ITDS-IF0040
IBM Security Directory Server 6.3.1| 8.0.50.55| 6.3.1.14-ISS-ISDS-IF0014
IBM Security Directory Server 6.4| 8.0.50.55| 6.4.0.5-ISS-ISDS-IF0005

Workarounds and Mitigations

None