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Security Bulletin: Vulnerabilities in GSKit affect Rational Developer for System z (CVE-2015-7421, CVE-2015-7420)

Created by Gina Long on
Published URL:
https://www.ibm.com/support/pages/node/539505
539505

Security Bulletin


Summary

Vulnerabilities were discovered in GSKit. Rational Developer for System z uses GSKit and addressed the applicable CVE.

Vulnerability Details

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    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

Principal Product and Version(s)

  • Rational Developer for System z, versions 9.0.1.4 and earlier
  • Rational Developer for System z, versions 9.1.1.2 and earlier
  • Rational Developer for z Systems, versions 9.5.1 and earlier

Remediation/Fixes

IBM has provided patches for all affected versions.

Follow the installation instructions in the README files included with the patch.

The fix can be obtained at the following locations:

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Important Note

IBM strongly suggests that all System z customers be subscribed to the System z Security Portal to receive the latest critical System z security and integrity service. If you are not subscribed, see the instructions on the System z Security web site. Security and integrity APARs and associated fixes will be posted to this portal. IBM suggests reviewing the CVSS scores and applying all security or integrity fixes as soon as possible to minimize any potential risk.

References

Complete CVSS v2 Guide
On-line Calculator v2

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Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

* 26 January 2016: Original copy 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.

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Document Information

Modified date:
27 October 2020

UID

swg21975050

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