Security Bulletin: GNU C library (glibc) vulnerability affects IBM PureApplication System (CVE-2015-0235)

Security Bulletin

Summary

GNU C library (glibc) vulnerability that has been referred to as GHOST affects IBM PureApplication System.

Vulnerability Details

CVEID: CVE-2015-0235

DESCRIPTION:

The gethostbyname functions of the GNU C Library (glibc) are vulnerable to a buffer overflow. By sending a specially crafted, but valid hostname argument, a remote attacker could overflow a buffer and execute arbitrary code on the system with the privileges of the targeted process or cause the process to crash. The impact of an attack depends on the implementation details of the targeted application or operating system. This issue is being referred to as the "Ghost" vulnerability.

CVSS Base Score: 7.6
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/100386 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:H/Au:N/C:C/I:C/A:C)

Affected Products and Versions

· IBM PureApplication System V1.0
· IBM PureApplication System V1.1
· IBM PureApplication System V2.0

Remediation/Fixes

The deployed Red Hat Linux-based virtual machines on all IBM PureApplication Systems types are affected. The solution is to apply the following IBM PureApplication System emergency fix to the deployed virtual machines.
http://www-933.ibm.com/support/fixcentral/swg/selectFixes?parent=PureSystems&product=ibm/WebSphere/PureApplication+System&release=All&platform=All&function=fixId&fixids=HV_RHEL6_X64_GLIBC_PA_EFIX&includeSupersedes=0

1. Import the fix into the Emergency Fix catalogue.
2. For deployed instances, apply this emergency fix on the VM. The glibc will be upgraded to 2.12-1.149.el6_6.5.

This emergency fix can be applied to:

IBM OS Image for Red Hat Linux System 2.0
IBM OS Image for Red Hat Linux Systems 2.0.0.1
IBM OS Image for Red Hat Linux Systems 2.0.0.2
IBM OS Image for Red Hat Linux Systems 2.0.0.3
IBM OS Image for Red Hat Linux Systems 2.0.0.4
IBM OS Image for Red Hat Linux Systems 2.1.0.0
IBM OS Image for Red Hat Linux Systems 2.1.0.1

After updates have been applied, you must restart any process using glibc. Given that nearly all system processes use glibc, rebooting after upgrading is suggested.

IBM recommends that you review your entire environment to identify vulnerable releases of glibc including your Operating Systems and take appropriate mitigation and remediation actions. Please contact your Operating System provider for more information.

Workarounds and Mitigations

None

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References

Complete CVSS v2 Guide
On-line Calculator v2

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Change History

11 February 2015: Original version 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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Tips

Security Bulletin: GNU C library (glibc) vulnerability affects IBM PureApplication System (CVE-2015-0235)