Security Bulletin: A vulnerability in PolicyKit (polkit) affects PowerKVM (CVE-2015-3256)

Summary

PowerKVM is affected by a vulnerability in PolicyKit (polkit). This vulnerability is now fixed.

Vulnerability Details

CVEID: CVE-2015-3256**
DESCRIPTION:** PolicyKit (polkit) is vulnerable to a denial of service, caused by an error related to javascript rule evaluation. A local attacker could exploit this vulnerability using unknown attack vectors to cause a denial of service.
CVSS Base Score: 6.2
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/108965 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

PowerKVM 2.1 and PowerKVM 3.1

Remediation/Fixes

Customers can update PowerKVM systems by using “yum update”.

Fix images are made available via Fix Central. For version 3.1, see https://ibm.biz/BdHggw for 3.1.0 service pack 1 (SP1) or later.

For version 2.1, the fix is made available via Fix Central (https://ibm.biz/BdEnT8) in 2.1.1 Build 65.7 and all later 2.1.1 SP3 service builds and 2.1.1 service packs. Customers running v2.1 are, in any case, encouraged to upgrade to v3.1.

For v2.1 systems currently running fix levels of PowerKVM prior to 2.1.1, please see <http://download4.boulder.ibm.com/sar/CMA/OSA/05e4c/0/README&gt; for prerequisite fixes and instructions.

Workarounds and Mitigations

v2.1 customers can work around the problem by upgrading to the fixed release of v3.1