Security Bulletin
Summary
A Linux Kernel privilege escalation vulnerability affects PowerKVM.
Vulnerability Details
CVEID: CVE-2016-0728
DESCRIPTION: Linux Kernel could allow a local attacker to gain elevated privileges on the system, caused by a use-after-free in the join_session_keyring() function in security/keys/process_keys.c. By overflowing the usage field, an attacker could exploit this vulnerability to execute arbitrary code on the system with kernel-level privileges.
CVSS Base Score: 8.4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/109695 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Affected Products and Versions
PowerKVM 2.1 and PowerKVM 3.1
Remediation/Fixes
Fix is made available via Fix Central (https://ibm.biz/BdEnT8) for v2.1 in 2.1.1 Build 65.5 and all later 2.1.1 SP3 service builds and 2.1.1 fix packs. For version 3.1, see https://ibm.biz/BdHggw for 3.1 service build 2 or later.
For 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 for prerequisite fixes and instructions. Customers can also update from 2.1.1 (GA and later levels) by using "yum update".
Workarounds and Mitigations
None
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References
Change History
20 January 2016 - Initial Version
*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:
17 June 2018
UID
isg3T1023279