Security Bulletin
Summary
PowerKVM is affected by two vulnerabilities in libvirt. These vulnerabilities are now fixed.
Vulnerability Details
CVEID: CVE-2015-5313
DESCRIPTION: libvirt could allow a local attacker to traverse directories on the system, caused by an error in the virStorageBackendFileSystemVolCreate function within storage/storage_backend_fs.c when fine-grained Access Control Lists (ACL) are enabled. An attacker could use "virsh vol-create-as" command with "dot dot" sequences (/../) in the volume name to create arbitrary files on the system.
CVSS Base Score: 4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/112670 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:L/A:N)
CVEID: CVE-2016-5008
DESCRIPTION: Libvirt could allow a remote attacker to bypass security restrictions, caused by the failure to properly disable password checking when the password on a VNC server is set to an empty string. By connecting to the server, an attacker could exploit this vulnerability to bypass authentication and establish a VNC session.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/115127 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
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 3.1.0.2 update 1 or later.
For version 2.1, see PowerKVM 2.1.1.3-65. Update 11 at https://ibm.biz/BdEnT8 or later. 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 for prerequisite fixes and instructions.
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References
Change History
22 August 2016 - Initial Version
25 August 2016 - Added info on CVE-2016-5008
*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
isg3T1024185