Security Bulletin: Vulnerabilities in bind affect PowerKVM (CVE-2016-2776, CVE-2016-8864)

Summary

PowerKVM is affected by vulnerabilities in ISC Bind. IBM has now addressed these vulnerabilities.

Vulnerability Details

CVEID: CVE-2016-2776**
DESCRIPTION:** ISC BIND is vulnerable to a denial of service, caused by an assertion failure in buffer.c while a nameserver is building responses to a specifically constructed request. By sending a specially crafted DNS packet, a remote attacker could exploit this vulnerability to make named exit unexpectedly with an assertion failure.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/117246 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:N/A:H)

CVEID: CVE-2016-8864**
DESCRIPTION:** ISC BIND is vulnerable to a denial of service, caused by the improper handling of responses containing a DNAME answer in db.c or resolver.c. By sending a recursive response, a remote attacker could exploit this vulnerability to trigger an assertion failure.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/118526 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: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. This issue is addressed as of 3.1.0.2 update 3 or later.

For version 2.1, see https://ibm.biz/BdEnT8. This issue is addressed as of PowerKVM 2.1.1.3-65 update 13 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&gt; for prerequisite fixes and instructions.