Security Bulletin: A vulnerability in DHCP affects PowerKVM (CVE-2016-5410)

Security Bulletin

Summary

PowerKVM is affected by a vulnerability in the ISC DHCP Daemon. IBM has now addressed this vulnerability.

Vulnerability Details

CVEID: CVE-2016-2774
DESCRIPTION: ISC DHCP is vulnerable to a denial of service, caused by the failure to limit the number of open TCP connections to the ports for inter-process communications and control. By opening a large number of TCP connections, a remote attacker from within the local network could exploit this vulnerability to become unresponsive or consume all available sockets.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/111319 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:A/AC:H/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 for prerequisite fixes and instructions.

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References

Complete CVSS v2 Guide
On-line Calculator v2

Complete CVSS v3 Guide
On-line Calculator v3

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Change History

14 November 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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Tips

Security Bulletin: A vulnerability in DHCP affects PowerKVM (CVE-2016-5410)