Security Bulletin: Vulnerabilities in DHCP affect PowerKVM

Summary

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

Vulnerability Details

CVEID: CVE-2018-5733**
DESCRIPTION:** ISC DHCP is vulnerable to a denial of service. By sending an overly large amount of packets, a remote attacker could overflow a reference counter and cause dhcpd to crash.
CVSS Base Score: 5.9
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/139614 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2018-5732**
DESCRIPTION:** ISC DHCP is vulnerable to a denial of service, caused by a buffer overflow in dhclient. By sending a specially crafted response, a remote attacker could overflow a buffer and possibly execute arbitrary code on the system or cause the server to crash.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/139613 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 v3.1

Remediation/Fixes

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

Fix images are made available via Fix Central. See https://ibm.biz/BdHggw. This issue is addressed starting with v3.1.0.2 update 13.

Workarounds and Mitigations

none