Security Bulletin: Vulnerabilities in krb5 affect PowerKVM

Summary

PowerKVM is affected by vulnerabilities in MIT Kerberos 5 (krb5). IBM has now addressed these vulnerabilities.

Vulnerability Details

CVEID: CVE-2017-11368 DESCRIPTION: MIT Kerberos 5 is vulnerable to a denial of service, caused by a KDC assertion failure. By sending a specially-crafted request, a remote authenticated attacker could exploit this vulnerability to cause memory allocation failure.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/130207 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-2017-7562 DESCRIPTION: MIT krb5 could allow a remote authenticated attacker to bypass security restrictions, caused by the improper validation of a forged certificate EKU and SAN. An attacker could exploit vulnerability to gain unauthorized access to the system to impersonate arbitrary principals under rare and erroneous circumstances.
CVSS Base Score: 6.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/143332 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N)

Affected Products and Versions

PowerKVM 3.1

Remediation/Fixes

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

Fix images are made available via Fix Central. See <https://ibm.biz/BdHggw&gt;. This issue is addressed starting with v3.1.0.2 update 14.

Workarounds and Mitigations

none