Security Bulletin: Vulnerability in Network Time Protocol (NTP) affects IBM Virtualization Engine TS7700 (CVE-2020-11868)

Summary

There is a vulnerability in the Network Time Protocol (NTP) implementation embedded within the IBM Virtualization Engine TS7700.

Vulnerability Details

CVEID:CVE-2020-11868
**DESCRIPTION:**NTP is vulnerable to a denial of service, caused by a flaw in ntpd. By sending a server mode packet with a spoofed source IP address, a remote attacker could exploit this vulnerability to block unauthenticated synchronization resulting in a denial of service condition.
CVSS Base score: 5.9
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/180011 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

All versions of microcode for the IBM Virtualization Engine TS7700 (3957-VEC and 3957-VED) prior to and including the following are affected:

Remediation/Fixes

Contact IBM Service at 1-800-IBM-SERV to arrange an upgrade to the latest microcode version followed by the installation of VTD_EXEC.279 as needed. Minimum microcode versions are shown below:

Upgrade to 8.42.2.12 + VTD_EXEC.279

- OR -

Upgrade to 8.50.0.134 + VTD_EXEC.279

- OR -

Upgrade to 8.50.0.140 + VTD_EXEC.279

- OR -

Upgrade to 8.50.1.25 + VTD_EXEC.279

- OR -

Upgrade to 8.50.2.6 + VTD_EXEC.279

- OR -

Upgrade to 8.51.0.63 + VTD_EXEC.279

3957| VED|

Upgrade to 8.50.0.134 + VTD_EXEC.279

- OR -

Upgrade to 8.50.0.140 + VTD_EXEC.279

- OR -

Upgrade to 8.50.1.25 + VTD_EXEC.279

- OR -

Upgrade to 8.50.2.6 + VTD_EXEC.279

- OR -

Upgrade to 8.51.0.63 + VTD_EXEC.279

The minimum VTD_EXEC version is shown below:

Workarounds and Mitigations

Although IBM recommends that you upgrade to the fixes identified above, you can mitigate, but not eliminate the risk of these vulnerabilities by restricting physical and network access to the TS7700 to authorized users and IBM Service Personnel only.