Security Bulletin: Vulnerabilities in GnuTLS affect PowerKVM

Summary

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

Vulnerability Details

CVEID: CVE-2018-10846 DESCRIPTION: GnuTLS could allow a local authenticated attacker to obtain sensitive information, caused by a cache-based side channel issue. By using a combination of Just in Time Prime+probe attack in combination with Lucky-13 attack, a remote attacker could exploit this vulnerability to recover plain text and obtain information.
CVSS Base Score: 5.3
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/148725&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:N/A:N)

CVEID: CVE-2018-10845 DESCRIPTION: GnuTLS could allow a remote attacker to obtain sensitive information, caused by a flaw in the implementation of HMAC-SHA-384. By sending a specially-crafted packet, a remote attacker could exploit this vulnerability to obtain information.
CVSS Base Score: 5.9
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/148730&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)

CVEID: CVE-2018-10844 DESCRIPTION: GnuTLS could allow a remote attacker to obtain sensitive information, caused by a flaw in the implementation of HMAC-SHA-256. By sending a specially-crafted packet, a remote attacker could exploit this vulnerability to obtain information.
CVSS Base Score: 5.9
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/148731&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/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. For version 3.1, see https://ibm.biz/BdHggw. This issue is addressed starting with v3.1.0.2 update 16.

Workarounds and Mitigations

none