Security Bulletin: Vulnerabilities in the Linux Kernel affect PowerKVM

Summary

PowerKVM is affected by vulnerabilities in the Linux Kernel. IBM has now addressed these vulnerabilities.

Vulnerability Details

CVEID: CVE-2018-18710 DESCRIPTION: Linux Kernel could allow a local attacker to obtain sensitive information, caused by improper bounds checking in cdrom_ioctl_select_disc in drivers/cdrom/cdrom.c. An attacker could exploit this vulnerability to obtain sensitive information.
CVSS Base Score: 4
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/152126&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

CVEID: CVE-2017-17807 DESCRIPTION: Linux Kernel could allow a local authenticated attacker to bypass security restrictions, caused by omitting an access-control check when adding a key to the current task’'s default request-key keyring in the KEYS subsystem. By using a sequence of specially-crafted system calls, an attacker could exploit this vulnerability to add keys to a keyring with only Search permission.
CVSS Base Score: 5.5
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/136628&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/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. For version 3.1, see https://ibm.biz/BdHggw. This issue is addressed starting with v3.1.0.2 update 17.

Workarounds and Mitigations

none