IBM Support

Security Bulletin: Vulnerabilities in the Linux Kernel affect PowerKVM

Created by Scott Garfinkle on
Published URL:
https://www.ibm.com/support/pages/node/794373
794373

Security Bulletin


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 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 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

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

8 January 2019 - Initial Version

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

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Document Information

Modified date:
04 March 2019

UID

ibm10794373

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