Security Bulletin: There are multiple vulnerabilities in the Linux Kernel used in IBM Elastic Storage System

Summary

There are security vulnerabilities in versions of Linux Kernel that are shipped with versions of IBM Elastic Storage System. A fix for these vulnerabilities is available.

Vulnerability Details

CVEID:CVE-2020-14385
**DESCRIPTION:**Linux Kernel is vulnerable to a denial of service, caused by a failure of the file system metadata validator in XFS. By sending a specially crafted request, a local attacker could exploit this vulnerability to cause the system to shutdown.
CVSS Base score: 4
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/188394 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID:CVE-2020-26541
**DESCRIPTION:**Linux Kernel could allow a local authenticated attacker to bypass security restrictions, caused by improper enforcing the Secure Boot Forbidden Signature Database (aka dbx) protection mechanism. By sending a specially-crafted request, an attacker could exploit this vulnerability to bypass access restrictions.
CVSS Base score: 7.8
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/189232 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)

CVEID:CVE-2020-10773
**DESCRIPTION:**Linux Kernel could allow a local authenticated attacker to obtain sensitive information, caused by a stack information leak flaw in s390/s390x in the memory manager functionality. An attacker could exploit this vulnerability to obtain kernel data.
CVSS Base score: 4.4
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/185378 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N)

CVEID:CVE-2019-20636
**DESCRIPTION:**Linux Linux could allow a local attacker to execute arbitrary code on the system, caused by an out-of-bounds write flaw in the input_set_keycode function. By using a specially-crafted keycode table, an attacker could exploit this vulnerability to execute arbitrary code or cause a denial of service condition on the system.
CVSS Base score: 8.4
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/181202 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

CVEID:CVE-2020-12826
**DESCRIPTION:**Linux Kernel could allow a local attacker to bypass security restrictions, caused by a signal access-control issue in exec_id in include/linux/sched.h. By sending a specially-crafted request, an attacker could exploit this vulnerability to bypass checks to send any signal to a privileged process.
CVSS Base score: 6.2
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/182113 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)

Affected Products and Versions

Remediation/Fixes

IBM recommends that you fix this vulnerability by upgrading affected versions of IBM Elastic Storage System 3000 and 5000 to the following code levels or higher:

V6.0.1.2 or later.

https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=Software%20defined%20storage&product=ibm/StorageSoftware/IBM+Elastic+Storage+Server+(ESS)&release=6.0.0&platform=All&function=all

Workarounds and Mitigations

None