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

Security Bulletin

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-2020-16166
DESCRIPTION: Linux Kernel could allow a remote attacker to obtain sensitive information, caused by an error related to drivers/char/random.c and kernel/time/timer.c. An attacker could exploit this vulnerability to obtain sensitive information about the internal state of the network RNG.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/186135 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

CVEID: CVE-2020-25705
DESCRIPTION: Linux Kernel could allow a remote attacker to bypass security restrictions, caused by a flaw in the way reply ICMP packets are limited. By sending a specially-crafted request, an attacker could exploit this vulnerability to bypass source port UDP randomization to scan open UDP ports.
CVSS Base score: 7.4
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/191785 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N)

CVEID: CVE-2020-29661
DESCRIPTION: Linux Kernel could allow a local attacker to execute arbitrary code on the system, caused by a locking inconsistency issue in the tty subsystem in drivers/tty/tty_jobctrl.c. By sending a specially-crafted request, an attacker could exploit this vulnerability to execute arbitrary code or cause a denial of service condition.
CVSS Base score: 8.4
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/192874 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)

Affected Products and Versions

Affected Product(s)	Version(s)
IBM Elastic Storage System	6.0.0 - 6.0.2.0

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:

V6.0.2.1

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

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Change History

21 Apr 2021: Initial Publication

*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.

Document Location

Worldwide

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Tips

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