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-2020-35508
DESCRIPTION: Linux Kernel could allow a local attacker to bypass security restrictions, caused by a race condition and incorrect initialization in the handling of child/parent process identification. 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/198870 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)

CVEID: CVE-2021-33909
DESCRIPTION: Linux Kernel could allow a local attacker to gain elevated privileges on the system, caused by an out-of-bounds write in fs/seq_file.c. By sending a specially-crafted request, an attacker could exploit this vulnerability to escalate privileges to root.
CVSS Base score: 8.4
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/205906 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-2020-25704
DESCRIPTION: Linux Kernel is vulnerable to a denial of service, caused by a memory leak in the perf_event_parse_addr_filter function. By executing a specially-crafted program, a local attacker could exploit this vulnerability to exhaust available memory on the system.
CVSS Base score: 6.2
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/191348 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

Affected Product(s)	Version(s)
IBM Elastic Storage System	6.1.0 - 6.1.1.2
IBM Elastic Storage System	6.0.0 - 6.0.2.2

Remediation/Fixes

IBM recommends that you fix this vulnerability by upgrading affected versions of IBM Elastic Storage System 3000, 3200 and 5000 to the following code levels or higher:

V6.0.2.3 or V6.1.2

https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=Software%20defined%20storage&product=ibm/StorageSoftware/IBM+Elastic+Storage+Server+(ESS)&release=6.1.0&platform=All&function=all

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=Linux+PPC64LE&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

01 Dec 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