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Ubuntu 20.04 LTS: 5001-1 Critical: Linux Kernel OEM DoS Threats

ubuntu
Calendar Grey June 23, 2021
Dist Ubuntu Esm H88
A wide range of vulnerabilities was mitigated in the Linux kernel 5.10 for Ubuntu 20.04 LTS, improving both system consistency and protection.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-oem-5.10: Linux kernel for OEM systems

Details:

Norbert Slusarek discovered a race condition in the CAN BCM networking

protocol of the Linux kernel leading to multiple use-after-free

vulnerabilities. A local attacker could use this issue to execute arbitrary

code. (CVE-2021-3609)

Mathy Vanhoef discovered that the Linux kernel’s WiFi implementation did

not properly clear received fragments from memory in some situations. A

physically proximate attacker could possibly use this issue to inject

packets or expose sensitive information. (CVE-2020-24586)

Mathy Vanhoef discovered that the Linux kernel’s WiFi implementation

incorrectly handled encrypted fragments. A physically proximate attacker

could possibly use this issue to decrypt fragments. (CVE-2020-24587)

Mathy Vanhoef discovered that the Linux kernel’s WiFi implementation

incorrectly handled certain malformed fra...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory critical arbitrary code execution Ubuntu DoS threat Linux kernel OEM systems

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
  linux-image-5.10.0-1033-oem     5.10.0-1033.34
  linux-image-oem-20.04           5.10.0.1033.34
  linux-image-oem-20.04b          5.10.0.1033.34

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

https://ubuntu.com/security/notices/USN-5001-1

CVE-2020-24586, CVE-2020-24587, CVE-2020-24588, CVE-2020-26139,

CVE-2020-26141, CVE-2020-26145, CVE-2020-26147, CVE-2021-23133,

CVE-2021-23134, CVE-2021-31440, CVE-2021-32399, CVE-2021-33034,

CVE-2021-3506, CVE-2021-3543, CVE-2021-3609

Severity
critical
Lowest
Low
Medium
High
Critical

June 23, 2021

Topics%20covered

Topics Covered

security advisory critical arbitrary code execution Ubuntu DoS threat Linux kernel OEM systems

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-5.10/5.10.0-1033.34

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