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Alerts This Week
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Ubuntu 18.04 LTS: USN-5002-1 Critical Race Condition in Kernel

ubuntu
Calendar Grey June 23, 2021
Dist Ubuntu Esm H88
Mandriva Security Alert MSA-2023-8 highlights a critical kernel vulnerability that permits unauthorized root access. Immediate action is advised to safeguard systems.
The system could be made to run programs as an administrator.

Summary

The system could be made to run programs as an administrator.

Software Description:

- linux-gke-5.3: Linux kernel for Google Container Engine (GKE) systems

- linux-hwe: Linux hardware enablement (HWE) kernel

- linux-raspi2-5.3: Linux kernel for Raspberry Pi (V8) 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.

Topics%20covered

Topics Covered

security advisory update critical Ubuntu race condition kernel program execution

Update Instructions

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

Ubuntu 18.04 LTS:
  linux-image-5.3.0-1041-raspi2   5.3.0-1041.43
  linux-image-5.3.0-1044-gke      5.3.0-1044.47
  linux-image-5.3.0-75-generic    5.3.0-75.71
  linux-image-5.3.0-75-lowlatency  5.3.0-75.71
  linux-image-gke-5.3             5.3.0.1044.27
  linux-image-gkeop-5.3           5.3.0.75.132
  linux-image-raspi2-hwe-18.04    5.3.0.1041.30

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-5002-1

CVE-2021-3609

Severity
critical
Lowest
Low
Medium
High
Critical

June 23, 2021

Topics%20covered

Topics Covered

security advisory update critical Ubuntu race condition kernel program execution

Package Information

https://launchpad.net/ubuntu/+source/linux-gke-5.3/5.3.0-1044.47
https://launchpad.net/ubuntu/+source/linux-hwe/5.3.0-75.71
https://launchpad.net/ubuntu/+source/linux-raspi2-5.3/5.3.0-1041.43

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