Explore top 10 tips to secure your open-source projects now. Read More

×
Alerts This Week
Warning Icon 1 496
Alerts This Week
Warning Icon 1 496

Ubuntu 20.04 LTS USN-5115-1 Critical: Linux Kernel OEM Issues

ubuntu
Calendar Grey October 20, 2021
Dist Ubuntu Esm H88
Urgent Ubuntu Security Update addressing the fix for various kernel vulnerabilities that impact data security and system reliability.
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:

It was discovered that a race condition existed in the Atheros Ath9k WiFi

driver in the Linux kernel. An attacker could possibly use this to expose

sensitive information (WiFi network traffic). (CVE-2020-3702)

Ofek Kirzner, Adam Morrison, Benedict Schlueter, and Piotr Krysiuk

discovered that the BPF verifier in the Linux kernel missed possible

mispredicted branches due to type confusion, allowing a side-channel

attack. An attacker could use this to expose sensitive information.

(CVE-2021-33624)

Benedict Schlueter discovered that the BPF subsystem in the Linux kernel

did not properly protect against Speculative Store Bypass (SSB) side-

channel attacks in some situations. A local attacker could possibly use

this to expose sensitive information. (CVE-2021-34556)

Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not

properly p...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical information disclosure ubuntu linux kernel oem

Update Instructions

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

Ubuntu 20.04 LTS:
  linux-image-5.10.0-1050-oem     5.10.0-1050.52
  linux-image-oem-20.04           5.10.0.1050.52
  linux-image-oem-20.04b          5.10.0.1050.52

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-5115-1

CVE-2020-3702, CVE-2021-33624, CVE-2021-34556, CVE-2021-35477,

CVE-2021-3679, CVE-2021-37159, CVE-2021-3732, CVE-2021-3739,

CVE-2021-3743, CVE-2021-3753, CVE-2021-3759, CVE-2021-38166,

CVE-2021-38204, CVE-2021-38205, CVE-2021-40490, CVE-2021-42008

Severity
critical
Lowest
Low
Medium
High
Critical

October 20, 2021

Topics%20covered

Topics Covered

security advisory denial of service critical information disclosure ubuntu linux kernel oem

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-5.10/5.10.0-1050.52

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.