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Ubuntu 14.04 ESM: USN-4392-1 Critical: Kernel Buffer Overflow

ubuntu
Calendar Grey June 9, 2020
Dist Ubuntu Esm H88
The Ubuntu Security Announcement USN-4392-1 outlines concerns related to kernel vulnerabilities and the measures taken to rectify security flaws in the Linux operating system.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

- linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise ESM

Details:

It was discovered that the Marvell WiFi-Ex Driver in the Linux kernel did

not properly validate status lengths in messages received from an access

point, leading to a buffer overflow. A physically proximate attacker

controlling an access point could use this to construct messages that could

possibly result in arbitrary code execution. (CVE-2020-12654)

It was discovered that memory contents previously stored in

microarchitectural special registers after RDRAND, RDSEED, and SGX EGETKEY

read operations on Intel client and Xeon E3 processors may be briefly

exposed to processes on the same or different processor cores. A local

attacker could use this to expose sensitive information. (CVE-2020-0543)

Piotr Krysiuk discovered that race conditions existed in the file system

implementation in the Lin...

Read the Full Advisory

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Topics Covered

security advisory denial of service buffer overflow kernel information exposure ubuntu

Update Instructions

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

Ubuntu 14.04 ESM:
  linux-image-3.13.0-180-generic  3.13.0-180.231
  linux-image-3.13.0-180-generic-lpae  3.13.0-180.231
  linux-image-3.13.0-180-lowlatency  3.13.0-180.231
  linux-image-3.13.0-180-powerpc-e500  3.13.0-180.231
  linux-image-3.13.0-180-powerpc-e500mc  3.13.0-180.231
  linux-image-3.13.0-180-powerpc-smp  3.13.0-180.231
  linux-image-3.13.0-180-powerpc64-emb  3.13.0-180.231
  linux-image-3.13.0-180-powerpc64-smp  3.13.0-180.231
  linux-image-generic             3.13.0.180.189
  linux-image-generic-lpae        3.13.0.180.189
  linux-image-highbank            3.13.0.180.189
  linux-image-lowlatency          3.13.0.180.189
  linux-image-omap                3.13.0.180.189
  linux-image-powerpc-e500        3.13.0.180.189
  linux-image-powerpc-e500mc      3.13.0.180.189
  linux-image-powerpc-smp         3.13.0.180.189
  linux-image-powerpc64-emb       3.13.0.180.189
  linux-image-powerpc64-smp       3.13.0.180.189
  linux-image-server              3.13.0.180.189
  linux-image-virtual             3.13.0.180.189

Ubuntu 12.04 ESM:
  linux-image-3.13.0-180-generic  3.13.0-180.231~12.04.1
  linux-image-3.13.0-180-generic-lpae  3.13.0-180.231~12.04.1
  linux-image-3.13.0-180-lowlatency  3.13.0-180.231~12.04.1
  linux-image-generic-lpae-lts-trusty  3.13.0.180.166
  linux-image-generic-lts-trusty  3.13.0.180.166

Please note that the mitigation for CVE-2020-0543 requires a processor
microcode update to be applied, either from your system manufacturer
or via the intel-microcode package. The kernel update for this issue
provides the ability to disable the mitigation and to report
vulnerability status.

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-4392-1

CVE-2020-0543, CVE-2020-12114, CVE-2020-12654,

https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SRBDS

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June 10, 2020

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow kernel information exposure ubuntu

Package Information

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