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Ubuntu 12.04 ESM: USN-3984-1 Critical: Kernel Memory Exposure

ubuntu
Calendar Grey May 15, 2019
Dist Ubuntu Esm H88
=========================================================================Ubuntu Security Notice USN-
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

Details:

Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Giorgi Maisuradze, Dan

Horea Lutas, Andrei Lutas, Volodymyr Pikhur, Stephan van Schaik, Alyssa

Milburn, Sebastian Österlund, Pietro Frigo, Kaveh Razavi, Herbert Bos,

Cristiano Giuffrida, Moritz Lipp, Michael Schwarz, and Daniel Gruss

discovered that memory previously stored in microarchitectural fill buffers

of an Intel CPU core may be exposed to a malicious process that is

executing on the same CPU core. A local attacker could use this to expose

sensitive information. (CVE-2018-12130)

Brandon Falk, Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Stephan

van Schaik, Alyssa Milburn, Sebastian Österlund, Pietro Frigo, Kaveh

Razavi, Herbert Bos, and Cristiano Giuffrida discovered that memory

previously stored in microarchitectural load ports of an Intel CPU core may

be exposed to a malicious pr...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory security update kernel ubuntu sensitive data memory exposure microarchitectural issue

Update Instructions

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

Ubuntu 12.04 ESM:
  linux-image-3.2.0-140-generic   3.2.0-140.186
  linux-image-3.2.0-140-generic-pae  3.2.0-140.186
  linux-image-3.2.0-140-highbank  3.2.0-140.186
  linux-image-3.2.0-140-omap      3.2.0-140.186
  linux-image-3.2.0-140-powerpc-smp  3.2.0-140.186
  linux-image-3.2.0-140-powerpc64-smp  3.2.0-140.186
  linux-image-3.2.0-140-virtual   3.2.0-140.186
  linux-image-generic             3.2.0.140.155
  linux-image-generic-pae         3.2.0.140.155
  linux-image-highbank            3.2.0.140.155
  linux-image-omap                3.2.0.140.155
  linux-image-powerpc             3.2.0.140.155
  linux-image-powerpc-smp         3.2.0.140.155
  linux-image-powerpc64-smp       3.2.0.140.155
  linux-image-virtual             3.2.0.140.155

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

Please note that fully mitigating the Microarchitectural Data Sampling
(MDS) issues (CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, and
CVE-2019-11091) requires corresponding processor microcode/firmware
updates or, in virtual environments, hypervisor updates.

References

https://ubuntu.com/security/notices/USN-3984-1

CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2019-11091,

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

Severity
critical
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Critical

May 15, 2019

Topics%20covered

Topics Covered

security advisory security update kernel ubuntu sensitive data memory exposure microarchitectural issue

Package Information

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