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Alerts This Week
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Ubuntu 12.04 ESM: USN-4188-1 Critical: Linux Kernel Information Exposure

ubuntu
Calendar Grey November 12, 2019
Dist Ubuntu Esm H88
Crucial Ubuntu Linux kernel alert highlights potential vulnerabilities leading to private data leaks. Act swiftly to secure your device.
The system could be made to expose sensitive information.

Summary

The system could be made to expose sensitive information.

Software Description:

- linux: Linux kernel

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

Details:

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

Kaveh Razavi, Herbert Bos, Cristiano Giuffrida, Giorgi Maisuradze, Moritz

Lipp, Michael Schwarz, Daniel Gruss, and Jo Van Bulck discovered that Intel

processors using Transactional Synchronization Extensions (TSX) could

expose memory contents previously stored in microarchitectural buffers to a

malicious process that is executing on the same CPU core. A local attacker

could use this to expose sensitive information.

Topics%20covered

Topics Covered

security advisory system update ubuntu sensitive information linux kernel intel processor CVE-2019-11135

Update Instructions

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

Ubuntu 12.04 ESM:
  linux-image-3.13.0-175-generic  3.13.0-175.226~12.04.1
  linux-image-3.13.0-175-generic-lpae  3.13.0-175.226~12.04.1
  linux-image-3.13.0-175-lowlatency  3.13.0-175.226~12.04.1
  linux-image-3.2.0-144-generic   3.2.0-144.191
  linux-image-3.2.0-144-generic-pae  3.2.0-144.191
  linux-image-3.2.0-144-virtual   3.2.0-144.191
  linux-image-generic             3.2.0.144.159
  linux-image-generic-lpae-lts-trusty  3.13.0.175.163
  linux-image-generic-lts-trusty  3.13.0.175.163
  linux-image-generic-pae         3.2.0.144.159
  linux-image-server              3.2.0.144.159
  linux-image-virtual             3.2.0.144.159

Please note that mitigating the TSX (CVE-2019-11135) issue requires
a corresponding Intel processor microcode update.

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-4188-1

CVE-2019-11135,

https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/TAA_MCEPSC_i915

Severity
critical
Lowest
Low
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Critical

November 13, 2019

Topics%20covered

Topics Covered

security advisory system update ubuntu sensitive information linux kernel intel processor CVE-2019-11135

Package Information

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