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Ubuntu 12.04 ESM USN-3742-3 Critical Trusty HWE Kernel Update

ubuntu
Calendar Grey August 21, 2018
Dist Ubuntu Esm H88
Ubuntu Security Notice USN-3742-3 addresses recent kernel update challenges in Trusty HWE, detailing user issues and swift resolution measures taken.
USN-3742-2 introduced regressions in the Linux Hardware Enablement(HWE) kernel for Ubuntu 12.04 ESM.

Summary

USN-3742-2 introduced regressions in the Linux Hardware Enablement

(HWE) kernel for Ubuntu 12.04 ESM.

Software Description:

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

Details:

USN-3742-2 introduced mitigations in the Linux Hardware Enablement

(HWE) kernel for Ubuntu 12.04 ESM to address L1 Terminal Fault (L1TF)

vulnerabilities (CVE-2018-3620, CVE-2018-3646). Unfortunately, the

update introduced regressions that caused kernel panics when booting

in some environments as well as preventing Java applications from

starting. This update fixes the problems.

We apologize for the inconvenience.

Original advisory details:

It was discovered that memory present in the L1 data cache of an Intel CPU

core may be exposed to a malicious process that is executing on the CPU

core. This vulnerability is also known as L1 Terminal Fault (L1TF). A local

attacker in a guest virtual machine could use this to expose sensitive

information (memory from other gu...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory DoS kernel system crash regression trusty L1TF

Update Instructions

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

Ubuntu 12.04 ESM:
  linux-image-3.13.0-156-generic  3.13.0-156.206~precise1
  linux-image-3.13.0-156-generic-lpae  3.13.0-156.206~precise1
  linux-image-generic-lpae-lts-trusty  3.13.0.156.146
  linux-image-generic-lts-trusty  3.13.0.156.146

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-3742-3

https://ubuntu.com/security/notices/USN-3742-2

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1787127

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1787258

https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/L1TF

Severity
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August 21, 2018

Topics%20covered

Topics Covered

security advisory DoS kernel system crash regression trusty L1TF

Package Information

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