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Ubuntu 12.04 LTS USN-1704-2 Critical: Kernel Regression Issues Fix

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Calendar Grey February 1, 2013
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Ubuntu 20.04 LTS patch addresses critical vulnerabilities identified in USN-4201-1. Implement this update to maintain system integrity.
USN-1704-1 introduced a regression in the Linux kernel.

Summary

USN-1704-1 introduced a regression in the Linux kernel.

Software Description:

- linux-lts-quantal: Linux hardware enablement kernel from Quantal

Details:

USN-1704-1 fixed vulnerabilities in the Linux kernel. Due to an unrelated

regression inotify/fanotify stopped working after upgrading. This update

fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Brad Spengler discovered a flaw in the Linux kernel's uname system call. An

unprivileged user could exploit this flaw to read kernel stack memory.

(CVE-2012-0957)

Jon Howell reported a flaw in the Linux kernel's KVM (Kernel-based virtual

machine) subsystem's handling of the XSAVE feature. On hosts, using qemu

userspace, without the XSAVE feature an unprivileged local attacker could

exploit this flaw to crash the system. (CVE-2012-4461)

Dmitry Monakhov reported a race condition flaw the Linux ext4 filesystem

that can expose stale data. An unprivileged user could ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory critical Ubuntu system update kernel regression

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.5.0-23-generic    3.5.0-23.35~precise1

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. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

References

https://ubuntu.com/security/notices/USN-1704-2

https://ubuntu.com/security/notices/USN-1704-1

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1101666

Severity
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February 01, 2013

Topics%20covered

Topics Covered

security advisory critical Ubuntu system update kernel regression

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-quantal/3.5.0-23.35~precise1

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