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Ubuntu 15.04 USN-2799-1 Critical: Linux Kernel Security Issues

ubuntu
Calendar Grey November 5, 2015
Scroller Ubuntu
Multiple defects were resolved in the kernel, addressing potential service interruptions and data leakage vulnerabilities within Ubuntu.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

It was discovered that in certain situations, a directory could be renamed

outside of a bind mounted location. An attacker could use this to escape

bind mount containment and gain access to sensitive information.

(CVE-2015-2925)

Moein Ghasemzadeh discovered that the USB WhiteHEAT serial driver contained

hardcoded attributes about the USB devices. An attacker could construct a

fake WhiteHEAT USB device that, when inserted, causes a denial of service

(system crash). (CVE-2015-5257)

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu kernel update instructions information disclosure security issues

Update Instructions

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

Ubuntu 15.04:
  linux-image-3.19.0-32-generic   3.19.0-32.37
  linux-image-3.19.0-32-generic-lpae  3.19.0-32.37
  linux-image-3.19.0-32-lowlatency  3.19.0-32.37
  linux-image-3.19.0-32-powerpc-e500mc  3.19.0-32.37
  linux-image-3.19.0-32-powerpc-smp  3.19.0-32.37
  linux-image-3.19.0-32-powerpc64-emb  3.19.0-32.37
  linux-image-3.19.0-32-powerpc64-smp  3.19.0-32.37

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-2799-1

CVE-2015-2925, CVE-2015-5257

Severity
critical
Lowest
Low
Medium
High
Critical

November 05, 2015

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu kernel update instructions information disclosure security issues

Package Information

https://launchpad.net/ubuntu/+source/linux/3.19.0-32.37

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