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Ubuntu 14.04 LTS USN-2615-1: Critical Kernel Issues and Fixes

ubuntu
Calendar Grey May 20, 2015
Dist Ubuntu Esm H88
=========================================================================Ubuntu Security Notice USN-
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-lts-utopic: Linux hardware enablement kernel from Utopic

Details:

Alexandre Oliva reported a race condition flaw in the btrfs file system's

handling of extended attributes (xattrs). A local attacker could exploit

this flaw to bypass ACLs and potentially escalate privileges.

(CVE-2014-9710)

A memory corruption issue was discovered in AES decryption when using the

Intel AES-NI accelerated code path. A remote attacker could exploit this

flaw to cause a denial of service (system crash) or potentially escalate

privileges on Intel base machines with AEC-GCM mode IPSec security

association. (CVE-2015-3331)

A flaw was discovered in the Linux kernel's IPv4 networking when using TCP

fast open to initiate a connection. An unprivileged local user could

exploit this flaw to cause a denial of service (system crash).

(CVE-2015-3332)

Topics%20covered

Topics Covered

security advisory privilege escalation memory corruption race condition kernel ubuntu system crash

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.16.0-38-generic   3.16.0-38.52~14.04.1
  linux-image-3.16.0-38-generic-lpae  3.16.0-38.52~14.04.1
  linux-image-3.16.0-38-lowlatency  3.16.0-38.52~14.04.1
  linux-image-3.16.0-38-powerpc-e500mc  3.16.0-38.52~14.04.1
  linux-image-3.16.0-38-powerpc-smp  3.16.0-38.52~14.04.1
  linux-image-3.16.0-38-powerpc64-emb  3.16.0-38.52~14.04.1
  linux-image-3.16.0-38-powerpc64-smp  3.16.0-38.52~14.04.1

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-2615-1

CVE-2014-9710, CVE-2015-3331, CVE-2015-3332

Severity
critical
Lowest
Low
Medium
High
Critical

May 20, 2015

Topics%20covered

Topics Covered

security advisory privilege escalation memory corruption race condition kernel ubuntu system crash

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-38.52~14.04.1

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