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Ubuntu 14.10: USN-2616-1 Moderate: Kernel Race Condition and DoS

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: Linux kernel

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 DoS Ubuntu race condition kernel update instructions

Update Instructions

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

Ubuntu 14.10:
  linux-image-3.16.0-38-generic   3.16.0-38.52
  linux-image-3.16.0-38-generic-lpae  3.16.0-38.52
  linux-image-3.16.0-38-lowlatency  3.16.0-38.52
  linux-image-3.16.0-38-powerpc-e500mc  3.16.0-38.52
  linux-image-3.16.0-38-powerpc-smp  3.16.0-38.52
  linux-image-3.16.0-38-powerpc64-emb  3.16.0-38.52
  linux-image-3.16.0-38-powerpc64-smp  3.16.0-38.52

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-2616-1

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

May 20, 2015

Topics%20covered

Topics Covered

security advisory privilege escalation DoS Ubuntu race condition kernel update instructions

Package Information

https://launchpad.net/ubuntu/+source/linux/3.16.0-38.52

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