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Ubuntu 14.04 LTS USN-2663-1 Critical: Multiple Kernel Flaws

ubuntu
Calendar Grey July 7, 2015
Scroller Ubuntu Esm H88
The advisory USN-2663-1 addresses vulnerabilities in the Linux kernel that impact Ubuntu 14.04 LTS and provides measures to mitigate these risks.
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 race condition was discovered in the Linux kernel's file_handle size

verification. A local user could exploit this flaw to read potentially

sensative memory locations. (CVE-2015-1420)

A underflow error was discovered in the Linux kernel's Ozmo Devices USB

over WiFi host controller driver. A remote attacker could exploit this flaw

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

arbitrary code via a specially crafted packet. (CVE-2015-4001)

A bounds check error was discovered in the Linux kernel's Ozmo Devices USB

over WiFi host controller driver. A remote attacker could exploit this flaw

to cause a denial of se...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical local issue race condition kernel ubuntu

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.13.0-57-generic   3.13.0-57.95
  linux-image-3.13.0-57-generic-lpae  3.13.0-57.95
  linux-image-3.13.0-57-lowlatency  3.13.0-57.95
  linux-image-3.13.0-57-powerpc-e500  3.13.0-57.95
  linux-image-3.13.0-57-powerpc-e500mc  3.13.0-57.95
  linux-image-3.13.0-57-powerpc-smp  3.13.0-57.95
  linux-image-3.13.0-57-powerpc64-emb  3.13.0-57.95
  linux-image-3.13.0-57-powerpc64-smp  3.13.0-57.95

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-2663-1

CVE-2014-9710, CVE-2015-1420, CVE-2015-4001, CVE-2015-4002,

CVE-2015-4003, CVE-2015-4167

Severity
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July 07, 2015

Topics%20covered

Topics Covered

security advisory denial of service critical local issue race condition kernel ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux/3.13.0-57.95

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