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Ubuntu 14.04 LTS High: Linux Kernel Denial Of Service Advisory

ubuntu
Calendar Grey July 24, 2015
Scroller Ubuntu Esm H88
Denial of service risks are addressed in Ubuntu kernel; update your system to fix several security issues.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

A flaw was discovered in the user space memory copying for the pipe iovecs

in the Linux kernel. An unprivileged local user could exploit this flaw to

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

privileges. (CVE-2015-1805)

A flaw was discovered in the kvm (kernel virtual machine) subsystem's

kvm_apic_has_events function. A unprivileged local user could exploit this

flaw to cause a denial of service (system crash). (CVE-2015-4692)

Daniel Borkmann reported a kernel crash in the Linux kernel's BPF filter

JIT optimization. A local attacker could exploit this flaw to cause a

denial of service (system crash). (CVE-2015-4700)

A flaw was discovered in how the Linux kernel handles invalid UDP

checksums. A remote attacker could exploit this flaw to cause a denial of

service using a flood of UDP packets with invalid checksums.

(CVE-2015...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service software update kernel ubuntu system crash linux kernel

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.13.0-58-generic   3.13.0-58.97
  linux-image-3.13.0-58-generic-lpae  3.13.0-58.97
  linux-image-3.13.0-58-lowlatency  3.13.0-58.97
  linux-image-3.13.0-58-powerpc-e500  3.13.0-58.97
  linux-image-3.13.0-58-powerpc-e500mc  3.13.0-58.97
  linux-image-3.13.0-58-powerpc-smp  3.13.0-58.97
  linux-image-3.13.0-58-powerpc64-emb  3.13.0-58.97
  linux-image-3.13.0-58-powerpc64-smp  3.13.0-58.97

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-2681-1

CVE-2015-1805, CVE-2015-4692, CVE-2015-4700, CVE-2015-5364,

CVE-2015-5366

July 23, 2015

Topics%20covered

Topics Covered

security advisory denial of service software update kernel ubuntu system crash linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux/3.13.0-58.97

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