Explore top 10 tips to secure your open-source projects now. Read More

×
Alerts This Week
Warning Icon 1 536
Alerts This Week
Warning Icon 1 536

Ubuntu 14.04 LTS USN-2682-1 Moderate: Risks of Kernel DoS Attacks

ubuntu
Calendar Grey July 24, 2015
Scroller Ubuntu
Multiple vulnerabilities in the Ubuntu 14.04 LTS kernel have been addressed. Detailed update instructions and severity levels are provided.
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:

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)

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-2015-5364)

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

checksums. A remote attacker can cause a denial of service against

applications that use epoll by injecting a single packet with an invalid

checksum. (CVE-2015-5366)

Topics%20covered

Topics Covered

security advisory moderate denial of service kernel ubuntu

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.16.0-44-generic   3.16.0-44.59~14.04.1
  linux-image-3.16.0-44-generic-lpae  3.16.0-44.59~14.04.1
  linux-image-3.16.0-44-lowlatency  3.16.0-44.59~14.04.1
  linux-image-3.16.0-44-powerpc-e500mc  3.16.0-44.59~14.04.1
  linux-image-3.16.0-44-powerpc-smp  3.16.0-44.59~14.04.1
  linux-image-3.16.0-44-powerpc64-emb  3.16.0-44.59~14.04.1
  linux-image-3.16.0-44-powerpc64-smp  3.16.0-44.59~14.04.1

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-2682-1

CVE-2015-4692, CVE-2015-5364, CVE-2015-5366

Severity
important
Lowest
Low
Medium
High
Critical

July 23, 2015

Topics%20covered

Topics Covered

security advisory moderate denial of service kernel ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-44.59~14.04.1

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.