Overly broad permissions can turn one compromised account into a much larger security problem. Learn how to reduce unnecessary access, review privileges, and apply least privilege across modern Linux systems. Review Linux Privileges×

Alerts This Week
Warning Icon 1 492
Alerts This Week
Warning Icon 1 492

Ubuntu 12.10: USN-1769-1 High: Kernel Flaws and DoS Risks

ubuntu
Calendar Grey March 18, 2013
Scroller Ubuntu
Multiple vulnerabilities resolved in Ubuntu's latest patch focusing on denial-of-service threats and additional security flaws identified in March 2013.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

Andrew Cooper of Citrix reported a Xen stack corruption in the Linux

kernel. An unprivileged user in a 32bit PVOPS guest can cause the guest

kernel to crash, or operate erroneously. (CVE-2013-0190)

A failure to validate input was discovered in the Linux kernel's Xen

netback (network backend) driver. A user in a guest OS may exploit this

flaw to cause a denial of service to the guest OS and other guest domains.

(CVE-2013-0216)

A memory leak was discovered in the Linux kernel's Xen netback (network

backend) driver. A user in a guest OS could trigger this flaw to cause a

denial of service on the system. (CVE-2013-0217)

A flaw was discovered in the Linux kernel Xen PCI backend driver. If a PCI

device is assigned to the guest OS, the guest OS could exploit this flaw to

cause a denial of service on the host. (CVE-2013-0231)

A flaw was reported in the perm...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory security issue exploit DoS Ubuntu kernel high

Update Instructions

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

Ubuntu 12.10:
  linux-image-3.5.0-26-generic    3.5.0-26.42
  linux-image-3.5.0-26-highbank   3.5.0-26.42
  linux-image-3.5.0-26-omap       3.5.0-26.42
  linux-image-3.5.0-26-powerpc-smp  3.5.0-26.42
  linux-image-3.5.0-26-powerpc64-smp  3.5.0-26.42

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-1769-1

CVE-2013-0190, CVE-2013-0216, CVE-2013-0217, CVE-2013-0231,

CVE-2013-0268, CVE-2013-0290, CVE-2013-0311, CVE-2013-0313,

CVE-2013-0349

March 18, 2013

Topics%20covered

Topics Covered

security advisory security issue exploit DoS Ubuntu kernel high

Package Information

https://launchpad.net/ubuntu/+source/linux/3.5.0-26.42

Get the latest News and Insights

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