USN-2226-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-2226-1

27th May, 2014

linux vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

• Ubuntu 14.04 LTS

Summary

Several security issues were fixed in the kernel.

Software description

• linux - Linux kernel

Details

Matthew Daley reported an information leak in the floppy disk driver of the

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

potentially sensitive information from kernel memory. (CVE-2014-1738)

Matthew Daley reported a flaw in the handling of ioctl commands by the

floppy disk driver in the Linux kernel. An unprivileged local user could

exploit this flaw to gain administrative privileges if the floppy disk

module is loaded. (CVE-2014-1737)

A flaw was discovered in the handling of network packets when mergeable

buffers are disabled for virtual machines in the Linux kernel. Guest OS

users may exploit this flaw to cause a denial of service (host OS crash) or

possibly gain privilege on the host OS. (CVE-2014-0077)

A flaw was discovered in the Linux kernel's ping sockets. An unprivileged

local user could exploit this flaw to cause a denial of service (system

crash) or possibly gain privileges via a crafted application.

(CVE-2014-2851)

Update instructions

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

Ubuntu 14.04 LTS:

linux-image-3.13.0-27-generic 3.13.0-27.50

linux-image-3.13.0-27-generic-lpae 3.13.0-27.50

linux-image-3.13.0-27-powerpc-e500 3.13.0-27.50

linux-image-3.13.0-27-lowlatency 3.13.0-27.50

linux-image-3.13.0-27-powerpc-smp 3.13.0-27.50

linux-image-3.13.0-27-powerpc-e500mc 3.13.0-27.50

linux-image-3.13.0-27-powerpc64-emb 3.13.0-27.50

linux-image-3.13.0-27-powerpc64-smp 3.13.0-27.50

To update your system, please follow these instructions: http://bit.ly/1aJDvTw.

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

CVE-2014-0077, CVE-2014-1737, CVE-2014-1738, CVE-2014-2851

via Ubuntu Security Notices http://bit.ly/1pdjOxZ