USN-2564-1: Linux kernel (Utopic HWE) vulnerabilities

Ubuntu Security Notice USN-2564-1


9th April, 2015


linux-lts-utopic 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-lts-utopic - Linux hardware enablement kernel from Utopic


Details


An integer overflow was discovered in the stack randomization feature of

the Linux kernel on 64 bit platforms. A local attacker could exploit this

flaw to bypass the Address Space Layout Randomization (ASLR) protection

mechanism. (CVE-2015-1593)


An information leak was discovered in the Linux Kernel's handling of

userspace configuration of the link layer control (LLC). A local user could

exploit this flaw to read data from other sysctl settings. (CVE-2015-2041)


An information leak was discovered in how the Linux kernel handles setting

the Reliable Datagram Sockets (RDS) settings. A local user could exploit

this flaw to read data from other sysctl settings. (CVE-2015-2042)


Update instructions


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



Ubuntu 14.04 LTS:

linux-image-3.16.0-34-generic-lpae 3.16.0-34.45~14.04.1

linux-image-3.16.0-34-lowlatency 3.16.0-34.45~14.04.1

linux-image-3.16.0-34-generic 3.16.0-34.45~14.04.1

linux-image-3.16.0-34-powerpc64-emb 3.16.0-34.45~14.04.1

linux-image-3.16.0-34-powerpc-smp 3.16.0-34.45~14.04.1

linux-image-3.16.0-34-powerpc64-smp 3.16.0-34.45~14.04.1

linux-image-3.16.0-34-powerpc-e500mc 3.16.0-34.45~14.04.1


To update your system, please follow these instructions: http://ift.tt/17VXqjU.


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-2015-1593, CVE-2015-2041, CVE-2015-2042






from Ubuntu Security Notices http://ift.tt/1Ckuygw