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USN-2560-1: Linux kernel vulnerabilities

08 April 2015

Several security issues were fixed in the kernel.




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 versions:

Ubuntu 12.04

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.

Related notices

  • USN-2561-1: linux-ti-omap4, linux-image-3.2.0-1462-omap4
  • USN-2563-1: linux-image-3.13.0-49-powerpc64-emb, linux-image-3.13.0-49-generic, linux-image-extra-3.13.0-49-generic, linux-image-3.13.0-49-generic-lpae, linux-image-3.13.0-49-powerpc64-smp, linux-image-3.13.0-49-powerpc-smp, linux, linux-image-3.13.0-49-powerpc-e500, linux-image-3.13.0-49-lowlatency, linux-image-3.13.0-49-powerpc-e500mc
  • USN-2564-1: linux-image-3.16.0-34-generic-lpae, linux-image-3.16.0-34-powerpc-e500mc, linux-image-3.16.0-34-generic, linux-image-3.16.0-34-powerpc64-emb, linux-image-3.16.0-34-powerpc64-smp, linux-image-3.16.0-34-lowlatency, linux-image-3.16.0-34-powerpc-smp, linux-lts-utopic, linux-image-extra-3.16.0-34-generic
  • USN-2562-1: linux-image-3.13.0-49-generic, linux-image-3.13.0-49-generic-lpae, linux-lts-trusty
  • USN-2565-1: linux-image-3.16.0-34-generic-lpae, linux-image-3.16.0-34-powerpc-e500mc, linux-image-3.16.0-34-generic, linux-image-3.16.0-34-powerpc-smp, linux-image-3.16.0-34-powerpc64-emb, linux-image-3.16.0-34-powerpc64-smp, linux, linux-image-3.16.0-34-lowlatency