USN-1090-1: Linux kernel vulnerabilities

18 March 2011

linux vulnerabilities

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

  • Ubuntu 10.10
  • Ubuntu 10.04 LTS

Summary

Multiple kernel vulnerabilities.

Software Description

  • linux - Linux kernel

Details

Dan Rosenberg discovered that multiple terminal ioctls did not correctly initialize structure memory. A local attacker could exploit this to read portions of kernel stack memory, leading to a loss of privacy. (CVE-2010-4075)

Dan Rosenberg discovered that the SCSI subsystem did not correctly validate iov segments. A local attacker with access to a SCSI device could send specially crafted requests to crash the system, leading to a denial of service. (CVE-2010-4163, CVE-2010-4668)

Update instructions

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

Ubuntu 10.10
linux-image-2.6.35-28-generic - 2.6.35-28.49
linux-image-2.6.35-28-generic-pae - 2.6.35-28.49
linux-image-2.6.35-28-omap - 2.6.35-28.49
linux-image-2.6.35-28-powerpc - 2.6.35-28.49
linux-image-2.6.35-28-powerpc-smp - 2.6.35-28.49
linux-image-2.6.35-28-powerpc64-smp - 2.6.35-28.49
linux-image-2.6.35-28-server - 2.6.35-28.49
linux-image-2.6.35-28-versatile - 2.6.35-28.49
linux-image-2.6.35-28-virtual - 2.6.35-28.49
Ubuntu 10.04 LTS
linux-image-2.6.32-30-386 - 2.6.32-30.59
linux-image-2.6.32-30-generic - 2.6.32-30.59
linux-image-2.6.32-30-generic-pae - 2.6.32-30.59
linux-image-2.6.32-30-ia64 - 2.6.32-30.59
linux-image-2.6.32-30-lpia - 2.6.32-30.59
linux-image-2.6.32-30-powerpc - 2.6.32-30.59
linux-image-2.6.32-30-powerpc-smp - 2.6.32-30.59
linux-image-2.6.32-30-powerpc64-smp - 2.6.32-30.59
linux-image-2.6.32-30-preempt - 2.6.32-30.59
linux-image-2.6.32-30-server - 2.6.32-30.59
linux-image-2.6.32-30-sparc64 - 2.6.32-30.59
linux-image-2.6.32-30-sparc64-smp - 2.6.32-30.59
linux-image-2.6.32-30-versatile - 2.6.32-30.59
linux-image-2.6.32-30-virtual - 2.6.32-30.59

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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