1. Ubuntu Security Notices
  2. USN-1089-1

USN-1089-1: Linux kernel vulnerabilities

Publication date

18 March 2011

Overview

Multiple kernel vulnerabilities.

Releases

Packages

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, CVE-2010-4076, CVE-2010-4077)

Dan Rosenberg discovered that the socket filters did not correctly
initialize structure memory. A local attacker could create malicious
filters to read portions of kernel stack memory, leading to a loss of
privacy. (CVE-2010-4158)

Dan Rosenberg discovered that certain iovec operations did not calculate
page counts correctly. A local attacker could exploit this to crash the
system, leading to a denial of service. (CVE-2010-4162)

Dan Rosenberg discovered that the SCSI subsystem did not...

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, CVE-2010-4076, CVE-2010-4077)

Dan Rosenberg discovered that the socket filters did not correctly
initialize structure memory. A local attacker could create malicious
filters to read portions of kernel stack memory, leading to a loss of
privacy. (CVE-2010-4158)

Dan Rosenberg discovered that certain iovec operations did not calculate
page counts correctly. A local attacker could exploit this to crash the
system, leading to a denial of service. (CVE-2010-4162)

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)

Dan Rosenberg discovered that the RDS protocol did not correctly check
ioctl arguments. A local attacker could exploit this to crash the system,
leading to a denial of service. (CVE-2010-4175)

Alan Cox discovered that the HCI UART driver did not correctly check if
a write operation was available. If the mmap_min-addr sysctl was changed
from the Ubuntu default to a value of 0, a local attacker could exploit
this flaw to gain root privileges. (CVE-2010-4242)

Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

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.

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

Ubuntu Release Package Version
9.10 karmic linux-image-2.6.31-23-generic –  2.6.31-23.74
linux-image-2.6.31-23-sparc64-smp –  2.6.31-23.74
linux-image-2.6.31-23-powerpc-smp –  2.6.31-23.74
linux-image-2.6.31-23-powerpc64-smp –  2.6.31-23.74
linux-image-2.6.31-308-ec2 –  2.6.31-308.28
linux-image-2.6.31-23-virtual –  2.6.31-23.74
linux-image-2.6.31-23-generic-pae –  2.6.31-23.74
linux-image-2.6.31-23-lpia –  2.6.31-23.74
linux-image-2.6.31-23-powerpc –  2.6.31-23.74
linux-image-2.6.31-23-sparc64 –  2.6.31-23.74
linux-image-2.6.31-23-server –  2.6.31-23.74
linux-image-2.6.31-23-ia64 –  2.6.31-23.74
linux-image-2.6.31-23-386 –  2.6.31-23.74

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References

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