USN-807-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-807-1

28th July, 2009

linux, linux-source-2.6.15 vulnerabilities

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

Ubuntu 9.04
Ubuntu 8.10
Ubuntu 8.04 LTS
Ubuntu 6.06 LTS

Software description

linux
linux-source-2.6.15

Details

Michael Tokarev discovered that the RTL8169 network driver did not
correctly validate buffer sizes. A remote attacker on the local network
could send specially crafted traffic that would crash the system or
potentially grant elevated privileges. (CVE-2009-1389)

Julien Tinnes and Tavis Ormandy discovered that when executing setuid
processes the kernel did not clear certain personality flags. A local
attacker could exploit this to map the NULL memory page, causing other
vulnerabilities to become exploitable. Ubuntu 6.06 was not affected.
(CVE-2009-1895)

Matt T. Yourst discovered that KVM did not correctly validate the
page table root. A local attacker could exploit this to crash the
system, leading to a denial of service. Ubuntu 6.06 was not affected.
(CVE-2009-2287)

Ramon de Carvalho Valle discovered that eCryptfs did not correctly
validate certain buffer sizes. A local attacker could create specially
crafted eCryptfs files to crash the system or gain elevated privileges.
Ubuntu 6.06 was not affected. (CVE-2009-2406, CVE-2009-2407)

Update instructions

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

Ubuntu 9.04:: linux-image-2.6.28-14-ixp4xx 2.6.28-14.47; linux-image-2.6.28-14-server 2.6.28-14.47; linux-image-2.6.28-14-imx51 2.6.28-14.47; linux-image-2.6.28-14-iop32x 2.6.28-14.47; linux-image-2.6.28-14-lpia 2.6.28-14.47; linux-image-2.6.28-14-generic 2.6.28-14.47; linux-image-2.6.28-14-versatile 2.6.28-14.47; linux-image-2.6.28-14-virtual 2.6.28-14.47
Ubuntu 8.10:: linux-image-2.6.27-14-generic 2.6.27-14.37; linux-image-2.6.27-14-server 2.6.27-14.37; linux-image-2.6.27-14-virtual 2.6.27-14.37
Ubuntu 8.04 LTS:: linux-image-2.6.24-24-sparc64 2.6.24-24.57; linux-image-2.6.24-24-server 2.6.24-24.57; linux-image-2.6.24-24-itanium 2.6.24-24.57; linux-image-2.6.24-24-lpiacompat 2.6.24-24.57; linux-image-2.6.24-24-hppa64 2.6.24-24.57; linux-image-2.6.24-24-rt 2.6.24-24.57; linux-image-2.6.24-24-powerpc64-smp 2.6.24-24.57; linux-image-2.6.24-24-386 2.6.24-24.57; linux-image-2.6.24-24-generic 2.6.24-24.57; linux-image-2.6.24-24-xen 2.6.24-24.57; linux-image-2.6.24-24-powerpc-smp 2.6.24-24.57; linux-image-2.6.24-24-virtual 2.6.24-24.57; linux-image-2.6.24-24-hppa32 2.6.24-24.57; linux-image-2.6.24-24-lpia 2.6.24-24.57; linux-image-2.6.24-24-mckinley 2.6.24-24.57; linux-image-2.6.24-24-sparc64-smp 2.6.24-24.57; linux-image-2.6.24-24-powerpc 2.6.24-24.57; linux-image-2.6.24-24-openvz 2.6.24-24.57
Ubuntu 6.06 LTS:: linux-image-2.6.15-54-hppa64 2.6.15-54.78; linux-image-2.6.15-54-hppa32-smp 2.6.15-54.78; linux-image-2.6.15-54-server-bigiron 2.6.15-54.78; linux-image-2.6.15-54-amd64-generic 2.6.15-54.78; linux-image-2.6.15-54-itanium 2.6.15-54.78; linux-image-2.6.15-54-k7 2.6.15-54.78; linux-image-2.6.15-54-powerpc-smp 2.6.15-54.78; linux-image-2.6.15-54-server 2.6.15-54.78; linux-image-2.6.15-54-hppa32 2.6.15-54.78; linux-image-2.6.15-54-sparc64-smp 2.6.15-54.78; linux-image-2.6.15-54-sparc64 2.6.15-54.78; linux-image-2.6.15-54-mckinley-smp 2.6.15-54.78; linux-image-2.6.15-54-amd64-k8 2.6.15-54.78; linux-image-2.6.15-54-386 2.6.15-54.78; linux-image-2.6.15-54-mckinley 2.6.15-54.78; linux-image-2.6.15-54-amd64-server 2.6.15-54.78; linux-image-2.6.15-54-amd64-xeon 2.6.15-54.78; linux-image-2.6.15-54-powerpc 2.6.15-54.78; linux-image-2.6.15-54-powerpc64-smp 2.6.15-54.78; linux-image-2.6.15-54-itanium-smp 2.6.15-54.78; linux-image-2.6.15-54-686 2.6.15-54.78; linux-image-2.6.15-54-hppa64-smp 2.6.15-54.78

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

After a standard system upgrade you need to reboot your computer to
effect the necessary changes.

ATTENTION: Due to an unavoidable ABI change for Ubuntu 9.04 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-2009-1389, CVE-2009-1895, CVE-2009-2287, CVE-2009-2406, CVE-2009-2407