USN-807-1: Linux kernel vulnerabilities

28 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 versions:

Ubuntu 9.04
linux-image-2.6.28-14-generic - 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-ixp4xx - 2.6.28-14.47
linux-image-2.6.28-14-lpia - 2.6.28-14.47
linux-image-2.6.28-14-server - 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-2.6.24-24-386 - 2.6.24-24.57
linux-image-2.6.24-24-generic - 2.6.24-24.57
linux-image-2.6.24-24-hppa32 - 2.6.24-24.57
linux-image-2.6.24-24-hppa64 - 2.6.24-24.57
linux-image-2.6.24-24-itanium - 2.6.24-24.57
linux-image-2.6.24-24-lpia - 2.6.24-24.57
linux-image-2.6.24-24-lpiacompat - 2.6.24-24.57
linux-image-2.6.24-24-mckinley - 2.6.24-24.57
linux-image-2.6.24-24-openvz - 2.6.24-24.57
linux-image-2.6.24-24-powerpc - 2.6.24-24.57
linux-image-2.6.24-24-powerpc-smp - 2.6.24-24.57
linux-image-2.6.24-24-powerpc64-smp - 2.6.24-24.57
linux-image-2.6.24-24-rt - 2.6.24-24.57
linux-image-2.6.24-24-server - 2.6.24-24.57
linux-image-2.6.24-24-sparc64 - 2.6.24-24.57
linux-image-2.6.24-24-sparc64-smp - 2.6.24-24.57
linux-image-2.6.24-24-virtual - 2.6.24-24.57
linux-image-2.6.24-24-xen - 2.6.24-24.57
Ubuntu 6.06 LTS
linux-image-2.6.15-54-386 - 2.6.15-54.78
linux-image-2.6.15-54-686 - 2.6.15-54.78
linux-image-2.6.15-54-amd64-generic - 2.6.15-54.78
linux-image-2.6.15-54-amd64-k8 - 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-hppa32 - 2.6.15-54.78
linux-image-2.6.15-54-hppa32-smp - 2.6.15-54.78
linux-image-2.6.15-54-hppa64 - 2.6.15-54.78
linux-image-2.6.15-54-hppa64-smp - 2.6.15-54.78
linux-image-2.6.15-54-itanium - 2.6.15-54.78
linux-image-2.6.15-54-itanium-smp - 2.6.15-54.78
linux-image-2.6.15-54-k7 - 2.6.15-54.78
linux-image-2.6.15-54-mckinley - 2.6.15-54.78
linux-image-2.6.15-54-mckinley-smp - 2.6.15-54.78
linux-image-2.6.15-54-powerpc - 2.6.15-54.78
linux-image-2.6.15-54-powerpc-smp - 2.6.15-54.78
linux-image-2.6.15-54-powerpc64-smp - 2.6.15-54.78
linux-image-2.6.15-54-server - 2.6.15-54.78
linux-image-2.6.15-54-server-bigiron - 2.6.15-54.78
linux-image-2.6.15-54-sparc64 - 2.6.15-54.78
linux-image-2.6.15-54-sparc64-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