USN-1092-1: Linux Kernel vulnerabilities

25 March 2011

linux-source-2.6.15 vulnerabilities

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

  • Ubuntu 6.06 LTS

Summary

A local attacker could exploit this to run programs with admininstrator privileges.

Software Description

  • linux-source-2.6.15 - ACPI support modules (udeb)

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-2010-4077)

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)

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

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

Ubuntu 6.06 LTS
linux-image-2.6.15-57-386 - 2.6.15-57.94
linux-image-2.6.15-57-686 - 2.6.15-57.94
linux-image-2.6.15-57-amd64-generic - 2.6.15-57.94
linux-image-2.6.15-57-amd64-k8 - 2.6.15-57.94
linux-image-2.6.15-57-amd64-server - 2.6.15-57.94
linux-image-2.6.15-57-amd64-xeon - 2.6.15-57.94
linux-image-2.6.15-57-hppa32 - 2.6.15-57.94
linux-image-2.6.15-57-hppa32-smp - 2.6.15-57.94
linux-image-2.6.15-57-hppa64 - 2.6.15-57.94
linux-image-2.6.15-57-hppa64-smp - 2.6.15-57.94
linux-image-2.6.15-57-itanium - 2.6.15-57.94
linux-image-2.6.15-57-itanium-smp - 2.6.15-57.94
linux-image-2.6.15-57-k7 - 2.6.15-57.94
linux-image-2.6.15-57-mckinley - 2.6.15-57.94
linux-image-2.6.15-57-mckinley-smp - 2.6.15-57.94
linux-image-2.6.15-57-powerpc - 2.6.15-57.94
linux-image-2.6.15-57-powerpc-smp - 2.6.15-57.94
linux-image-2.6.15-57-powerpc64-smp - 2.6.15-57.94
linux-image-2.6.15-57-server - 2.6.15-57.94
linux-image-2.6.15-57-server-bigiron - 2.6.15-57.94
linux-image-2.6.15-57-sparc64 - 2.6.15-57.94
linux-image-2.6.15-57-sparc64-smp - 2.6.15-57.94

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

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