USN-659-1: Linux kernel vulnerabilities

27 October 2008

linux, linux-source-2.6.1522 vulnerabilities

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

  • Ubuntu 8.04 LTS
  • Ubuntu 7.10
  • Ubuntu 6.06 LTS

Software Description

  • linux
  • linux-source-2.6.22
  • linux-source-2.6.15

Details

It was discovered that the direct-IO subsystem did not correctly validate certain structures. A local attacker could exploit this to cause a system crash, leading to a denial of service. (CVE-2007-6716)

It was discovered that the disabling of the ZERO_PAGE optimization could lead to large memory consumption. A local attacker could exploit this to allocate all available memory, leading to a denial of service. (CVE-2008-2372)

It was discovered that the Datagram Congestion Control Protocol (DCCP) did not correctly validate its arguments. If DCCP was in use, a remote attacker could send specially crafted network traffic and cause a system crash, leading to a denial of service. (CVE-2008-3276)

It was discovered that the SBNI WAN driver did not correctly check for the NET_ADMIN capability. A malicious local root user lacking CAP_NET_ADMIN would be able to change the WAN device configuration, leading to a denial of service. (CVE-2008-3525)

It was discovered that the Stream Control Transmission Protocol (SCTP) did not correctly validate the key length in the SCTP_AUTH_KEY option. If SCTP is in use, a remote attacker could send specially crafted network traffic that would crash the system, leading to a denial of service. (CVE-2008-3526)

It was discovered that the tmpfs implementation did not correctly handle certain sequences of inode operations. A local attacker could exploit this to crash the system, leading to a denial of service. (CVE-2008-3534)

It was discovered that the readv/writev functions did not correctly handle certain sequences of file operations. A local attacker could exploit this to crash the system, leading to a denial of service. (CVE-2008-3535)

It was discovered that SCTP did not correctly validate its userspace arguments. A local attacker could call certain sctp_* functions with malicious options and cause a system crash, leading to a denial of service. (CVE-2008-3792, CVE-2008-4113, CVE-2008-4445)

It was discovered the the i915 video driver did not correctly validate memory addresses. A local attacker could exploit this to remap memory that could cause a system crash, leading to a denial of service. (CVE-2008-3831)

Johann Dahm and David Richter discovered that NFSv4 did not correctly handle certain file ACLs. If NFSv4 is in use, a local attacker could create a malicious ACL that could cause a system crash, leading to a denial of service. (CVE-2008-3915)

Update instructions

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

Ubuntu 8.04 LTS
linux-image-2.6.24-21-386 - 2.6.24-21.43
linux-image-2.6.24-21-generic - 2.6.24-21.43
linux-image-2.6.24-21-hppa32 - 2.6.24-21.43
linux-image-2.6.24-21-hppa64 - 2.6.24-21.43
linux-image-2.6.24-21-itanium - 2.6.24-21.43
linux-image-2.6.24-21-lpia - 2.6.24-21.43
linux-image-2.6.24-21-lpiacompat - 2.6.24-21.43
linux-image-2.6.24-21-mckinley - 2.6.24-21.43
linux-image-2.6.24-21-openvz - 2.6.24-21.43
linux-image-2.6.24-21-powerpc - 2.6.24-21.43
linux-image-2.6.24-21-powerpc-smp - 2.6.24-21.43
linux-image-2.6.24-21-powerpc64-smp - 2.6.24-21.43
linux-image-2.6.24-21-rt - 2.6.24-21.43
linux-image-2.6.24-21-server - 2.6.24-21.43
linux-image-2.6.24-21-sparc64 - 2.6.24-21.43
linux-image-2.6.24-21-sparc64-smp - 2.6.24-21.43
linux-image-2.6.24-21-virtual - 2.6.24-21.43
linux-image-2.6.24-21-xen - 2.6.24-21.43
Ubuntu 7.10
linux-image-2.6.22-15-386 - 2.6.22-15.59
linux-image-2.6.22-15-cell - 2.6.22-15.59
linux-image-2.6.22-15-generic - 2.6.22-15.59
linux-image-2.6.22-15-hppa32 - 2.6.22-15.59
linux-image-2.6.22-15-hppa64 - 2.6.22-15.59
linux-image-2.6.22-15-itanium - 2.6.22-15.59
linux-image-2.6.22-15-lpia - 2.6.22-15.59
linux-image-2.6.22-15-lpiacompat - 2.6.22-15.59
linux-image-2.6.22-15-mckinley - 2.6.22-15.59
linux-image-2.6.22-15-powerpc - 2.6.22-15.59
linux-image-2.6.22-15-powerpc-smp - 2.6.22-15.59
linux-image-2.6.22-15-powerpc64-smp - 2.6.22-15.59
linux-image-2.6.22-15-rt - 2.6.22-15.59
linux-image-2.6.22-15-server - 2.6.22-15.59
linux-image-2.6.22-15-sparc64 - 2.6.22-15.59
linux-image-2.6.22-15-sparc64-smp - 2.6.22-15.59
linux-image-2.6.22-15-ume - 2.6.22-15.59
linux-image-2.6.22-15-virtual - 2.6.22-15.59
linux-image-2.6.22-15-xen - 2.6.22-15.59
Ubuntu 6.06 LTS
linux-image-2.6.15-52-386 - 2.6.15-52.73
linux-image-2.6.15-52-686 - 2.6.15-52.73
linux-image-2.6.15-52-amd64-generic - 2.6.15-52.73
linux-image-2.6.15-52-amd64-k8 - 2.6.15-52.73
linux-image-2.6.15-52-amd64-server - 2.6.15-52.73
linux-image-2.6.15-52-amd64-xeon - 2.6.15-52.73
linux-image-2.6.15-52-hppa32 - 2.6.15-52.73
linux-image-2.6.15-52-hppa32-smp - 2.6.15-52.73
linux-image-2.6.15-52-hppa64 - 2.6.15-52.73
linux-image-2.6.15-52-hppa64-smp - 2.6.15-52.73
linux-image-2.6.15-52-itanium - 2.6.15-52.73
linux-image-2.6.15-52-itanium-smp - 2.6.15-52.73
linux-image-2.6.15-52-k7 - 2.6.15-52.73
linux-image-2.6.15-52-mckinley - 2.6.15-52.73
linux-image-2.6.15-52-mckinley-smp - 2.6.15-52.73
linux-image-2.6.15-52-powerpc - 2.6.15-52.73
linux-image-2.6.15-52-powerpc-smp - 2.6.15-52.73
linux-image-2.6.15-52-powerpc64-smp - 2.6.15-52.73
linux-image-2.6.15-52-server - 2.6.15-52.73
linux-image-2.6.15-52-server-bigiron - 2.6.15-52.73
linux-image-2.6.15-52-sparc64 - 2.6.15-52.73
linux-image-2.6.15-52-sparc64-smp - 2.6.15-52.73

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: For systems without the hardy-updates pocket enabled, the 8.04 kernel update will include an unavoidable ABI change. The kernel update has 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-386, linux-powerpc, linux-amd64-generic), a standard system upgrade will automatically perform this as well.

References