USN-346-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-346-1

14th September, 2006

linux-source-2.6.10/-2.6.12/-2.6.15 vulnerabilities

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

  • Ubuntu 6.06 LTS
  • Ubuntu 5.10
  • Ubuntu 5.04

Details

A Denial of service vulnerability was reported in iptables' SCTP
conntrack module. On computers which use this iptables module, a
remote attacker could expoit this to trigger a kernel crash.
(CVE-2006-2934)

A buffer overflow has been discovered in the dvd_read_bca() function.
By inserting a specially crafted DVD, USB stick, or similar
automatically mounted removable device, a local user could crash the
machine or potentially even execute arbitrary code with full root
privileges. (CVE-2006-2935)

The ftdi_sio driver for serial USB ports did not limit the amount of
pending data to be written. A local user could exploit this to drain
all available kernel memory and thus render the system unusable.
(CVE-2006-2936)

James McKenzie discovered a Denial of Service vulnerability in the NFS
driver. When exporting an ext3 file system over NFS, a remote attacker
could exploit this to trigger a file system panic by sending a
specially crafted UDP packet. (CVE-2006-3468)

Wei Wang of McAfee Avert Labs discovered a buffer overflow in the
sctp_make_abort_user() function of iptables' SCTP module. On computers
which use this module, a local attacker could expoit this to execute
arbitrary code with root privileges. (CVE-2006-3745)

Olof Johansson discovered that the kernel did not disable the 'HID0'
bit on PowerPC 970 processors so that the ATTN instruction was
enabled. A local user could exploit this to crash the kernel. This
flaw only affects the powerpc architecture. (CVE-2006-4093)

The UDF file system does not handle extends larger than 1 GB, but did
not check for this restriction on truncating files. A local user could
exploit this to crash the kernel. (CVE-2006-4145)

Update instructions

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

Ubuntu 6.06 LTS:
linux-image-2.6.15-26-hppa32-smp 2.6.15-26.47
linux-image-2.6.15-26-powerpc64-smp 2.6.15-26.47
linux-image-2.6.15-26-hppa64 2.6.15-26.47
linux-image-2.6.15-26-386 2.6.15-26.47
linux-image-2.6.15-26-amd64-xeon 2.6.15-26.47
linux-image-2.6.15-26-amd64-server 2.6.15-26.47
linux-image-2.6.15-26-amd64-k8 2.6.15-26.47
linux-source-2.6.15 2.6.15-26.47
linux-image-2.6.15-26-hppa64-smp 2.6.15-26.47
linux-image-2.6.15-26-k7 2.6.15-26.47
linux-image-2.6.15-26-server-bigiron 2.6.15-26.47
linux-image-2.6.15-26-powerpc 2.6.15-26.47
linux-image-2.6.15-26-mckinley-smp 2.6.15-26.47
linux-image-2.6.15-26-amd64-generic 2.6.15-26.47
linux-image-2.6.15-26-server 2.6.15-26.47
linux-image-2.6.15-26-mckinley 2.6.15-26.47
linux-image-2.6.15-26-itanium-smp 2.6.15-26.47
linux-image-2.6.15-26-hppa32 2.6.15-26.47
linux-image-2.6.15-26-686 2.6.15-26.47
linux-image-2.6.15-26-itanium 2.6.15-26.47
linux-image-2.6.15-26-powerpc-smp 2.6.15-26.47
linux-image-2.6.15-26-sparc64 2.6.15-26.47
linux-image-2.6.15-26-sparc64-smp 2.6.15-26.47
Ubuntu 5.10:
linux-image-2.6.12-10-powerpc-smp 2.6.12-10.39
linux-patch-ubuntu-2.6.12 2.6.12-10.39
linux-image-2.6.12-10-hppa32 2.6.12-10.39
linux-image-2.6.12-10-itanium-smp 2.6.12-10.39
linux-image-2.6.12-10-sparc64 2.6.12-10.39
linux-image-2.6.12-10-powerpc64-smp 2.6.12-10.39
linux-image-2.6.12-10-hppa64-smp 2.6.12-10.39
linux-image-2.6.12-10-amd64-generic 2.6.12-10.39
linux-image-2.6.12-10-iseries-smp 2.6.12-10.39
linux-image-2.6.12-10-k7-smp 2.6.12-10.39
linux-image-2.6.12-10-amd64-xeon 2.6.12-10.39
linux-image-2.6.12-10-itanium 2.6.12-10.39
linux-image-2.6.12-10-hppa32-smp 2.6.12-10.39
linux-image-2.6.12-10-powerpc 2.6.12-10.39
linux-image-2.6.12-10-mckinley 2.6.12-10.39
linux-image-2.6.12-10-sparc64-smp 2.6.12-10.39
linux-image-2.6.12-10-hppa64 2.6.12-10.39
linux-image-2.6.12-10-amd64-k8-smp 2.6.12-10.39
linux-image-2.6.12-10-686 2.6.12-10.39
linux-image-2.6.12-10-686-smp 2.6.12-10.39
linux-image-2.6.12-10-k7 2.6.12-10.39
linux-image-2.6.12-10-mckinley-smp 2.6.12-10.39
linux-image-2.6.12-10-386 2.6.12-10.39
linux-image-2.6.12-10-amd64-k8 2.6.12-10.39
Ubuntu 5.04:
linux-patch-ubuntu-2.6.10 2.6.10-34.23
linux-image-2.6.10-6-686 2.6.10-34.23
linux-image-2.6.10-6-powerpc 2.6.10-34.23
linux-image-2.6.10-6-itanium 2.6.10-34.23
linux-image-2.6.10-6-power4-smp 2.6.10-34.23
linux-image-2.6.10-6-sparc64-smp 2.6.10-34.23
linux-image-2.6.10-6-hppa64-smp 2.6.10-34.23
linux-image-2.6.10-6-power3-smp 2.6.10-34.23
linux-image-2.6.10-6-hppa32-smp 2.6.10-34.23
linux-image-2.6.10-6-386 2.6.10-34.23
linux-image-2.6.10-6-hppa32 2.6.10-34.23
linux-image-2.6.10-6-sparc64 2.6.10-34.23
linux-image-2.6.10-6-hppa64 2.6.10-34.23
linux-image-2.6.10-6-amd64-xeon 2.6.10-34.23
linux-image-2.6.10-6-itanium-smp 2.6.10-34.23
linux-image-2.6.10-6-powerpc-smp 2.6.10-34.23
linux-image-2.6.10-6-k7-smp 2.6.10-34.23
linux-image-2.6.10-6-power3 2.6.10-34.23
linux-image-2.6.10-6-k7 2.6.10-34.23
linux-image-2.6.10-6-power4 2.6.10-34.23
linux-image-2.6.10-6-mckinley 2.6.10-34.23
linux-image-2.6.10-6-686-smp 2.6.10-34.23
linux-image-2.6.10-6-amd64-k8-smp 2.6.10-34.23
linux-image-2.6.10-6-amd64-generic 2.6.10-34.23
linux-image-2.6.10-6-amd64-k8 2.6.10-34.23
linux-image-2.6.10-6-mckinley-smp 2.6.10-34.23

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.

References

CVE-2006-2934, CVE-2006-2935, CVE-2006-2936, CVE-2006-3468, CVE-2006-3745, CVE-2006-4093, CVE-2006-4145