USN-331-1: Linux kernel vulnerabilities

3 August 2006

linux-source-2.6.15 vulnerabilities

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

  • Ubuntu 6.06 LTS

Software Description

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)

Additionally, this update fixes a range of bugs.

Update instructions

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

Ubuntu 6.06 LTS
linux-image-2.6.15-26-386 - 2.6.15-26.46
linux-image-2.6.15-26-686 - 2.6.15-26.46
linux-image-2.6.15-26-amd64-generic - 2.6.15-26.46
linux-image-2.6.15-26-amd64-k8 - 2.6.15-26.46
linux-image-2.6.15-26-amd64-server - 2.6.15-26.46
linux-image-2.6.15-26-amd64-xeon - 2.6.15-26.46
linux-image-2.6.15-26-hppa32 - 2.6.15-26.46
linux-image-2.6.15-26-hppa32-smp - 2.6.15-26.46
linux-image-2.6.15-26-hppa64 - 2.6.15-26.46
linux-image-2.6.15-26-hppa64-smp - 2.6.15-26.46
linux-image-2.6.15-26-itanium - 2.6.15-26.46
linux-image-2.6.15-26-itanium-smp - 2.6.15-26.46
linux-image-2.6.15-26-k7 - 2.6.15-26.46
linux-image-2.6.15-26-mckinley - 2.6.15-26.46
linux-image-2.6.15-26-mckinley-smp - 2.6.15-26.46
linux-image-2.6.15-26-powerpc - 2.6.15-26.46
linux-image-2.6.15-26-powerpc-smp - 2.6.15-26.46
linux-image-2.6.15-26-powerpc64-smp - 2.6.15-26.46
linux-image-2.6.15-26-server - 2.6.15-26.46
linux-image-2.6.15-26-server-bigiron - 2.6.15-26.46
linux-image-2.6.15-26-sparc64 - 2.6.15-26.46
linux-image-2.6.15-26-sparc64-smp - 2.6.15-26.46

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.

Please note that Ubuntu 5.04 and 5.10 are also affected by these flaws. An update is in preparation and will be released shortly.

References