Ubuntu Security Notice USN-263-1
13th March, 2006
linux-source-2.6.8.1/-2.6.10/-2.6.12 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 5.10
- Ubuntu 5.04
- Ubuntu 4.10
Details
A flaw was found in the module reference counting for loadable
protocol modules of netfilter. By performing particular socket
operations, a local attacker could exploit this to crash the kernel.
This flaw only affects Ubuntu 5.10. (CVE-2005-3359)
David Howells noticed a race condition in the add_key(), request_key()
and keyctl() functions. By modifying the length of string arguments
after the kernel determined their length, but before the kernel copied
them into kernel memory, a local attacker could either crash the
kernel or read random parts of kernel memory (which could potentially
contain sensitive data). (CVE-2006-0457)
An information disclosure vulnerability was discovered in the
ftruncate() function for the XFS file system. Under certain
conditions, this function could expose random unallocated blocks.
A local user could potentially exploit this to recover sensitive data
from previously deleted files. (CVE-2006-0554)
A local Denial of Service vulnerability was found in the NFS client
module. By opening a file on an NFS share with O_DIRECT and performing
some special operations on it, a local attacker could trigger a kernel
crash. (CVE-2006-0555)
The ELF binary loader did not sufficiently verify some addresses in
the ELF headers. By attempting to execute a specially crafted program,
a local attacker could exploit this to trigger a recursive loop of
kernel errors, which finally ended in a kernel crash. This only
affects the amd64 architecture on Intel processors (EMT64).
(CVE-2006-0741)
The die_if_kernel() function was incorrectly declared as "does never
return" on the ia64 platform. A local attacker could exploit this to
crash the kernel. Please note that ia64 is not an officially supported
platform. (CVE-2006-0742)
Oleg Nesterov discovered a race condition in the signal handling. On
multiprocessor (SMP) machines, a local attacker could exploit this to
create many unkillable processes, which could eventually lead to a
Denial of Service.
A memory leak was discovered in the handling of files which were
opened with the O_DIRECT flag. By repeatedly opening files in a
special way, a local attacker could eventually drain all available
kernel memory and render the machine unusable. This flaw only affects
Ubuntu 4.10.
(http://linux.bkbits.net:8080/linux-2.6/cset%404182a613oVsK0-8eCWpyYFrUf8rhLA)
Update instructions
The problem can be corrected by updating your system to the following package version:
- Ubuntu 5.10:
- linux-patch-ubuntu-2.6.10
- linux-image-2.6.12-10-powerpc-smp
- linux-patch-ubuntu-2.6.12
- linux-image-2.6.12-10-itanium-smp
- linux-image-2.6.8.1-6-power3-smp
- linux-image-2.6.8.1-6-amd64-k8-smp
- linux-image-2.6.10-6-686
- linux-image-2.6.10-6-powerpc
- linux-image-2.6.10-6-itanium
- linux-image-2.6.10-6-power4-smp
- linux-image-2.6.12-10-powerpc64-smp
- linux-image-2.6.8.1-6-k7
- linux-image-2.6.8.1-6-powerpc
- linux-image-2.6.12-10-amd64-generic
- linux-image-2.6.12-10-iseries-smp
- linux-image-2.6.12-10-k7-smp
- linux-image-2.6.8.1-6-amd64-xeon
- linux-image-2.6.12-10-amd64-xeon
- linux-image-2.6.8.1-6-power4
- linux-image-2.6.8.1-6-amd64-k8
- linux-image-2.6.10-6-386
- linux-image-2.6.8.1-6-power3
- linux-image-2.6.12-10-itanium
- linux-image-2.6.12-10-powerpc
- linux-image-2.6.10-6-amd64-xeon
- linux-image-2.6.12-10-mckinley
- linux-image-2.6.10-6-itanium-smp
- linux-image-2.6.10-6-powerpc-smp
- linux-image-2.6.10-6-power4
- linux-image-2.6.8.1-6-power4-smp
- linux-image-2.6.10-6-power3
- linux-image-2.6.8.1-6-386
- linux-image-2.6.8.1-6-powerpc-smp
- linux-image-2.6.10-6-k7
- linux-image-2.6.12-10-amd64-k8-smp
- linux-image-2.6.10-6-k7-smp
- linux-image-2.6.12-10-686
- linux-image-2.6.10-6-mckinley
- linux-image-2.6.12-10-686-smp
- linux-image-2.6.10-6-686-smp
- linux-image-2.6.8.1-6-amd64-generic
- linux-image-2.6.10-6-power3-smp
- linux-image-2.6.10-6-amd64-k8-smp
- linux-image-2.6.12-10-k7
- linux-image-2.6.10-6-amd64-generic
- linux-image-2.6.8.1-6-686
- linux-image-2.6.10-6-amd64-k8
- linux-image-2.6.12-10-mckinley-smp
- linux-image-2.6.8.1-6-686-smp
- linux-patch-debian-2.6.8.1
- linux-image-2.6.8.1-6-k7-smp
- linux-image-2.6.12-10-amd64-k8
- linux-image-2.6.10-6-mckinley-smp
- linux-image-2.6.12-10-386
- Ubuntu 5.04:
- linux-patch-ubuntu-2.6.10
- linux-image-2.6.12-10-powerpc-smp
- linux-patch-ubuntu-2.6.12
- linux-image-2.6.12-10-itanium-smp
- linux-image-2.6.8.1-6-power3-smp
- linux-image-2.6.8.1-6-amd64-k8-smp
- linux-image-2.6.10-6-686
- linux-image-2.6.10-6-powerpc
- linux-image-2.6.10-6-itanium
- linux-image-2.6.10-6-power4-smp
- linux-image-2.6.12-10-powerpc64-smp
- linux-image-2.6.8.1-6-k7
- linux-image-2.6.8.1-6-powerpc
- linux-image-2.6.12-10-amd64-generic
- linux-image-2.6.12-10-iseries-smp
- linux-image-2.6.12-10-k7-smp
- linux-image-2.6.8.1-6-amd64-xeon
- linux-image-2.6.12-10-amd64-xeon
- linux-image-2.6.8.1-6-power4
- linux-image-2.6.8.1-6-amd64-k8
- linux-image-2.6.10-6-386
- linux-image-2.6.8.1-6-power3
- linux-image-2.6.12-10-itanium
- linux-image-2.6.12-10-powerpc
- linux-image-2.6.10-6-amd64-xeon
- linux-image-2.6.12-10-mckinley
- linux-image-2.6.10-6-itanium-smp
- linux-image-2.6.10-6-powerpc-smp
- linux-image-2.6.10-6-power4
- linux-image-2.6.8.1-6-power4-smp
- linux-image-2.6.10-6-power3
- linux-image-2.6.8.1-6-386
- linux-image-2.6.8.1-6-powerpc-smp
- linux-image-2.6.10-6-k7
- linux-image-2.6.12-10-amd64-k8-smp
- linux-image-2.6.10-6-k7-smp
- linux-image-2.6.12-10-686
- linux-image-2.6.10-6-mckinley
- linux-image-2.6.12-10-686-smp
- linux-image-2.6.10-6-686-smp
- linux-image-2.6.8.1-6-amd64-generic
- linux-image-2.6.10-6-power3-smp
- linux-image-2.6.10-6-amd64-k8-smp
- linux-image-2.6.12-10-k7
- linux-image-2.6.10-6-amd64-generic
- linux-image-2.6.8.1-6-686
- linux-image-2.6.10-6-amd64-k8
- linux-image-2.6.12-10-mckinley-smp
- linux-image-2.6.8.1-6-686-smp
- linux-patch-debian-2.6.8.1
- linux-image-2.6.8.1-6-k7-smp
- linux-image-2.6.12-10-amd64-k8
- linux-image-2.6.10-6-mckinley-smp
- linux-image-2.6.12-10-386
- Ubuntu 4.10:
- linux-patch-ubuntu-2.6.10
- linux-image-2.6.12-10-powerpc-smp
- linux-patch-ubuntu-2.6.12
- linux-image-2.6.12-10-itanium-smp
- linux-image-2.6.8.1-6-power3-smp
- linux-image-2.6.8.1-6-amd64-k8-smp
- linux-image-2.6.10-6-686
- linux-image-2.6.10-6-powerpc
- linux-image-2.6.10-6-itanium
- linux-image-2.6.10-6-power4-smp
- linux-image-2.6.12-10-powerpc64-smp
- linux-image-2.6.8.1-6-k7
- linux-image-2.6.8.1-6-powerpc
- linux-image-2.6.12-10-amd64-generic
- linux-image-2.6.12-10-iseries-smp
- linux-image-2.6.12-10-k7-smp
- linux-image-2.6.8.1-6-amd64-xeon
- linux-image-2.6.12-10-amd64-xeon
- linux-image-2.6.8.1-6-power4
- linux-image-2.6.8.1-6-amd64-k8
- linux-image-2.6.10-6-386
- linux-image-2.6.8.1-6-power3
- linux-image-2.6.12-10-itanium
- linux-image-2.6.12-10-powerpc
- linux-image-2.6.10-6-amd64-xeon
- linux-image-2.6.12-10-mckinley
- linux-image-2.6.10-6-itanium-smp
- linux-image-2.6.10-6-powerpc-smp
- linux-image-2.6.10-6-power4
- linux-image-2.6.8.1-6-power4-smp
- linux-image-2.6.10-6-power3
- linux-image-2.6.8.1-6-386
- linux-image-2.6.8.1-6-powerpc-smp
- linux-image-2.6.10-6-k7
- linux-image-2.6.12-10-amd64-k8-smp
- linux-image-2.6.10-6-k7-smp
- linux-image-2.6.12-10-686
- linux-image-2.6.10-6-mckinley
- linux-image-2.6.12-10-686-smp
- linux-image-2.6.10-6-686-smp
- linux-image-2.6.8.1-6-amd64-generic
- linux-image-2.6.10-6-power3-smp
- linux-image-2.6.10-6-amd64-k8-smp
- linux-image-2.6.12-10-k7
- linux-image-2.6.10-6-amd64-generic
- linux-image-2.6.8.1-6-686
- linux-image-2.6.10-6-amd64-k8
- linux-image-2.6.12-10-mckinley-smp
- linux-image-2.6.8.1-6-686-smp
- linux-patch-debian-2.6.8.1
- linux-image-2.6.8.1-6-k7-smp
- linux-image-2.6.12-10-amd64-k8
- linux-image-2.6.10-6-mckinley-smp
- linux-image-2.6.12-10-386
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
None
References
CVE-2005-3359, CVE-2006-0457, CVE-2006-0554, CVE-2006-0555, CVE-2006-0741, CVE-2006-0742