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==========================================================================
Ubuntu Security Notice USN-1268-1
November 21, 2011
linux vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 8.04 LTS
Summary:
Several security issues were fixed in the kernel.
Software Description:
- linux: Linux kernel
Details:
It was discovered that CIFS incorrectly handled authentication. When a user
had a CIFS share mounted that required authentication, a local user could
mount the same share without knowing the correct password. (CVE-2011-1585)
It was discovered that the GRE protocol incorrectly handled netns
initialization. A remote attacker could send a packet while the ip_gre
module was loading, and crash the system, leading to a denial of service.
(CVE-2011-1767)
It was discovered that the IP/IP protocol incorrectly handled netns
initialization. A remote attacker could send a packet while the ipip module
was loading, and crash the system, leading to a denial of service.
(CVE-2011-1768)
Vasily Averin discovered that the NFS Lock Manager (NLM) incorrectly
handled unlock requests. A local attacker could exploit this to cause a
denial of service. (CVE-2011-2491)
Robert Swiecki discovered that mapping extensions were incorrectly handled.
A local attacker could exploit this to crash the system, leading to a
denial of service. (CVE-2011-2496)
Ben Pfaff discovered that Classless Queuing Disciplines (qdiscs) were being
incorrectly handled. A local attacker could exploit this to crash the
system, leading to a denial of service. (CVE-2011-2525)
Yasuaki Ishimatsu discovered a flaw in the kernel's clock implementation. A
local unprivileged attacker could exploit this causing a denial of service.
(CVE-2011-3209)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 8.04 LTS:
linux-image-2.6.24-30-386 2.6.24-30.96
linux-image-2.6.24-30-generic 2.6.24-30.96
linux-image-2.6.24-30-hppa32 2.6.24-30.96
linux-image-2.6.24-30-hppa64 2.6.24-30.96
linux-image-2.6.24-30-itanium 2.6.24-30.96
linux-image-2.6.24-30-lpia 2.6.24-30.96
linux-image-2.6.24-30-lpiacompat 2.6.24-30.96
linux-image-2.6.24-30-mckinley 2.6.24-30.96
linux-image-2.6.24-30-openvz 2.6.24-30.96
linux-image-2.6.24-30-powerpc 2.6.24-30.96
linux-image-2.6.24-30-powerpc-smp 2.6.24-30.96
linux-image-2.6.24-30-powerpc64-smp 2.6.24-30.96
linux-image-2.6.24-30-rt 2.6.24-30.96
linux-image-2.6.24-30-server 2.6.24-30.96
linux-image-2.6.24-30-sparc64 2.6.24-30.96
linux-image-2.6.24-30-sparc64-smp 2.6.24-30.96
linux-image-2.6.24-30-virtual 2.6.24-30.96
linux-image-2.6.24-30-xen 2.6.24-30.96
After a standard system update you need to reboot your computer to make
all the necessary changes.
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:
http://www.ubuntu.com/usn/usn-1268-1
CVE-2011-1585, CVE-2011-1767, CVE-2011-1768, CVE-2011-2491,
CVE-2011-2496, CVE-2011-2525, CVE-2011-3209
Package Information:
https://launchpad.net/ubuntu/+source/linux/2.6.24-30.96
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