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Today's Topics:
1. [USN-1363-1] Linux kernel vulnerabilities (John Johansen)
2. [USN-1364-1] Linux kernel (OMAP4) vulnerabilities (John Johansen)
----------------------------------------------------------------------
Message: 1
Date: Mon, 13 Feb 2012 11:30:30 -0800
From: John Johansen <john.johansen@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1363-1] Linux kernel vulnerabilities
Message-ID: <4F3964D6.9060209@canonical.com>
Content-Type: text/plain; charset="iso-8859-1"
==========================================================================
Ubuntu Security Notice USN-1363-1
February 13, 2012
linux vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.10
Summary:
Several security issues were fixed in the kernel.
Software Description:
- linux: Linux kernel
Details:
A flaw was found in KVM's Programmable Interval Timer (PIT). When a virtual
interrupt control is not available a local user could use this to cause a
denial of service by starting a timer. (CVE-2011-4622)
A flaw was discovered in the XFS filesystem. If a local user mounts a
specially crafted XFS image it could potential execute arbitrary code on
the system. (CVE-2012-0038)
Andy Whitcroft discovered a that the Overlayfs filesystem was not doing the
extended permission checks needed by cgroups and Linux Security Modules
(LSMs). A local user could exploit this to by-pass security policy and
access files that should not be accessible. (CVE-2012-0055)
A flaw was found in the linux kernels IPv4 IGMP query processing. A remote
attacker could exploit this to cause a denial of service. (CVE-2012-0207)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 11.10:
linux-image-3.0.0-16-generic 3.0.0-16.28
linux-image-3.0.0-16-generic-pae 3.0.0-16.28
linux-image-3.0.0-16-omap 3.0.0-16.28
linux-image-3.0.0-16-powerpc 3.0.0-16.28
linux-image-3.0.0-16-powerpc-smp 3.0.0-16.28
linux-image-3.0.0-16-powerpc64-smp 3.0.0-16.28
linux-image-3.0.0-16-server 3.0.0-16.28
linux-image-3.0.0-16-virtual 3.0.0-16.28
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-1363-1
CVE-2011-4622, CVE-2012-0038, CVE-2012-0055, CVE-2012-0207
Package Information:
https://launchpad.net/ubuntu/+source/linux/3.0.0-16.28
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Message: 2
Date: Mon, 13 Feb 2012 11:49:48 -0800
From: John Johansen <john.johansen@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1364-1] Linux kernel (OMAP4) vulnerabilities
Message-ID: <4F39695C.9040203@canonical.com>
Content-Type: text/plain; charset="iso-8859-1"
==========================================================================
Ubuntu Security Notice USN-1364-1
February 13, 2012
linux-ti-omap4 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.10
Summary:
Several security issues were fixed in the kernel.
Software Description:
- linux-ti-omap4: Linux kernel for OMAP4
Details:
A flaw was discovered in the XFS filesystem. If a local user mounts a
specially crafted XFS image it could potential execute arbitrary code on
the system. (CVE-2012-0038)
Andy Whitcroft discovered a that the Overlayfs filesystem was not doing the
extended permission checks needed by cgroups and Linux Security Modules
(LSMs). A local user could exploit this to by-pass security policy and
access files that should not be accessible. (CVE-2012-0055)
J??ri Aedla discovered that the kernel incorrectly handled /proc/<pid>/mem
permissions. A local attacker could exploit this and gain root privileges.
(CVE-2012-0056)
A flaw was found in the linux kernels IPv4 IGMP query processing. A remote
attacker could exploit this to cause a denial of service. (CVE-2012-0207)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 11.10:
linux-image-3.0.0-1207-omap4 3.0.0-1207.16
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-1364-1
CVE-2012-0038, CVE-2012-0055, CVE-2012-0056, CVE-2012-0207
Package Information:
https://launchpad.net/ubuntu/+source/linux-ti-omap4/3.0.0-1207.16
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