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Today's Topics:
1. [USN-1421-1] Linux kernel (Maverick backport) vulnerabilities
(John Johansen)
2. [USN-1422-1] Linux kernel vulnerabilities (John Johansen)
3. [USN-1423-1] Samba vulnerability (Tyler Hicks)
----------------------------------------------------------------------
Message: 1
Date: Thu, 12 Apr 2012 11:34:32 -0700
From: John Johansen <john.johansen@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1421-1] Linux kernel (Maverick backport) vulnerabilities
Message-ID: <4F872038.2060709@canonical.com>
Content-Type: text/plain; charset="iso-8859-1"
==========================================================================
Ubuntu Security Notice USN-1421-1
April 12, 2012
linux-lts-backport-maverick vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 10.04 LTS
Summary:
Several security issues were fixed in the kernel.
Software Description:
- linux-lts-backport-maverick: Linux kernel backport from Maverick
Details:
Sasha Levin discovered a flaw in the permission checking for device
assignments requested via the kvm ioctl in the Linux kernel. A local user
could use this flaw to crash the system causing a denial of service.
(CVE-2011-4347)
Stephan B??rwolf discovered a flaw in the KVM (kernel-based virtual
machine) subsystem of the Linux kernel. A local unprivileged user can crash
use this flaw to crash VMs causing a deny of service. (CVE-2012-0045)
H. Peter Anvin reported a flaw in the Linux kernel that could crash the
system. A local user could exploit this flaw to crash the system.
(CVE-2012-1097)
A flaw was discovered in the Linux kernel's cgroups subset. A local
attacker could use this flaw to crash the system. (CVE-2012-1146)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 10.04 LTS:
linux-image-2.6.35-32-generic 2.6.35-32.68~lucid1
linux-image-2.6.35-32-generic-pae 2.6.35-32.68~lucid1
linux-image-2.6.35-32-server 2.6.35-32.68~lucid1
linux-image-2.6.35-32-virtual 2.6.35-32.68~lucid1
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1421-1
CVE-2011-4347, CVE-2012-0045, CVE-2012-1097, CVE-2012-1146
Package Information:
https://launchpad.net/ubuntu/+source/linux-lts-backport-maverick/2.6.35-32.68~lucid1
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Message: 2
Date: Thu, 12 Apr 2012 12:12:41 -0700
From: John Johansen <john.johansen@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1422-1] Linux kernel vulnerabilities
Message-ID: <4F872929.2020007@canonical.com>
Content-Type: text/plain; charset="iso-8859-1"
==========================================================================
Ubuntu Security Notice USN-1422-1
April 12, 2012
linux vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.04
Summary:
Several security issues were fixed in the kernel.
Software Description:
- linux: Linux kernel
Details:
Sasha Levin discovered a flaw in the permission checking for device
assignments requested via the kvm ioctl in the Linux kernel. A local user
could use this flaw to crash the system causing a denial of service.
(CVE-2011-4347)
Stephan B??rwolf discovered a flaw in the KVM (kernel-based virtual
machine) subsystem of the Linux kernel. A local unprivileged user can crash
use this flaw to crash VMs causing a deny of service. (CVE-2012-0045)
H. Peter Anvin reported a flaw in the Linux kernel that could crash the
system. A local user could exploit this flaw to crash the system.
(CVE-2012-1097)
A flaw was discovered in the Linux kernel's cgroups subset. A local
attacker could use this flaw to crash the system. (CVE-2012-1146)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 11.04:
linux-image-2.6.38-14-generic 2.6.38-14.58
linux-image-2.6.38-14-generic-pae 2.6.38-14.58
linux-image-2.6.38-14-omap 2.6.38-14.58
linux-image-2.6.38-14-powerpc 2.6.38-14.58
linux-image-2.6.38-14-powerpc-smp 2.6.38-14.58
linux-image-2.6.38-14-powerpc64-smp 2.6.38-14.58
linux-image-2.6.38-14-server 2.6.38-14.58
linux-image-2.6.38-14-versatile 2.6.38-14.58
linux-image-2.6.38-14-virtual 2.6.38-14.58
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-1422-1
CVE-2011-4347, CVE-2012-0045, CVE-2012-1097, CVE-2012-1146
Package Information:
https://launchpad.net/ubuntu/+source/linux/2.6.38-14.58
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Message: 3
Date: Thu, 12 Apr 2012 19:28:47 -0500
From: Tyler Hicks <tyhicks@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1423-1] Samba vulnerability
Message-ID: <20120413002846.GA11912@boyd>
Content-Type: text/plain; charset="us-ascii"
==========================================================================
Ubuntu Security Notice USN-1423-1
April 13, 2012
samba vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS
Summary:
Samba could be made to run programs as the administrator if it received
specially crafted network traffic.
Software Description:
- samba: SMB/CIFS file, print, and login server for Unix
Details:
Brian Gorenc discovered that Samba incorrectly calculated array bounds when
handling remote procedure calls (RPC) over the network. A remote,
unauthenticated attacker could exploit this to execute arbitrary code as the
root user. (CVE-2012-1182)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 11.10:
samba 2:3.5.11~dfsg-1ubuntu2.2
Ubuntu 11.04:
samba 2:3.5.8~dfsg-1ubuntu2.4
Ubuntu 10.04 LTS:
samba 2:3.4.7~dfsg-1ubuntu3.9
Ubuntu 8.04 LTS:
samba 3.0.28a-1ubuntu4.18
In general, a standard system update will make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1423-1
CVE-2012-1182
Package Information:
https://launchpad.net/ubuntu/+source/samba/2:3.5.11~dfsg-1ubuntu2.2
https://launchpad.net/ubuntu/+source/samba/2:3.5.8~dfsg-1ubuntu2.4
https://launchpad.net/ubuntu/+source/samba/2:3.4.7~dfsg-1ubuntu3.9
https://launchpad.net/ubuntu/+source/samba/3.0.28a-1ubuntu4.18
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