drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Mehrere Probleme in Linux
Name: |
Mehrere Probleme in Linux |
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ID: |
USN-1363-1 |
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Distribution: |
Ubuntu |
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Plattformen: |
Ubuntu 11.10 |
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Datum: |
Di, 14. Februar 2012, 08:55 |
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Referenzen: |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4622
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0038
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0055
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0207 |
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Applikationen: |
Linux |
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Originalnachricht |
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========================================================================== 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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