drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Mehrere Probleme in Linux
Name: |
Mehrere Probleme in Linux |
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ID: |
USN-2420-1 |
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Distribution: |
Ubuntu |
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Plattformen: |
Ubuntu 14.04 LTS |
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Datum: |
Di, 25. November 2014, 08:24 |
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Referenzen: |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3690
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4608
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-7970
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-7975 |
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Applikationen: |
Linux |
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Originalnachricht |
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========================================================================== Ubuntu Security Notice USN-2420-1 November 25, 2014
linux vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 14.04 LTS
Summary:
Several security issues were fixed in the kernel.
Software Description: - linux: Linux kernel
Details:
A flaw was discovered in how the Linux kernel's KVM (Kernel Virtual Machine) subsystem handles the CR4 control register at VM entry on Intel processors. A local host OS user can exploit this to cause a denial of service (kill arbitrary processes, or system disruption) by leveraging /dev/kvm access. (CVE-2014-3690)
Don Bailey discovered a flaw in the LZO decompress algorithm used by the Linux kernel. An attacker could exploit this flaw to cause a denial of service (memory corruption or OOPS). (CVE-2014-4608)
Andy Lutomirski discovered a flaw in how the Linux kernel handles pivot_root when used with a chroot directory. A local user could exploit this flaw to cause a denial of service (mount-tree loop). (CVE-2014-7970)
Andy Lutomirski discovered that the Linux kernel was not checking the CAP_SYS_ADMIN when remounting filesystems to read-only. A local user could exploit this flaw to cause a denial of service (loss of writability). (CVE-2014-7975)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 14.04 LTS: linux-image-3.13.0-40-generic 3.13.0-40.69 linux-image-3.13.0-40-generic-lpae 3.13.0-40.69 linux-image-3.13.0-40-lowlatency 3.13.0-40.69 linux-image-3.13.0-40-powerpc-e500 3.13.0-40.69 linux-image-3.13.0-40-powerpc-e500mc 3.13.0-40.69 linux-image-3.13.0-40-powerpc-smp 3.13.0-40.69 linux-image-3.13.0-40-powerpc64-emb 3.13.0-40.69 linux-image-3.13.0-40-powerpc64-smp 3.13.0-40.69
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-2420-1 CVE-2014-3690, CVE-2014-4608, CVE-2014-7970, CVE-2014-7975
Package Information: https://launchpad.net/ubuntu/+source/linux/3.13.0-40.69
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