drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Mehrere Probleme in Linux
Name: |
Mehrere Probleme in Linux |
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ID: |
USN-2851-1 |
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Distribution: |
Ubuntu |
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Plattformen: |
Ubuntu 15.10 |
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Datum: |
So, 20. Dezember 2015, 16:38 |
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Referenzen: |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8551
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8550
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8552 |
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Applikationen: |
Linux |
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Originalnachricht |
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========================================================================== Ubuntu Security Notice USN-2851-1 December 19, 2015
linux vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 15.10
Summary:
Several security issues were fixed in the kernel.
Software Description: - linux: Linux kernel
Details:
Felix Wilhelm discovered a race condition in the Xen paravirtualized drivers which can cause double fetch vulnerabilities. An attacker in the paravirtualized guest could exploit this flaw to cause a denial of service (crash the host) or potentially execute arbitrary code on the host. (CVE-2015-8550)
Konrad Rzeszutek Wilk discovered the Xen PCI backend driver does not perform sanity checks on the device's state. An attacker could exploit this flaw to cause a denial of service (NULL dereference) on the host. (CVE-2015-8551)
Konrad Rzeszutek Wilk discovered the Xen PCI backend driver does not perform sanity checks on the device's state. An attacker could exploit this flaw to cause a denial of service by flooding the logging system with WARN() messages causing the initial domain to exhaust disk space. (CVE-2015-8552)
Jann Horn discovered a ptrace issue with user namespaces in the Linux kernel. The namespace owner could potentially exploit this flaw by ptracing a root owned process entering the user namespace to elevate its privileges and potentially gain access outside of the namespace. (http://bugs.launchpad.net/bugs/1527374)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 15.10: linux-image-4.2.0-22-generic 4.2.0-22.27 linux-image-4.2.0-22-generic-lpae 4.2.0-22.27 linux-image-4.2.0-22-lowlatency 4.2.0-22.27 linux-image-4.2.0-22-powerpc-e500mc 4.2.0-22.27 linux-image-4.2.0-22-powerpc-smp 4.2.0-22.27 linux-image-4.2.0-22-powerpc64-emb 4.2.0-22.27 linux-image-4.2.0-22-powerpc64-smp 4.2.0-22.27
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. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well.
References: http://www.ubuntu.com/usn/usn-2851-1 CVE-2015-8550, CVE-2015-8551, CVE-2015-8552, 1527374
Package Information: https://launchpad.net/ubuntu/+source/linux/4.2.0-22.27
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