drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Zwei Probleme in Linux
Name: |
Zwei Probleme in Linux |
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ID: |
USN-3580-1 |
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Distribution: |
Ubuntu |
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Plattformen: |
Ubuntu 12.04 ESM |
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Datum: |
Do, 22. Februar 2018, 07:19 |
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Referenzen: |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5715
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5753 |
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Applikationen: |
Linux |
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Originalnachricht |
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========================================================================== Ubuntu Security Notice USN-3580-1 February 22, 2018
linux vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 ESM
Summary:
Several security issues were fixed in the Linux kernel.
Software Description: - linux: Linux kernel
Details:
Jann Horn discovered that microprocessors utilizing speculative execution and branch prediction may allow unauthorized memory reads via sidechannel attacks. This flaw is known as Spectre. A local attacker could use this to expose sensitive information, including kernel memory.
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 12.04 ESM: linux-image-3.2.0-133-generic 3.2.0-133.179 linux-image-3.2.0-133-generic-pae 3.2.0-133.179 linux-image-generic 3.2.0.133.148 linux-image-generic-pae 3.2.0.133.148
Please note that fully mitigating CVE-2017-5715 (Spectre Variant 2) requires corresponding processor microcode/firmware updates or, in virtual environments, hypervisor updates. On i386 and amd64 architectures, the IBRS and IBPB features are required to enable the kernel mitigations. Ubuntu is working with Intel and AMD to provide future microcode updates that implement IBRS and IBPB as they are made available. Ubuntu users with a processor from a different vendor should contact the vendor to identify necessary firmware updates. Ubuntu will provide corresponding QEMU updates in the future for users of self-hosted virtual environments in coordination with upstream QEMU. Ubuntu users in cloud environments should contact the cloud provider to confirm that the hypervisor has been updated to expose the new CPU features to virtual machines.
After a standard system update you need to reboot your computer to apply the necessary changes.
References: https://www.ubuntu.com/usn/usn-3580-1 https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SpectreAndMeltdown CVE-2017-5715, CVE-2017-5753
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