drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Ausführen von Code mit höheren Privilegien in Linux
Name: |
Ausführen von Code mit höheren Privilegien in Linux |
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ID: |
USN-4727-1 |
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Distribution: |
Ubuntu |
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Plattformen: |
Ubuntu 20.04 LTS, Ubuntu 20.10 |
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Datum: |
Mi, 10. Februar 2021, 07:09 |
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Referenzen: |
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26708 |
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Applikationen: |
Linux |
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Originalnachricht |
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========================================================================== Ubuntu Security Notice USN-4727-1 February 10, 2021
linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.8, linux-kvm, linux-oem-5.6, linux-oracle, linux-raspi vulnerability ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.10 - Ubuntu 20.04 LTS
Summary:
The system could be made to crash or run programs as an administrator.
Software Description: - linux: Linux kernel - linux-aws: Linux kernel for Amazon Web Services (AWS) systems - linux-azure: Linux kernel for Microsoft Azure Cloud systems - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-kvm: Linux kernel for cloud environments - linux-oracle: Linux kernel for Oracle Cloud systems - linux-raspi: Linux kernel for Raspberry Pi (V8) systems - linux-hwe-5.8: Linux hardware enablement (HWE) kernel - linux-oem-5.6: Linux kernel for OEM systems
Details:
Alexander Popov discovered that multiple race conditions existed in the AF_VSOCK implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code.
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.10: linux-image-5.8.0-1015-raspi 5.8.0-1015.18 linux-image-5.8.0-1015-raspi-nolpae 5.8.0-1015.18 linux-image-5.8.0-1018-kvm 5.8.0-1018.20 linux-image-5.8.0-1020-oracle 5.8.0-1020.21 linux-image-5.8.0-1022-azure 5.8.0-1022.24 linux-image-5.8.0-1022-gcp 5.8.0-1022.23 linux-image-5.8.0-1023-aws 5.8.0-1023.25 linux-image-5.8.0-43-generic 5.8.0-43.49 linux-image-5.8.0-43-generic-64k 5.8.0-43.49 linux-image-5.8.0-43-generic-lpae 5.8.0-43.49 linux-image-5.8.0-43-lowlatency 5.8.0-43.49 linux-image-aws 5.8.0.1023.25 linux-image-azure 5.8.0.1022.22 linux-image-gcp 5.8.0.1022.22 linux-image-generic 5.8.0.43.48 linux-image-generic-64k 5.8.0.43.48 linux-image-generic-lpae 5.8.0.43.48 linux-image-gke 5.8.0.1022.22 linux-image-kvm 5.8.0.1018.20 linux-image-lowlatency 5.8.0.43.48 linux-image-oracle 5.8.0.1020.19 linux-image-raspi 5.8.0.1015.18 linux-image-raspi-nolpae 5.8.0.1015.18 linux-image-virtual 5.8.0.43.48
Ubuntu 20.04 LTS: linux-image-5.6.0-1047-oem 5.6.0-1047.51 linux-image-5.8.0-43-generic 5.8.0-43.49~20.04.1 linux-image-5.8.0-43-generic-lpae 5.8.0-43.49~20.04.1 linux-image-5.8.0-43-lowlatency 5.8.0-43.49~20.04.1 linux-image-generic-64k-hwe-20.04 5.8.0.43.49~20.04.29 linux-image-generic-hwe-20.04 5.8.0.43.49~20.04.29 linux-image-generic-lpae-hwe-20.04 5.8.0.43.49~20.04.29 linux-image-lowlatency-hwe-20.04 5.8.0.43.49~20.04.29 linux-image-oem-20.04 5.6.0.1047.43 linux-image-virtual-hwe-20.04 5.8.0.43.49~20.04.29
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: https://usn.ubuntu.com/4727-1 CVE-2021-26708
Package Information: https://launchpad.net/ubuntu/+source/linux/5.8.0-43.49 https://launchpad.net/ubuntu/+source/linux-aws/5.8.0-1023.25 https://launchpad.net/ubuntu/+source/linux-azure/5.8.0-1022.24 https://launchpad.net/ubuntu/+source/linux-gcp/5.8.0-1022.23 https://launchpad.net/ubuntu/+source/linux-kvm/5.8.0-1018.20 https://launchpad.net/ubuntu/+source/linux-oracle/5.8.0-1020.21 https://launchpad.net/ubuntu/+source/linux-raspi/5.8.0-1015.18 https://launchpad.net/ubuntu/+source/linux-hwe-5.8/5.8.0-43.49~20.04.1 https://launchpad.net/ubuntu/+source/linux-oem-5.6/5.6.0-1047.51
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