drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Mehrere Probleme in Linux
Name: |
Mehrere Probleme in Linux |
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ID: |
USN-4950-1 |
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Distribution: |
Ubuntu |
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Plattformen: |
Ubuntu 21.04 |
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Datum: |
Mi, 12. Mai 2021, 07:29 |
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Referenzen: |
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3489
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3491
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3490 |
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Applikationen: |
Linux |
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Originalnachricht |
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========================================================================== Ubuntu Security Notice USN-4950-1 May 11, 2021
linux, linux-aws, linux-azure, linux-gcp, linux-kvm, linux-oracle, linux-raspi vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 21.04
Summary:
Several security issues were fixed in the Linux kernel.
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
Details:
Ryota Shiga discovered that the eBPF implementation in the Linux kernel did not properly verify that a BPF program only reserved as much memory for a ring buffer as was allocated. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2021-3489)
Manfred Paul discovered that the eBPF implementation in the Linux kernel did not properly track bounds on bitwise operations. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2021-3490)
Billy Jheng Bing-Jhong discovered that the io_uring implementation of the Linux kernel did not properly enforce the MAX_RW_COUNT limit in some situations. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2021-3491)
Norbert Slusarek discovered that the CAN ISOTP protocol implementation in the Linux kernel contained a race condition. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Please note that to address this issue, SF_BROADCAST support was removed temporarily from the CAN ISOTP implementation in Ubuntu 21.04 kernels. (LP: #1927409)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 21.04: linux-image-5.11.0-1005-azure 5.11.0-1005.5 linux-image-5.11.0-1006-oracle 5.11.0-1006.6 linux-image-5.11.0-1007-aws 5.11.0-1007.7 linux-image-5.11.0-1007-gcp 5.11.0-1007.7 linux-image-5.11.0-1007-kvm 5.11.0-1007.7 linux-image-5.11.0-1008-raspi 5.11.0-1008.8 linux-image-5.11.0-1008-raspi-nolpae 5.11.0-1008.8 linux-image-5.11.0-17-generic 5.11.0-17.18 linux-image-5.11.0-17-generic-64k 5.11.0-17.18 linux-image-5.11.0-17-generic-lpae 5.11.0-17.18 linux-image-5.11.0-17-lowlatency 5.11.0-17.18 linux-image-aws 5.11.0.1007.7 linux-image-azure 5.11.0.1005.5 linux-image-gcp 5.11.0.1007.7 linux-image-generic 5.11.0.17.18 linux-image-generic-64k 5.11.0.17.18 linux-image-generic-lpae 5.11.0.17.18 linux-image-gke 5.11.0.1007.7 linux-image-kvm 5.11.0.1007.7 linux-image-lowlatency 5.11.0.17.18 linux-image-oracle 5.11.0.1006.6 linux-image-raspi 5.11.0.1008.6 linux-image-raspi-nolpae 5.11.0.1008.6 linux-image-virtual 5.11.0.17.18
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://ubuntu.com/security/notices/USN-4950-1 CVE-2021-3489, CVE-2021-3490, CVE-2021-3491, https://launchpad.net/bugs/1927409
Package Information: https://launchpad.net/ubuntu/+source/linux/5.11.0-17.18 https://launchpad.net/ubuntu/+source/linux-aws/5.11.0-1007.7 https://launchpad.net/ubuntu/+source/linux-azure/5.11.0-1005.5 https://launchpad.net/ubuntu/+source/linux-gcp/5.11.0-1007.7 https://launchpad.net/ubuntu/+source/linux-kvm/5.11.0-1007.7 https://launchpad.net/ubuntu/+source/linux-oracle/5.11.0-1006.6 https://launchpad.net/ubuntu/+source/linux-raspi/5.11.0-1008.8
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