drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Mehrere Probleme in Linux (Aktualisierung)
Name: |
Mehrere Probleme in Linux (Aktualisierung) |
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ID: |
USN-4367-2 |
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Distribution: |
Ubuntu |
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Plattformen: |
Ubuntu 20.04 LTS |
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Datum: |
Fr, 29. Mai 2020, 07:23 |
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Referenzen: |
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19377
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-11565
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12657 |
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Applikationen: |
Linux |
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Update von: |
Mehrere Probleme in Linux |
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Originalnachricht |
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========================================================================== Ubuntu Security Notice USN-4367-2 May 28, 2020
linux regression ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.04 LTS
Summary:
USN-4367-1 introduced a regression in the Linux kernel.
Software Description: - linux: Linux kernel
Details:
USN-4367-1 fixed vulnerabilities in the 5.4 Linux kernel. Unfortunately, that update introduced a regression in overlayfs. This update corrects the problem.
We apologize for the inconvenience.
Original advisory details:
It was discovered that the btrfs implementation in the Linux kernel did not properly detect that a block was marked dirty in some situations. An attacker could use this to specially craft a file system image that, when unmounted, could cause a denial of service (system crash). (CVE-2019-19377)
It was discovered that the linux kernel did not properly validate certain mount options to the tmpfs virtual memory file system. A local attacker with the ability to specify mount options could use this to cause a denial of service (system crash). (CVE-2020-11565)
It was discovered that the block layer in the Linux kernel contained a race condition leading to a use-after-free vulnerability. A local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2020-12657)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.04 LTS: linux-image-5.4.0-33-generic 5.4.0-33.37 linux-image-5.4.0-33-generic-lpae 5.4.0-33.37 linux-image-5.4.0-33-lowlatency 5.4.0-33.37 linux-image-generic 5.4.0.33.38 linux-image-generic-lpae 5.4.0.33.38 linux-image-lowlatency 5.4.0.33.38 linux-image-oem 5.4.0.33.38 linux-image-oem-osp1 5.4.0.33.38 linux-image-virtual 5.4.0.33.38
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/4367-2 https://usn.ubuntu.com/4367-1 https://launchpad.net/bugs/1879690
Package Information: https://launchpad.net/ubuntu/+source/linux/5.4.0-33.37
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