drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Zwei Probleme in Linux
Name: |
Zwei Probleme in Linux |
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ID: |
USN-3836-1 |
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Distribution: |
Ubuntu |
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Plattformen: |
Ubuntu 18.04 LTS |
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Datum: |
Mo, 3. Dezember 2018, 22:29 |
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Referenzen: |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6559
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18955 |
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Applikationen: |
Linux |
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Originalnachricht |
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========================================================================== Ubuntu Security Notice USN-3836-1 December 03, 2018
linux, linux-gcp, linux-kvm, linux-raspi2 vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description: - linux: Linux kernel - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-kvm: Linux kernel for cloud environments - linux-raspi2: Linux kernel for Raspberry Pi 2
Details:
Jann Horn discovered that the Linux kernel mishandles mapping UID or GID ranges inside nested user namespaces in some situations. A local attacker could use this to bypass access controls on resources outside the namespace. (CVE-2018-18955)
Philipp Wendler discovered that the overlayfs implementation in the Linux kernel did not properly verify the directory contents permissions from within a unprivileged user namespace. A local attacker could use this to expose sensitive information (protected file names). (CVE-2018-6559)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 18.04 LTS: linux-image-4.15.0-1025-gcp 4.15.0-1025.26 linux-image-4.15.0-1027-kvm 4.15.0-1027.27 linux-image-4.15.0-1029-raspi2 4.15.0-1029.31 linux-image-4.15.0-42-generic 4.15.0-42.45 linux-image-4.15.0-42-generic-lpae 4.15.0-42.45 linux-image-4.15.0-42-lowlatency 4.15.0-42.45 linux-image-4.15.0-42-snapdragon 4.15.0-42.45 linux-image-gcp 4.15.0.1025.27 linux-image-generic 4.15.0.42.44 linux-image-generic-lpae 4.15.0.42.44 linux-image-gke 4.15.0.1025.27 linux-image-kvm 4.15.0.1027.27 linux-image-lowlatency 4.15.0.42.44 linux-image-raspi2 4.15.0.1029.27 linux-image-snapdragon 4.15.0.42.44
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/usn/usn-3836-1 CVE-2018-18955, CVE-2018-6559
Package Information: https://launchpad.net/ubuntu/+source/linux/4.15.0-42.45 https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1025.26 https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1027.27 https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1029.31
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