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💡 Newskategorie: Unix Server
🔗 Quelle: usn.ubuntu.com
linux, linux-raspi2, linux-raspi2-5.3 regression
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 19.10
- Ubuntu 18.04 LTS
Summary
USN-4369-1 introduced a regression in the Linux kernel.
Software Description
- linux - Linux kernel
- linux-raspi2 - Linux kernel for Raspberry Pi (V7) systems
- linux-raspi2-5.3 - Linux kernel for Raspberry Pi (V7) systems
Details
USN-4369-1 fixed vulnerabilities in the 5.3 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)
Tristan Madani discovered that the file locking implementation in the Linux kernel contained a race condition. A local attacker could possibly use this to cause a denial of service or expose sensitive information. (CVE-2019-19769)
It was discovered that the Serial CAN interface driver in the Linux kernel did not properly initialize data. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-11494)
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 OV51x USB Camera device driver in the Linux kernel did not properly validate device metadata. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2020-11608)
It was discovered that the STV06XX USB Camera device driver in the Linux kernel did not properly validate device metadata. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2020-11609)
It was discovered that the Xirlink C-It USB Camera device driver in the Linux kernel did not properly validate device metadata. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2020-11668)
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 19.10
- linux-image-5.3.0-1026-raspi2 - 5.3.0-1026.28
- linux-image-5.3.0-55-generic - 5.3.0-55.49
- linux-image-5.3.0-55-generic-lpae - 5.3.0-55.49
- linux-image-5.3.0-55-lowlatency - 5.3.0-55.49
- linux-image-5.3.0-55-snapdragon - 5.3.0-55.49
- linux-image-generic - 5.3.0.55.47
- linux-image-generic-lpae - 5.3.0.55.47
- linux-image-lowlatency - 5.3.0.55.47
- linux-image-raspi2 - 5.3.0.1026.23
- linux-image-snapdragon - 5.3.0.55.47
- linux-image-virtual - 5.3.0.55.47
- Ubuntu 18.04 LTS
- linux-image-5.3.0-1026-raspi2 - 5.3.0-1026.28~18.04.1
- linux-image-raspi2-hwe-18.04 - 5.3.0.1026.15
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
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.