https://usn.ubuntu.com/4592-1/

USN-4592-1: Linux kernel vulnerabilities

linux-oem-osp1, linux-raspi2-5.3 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-oem-osp1 - Linux kernel for OEM systems
linux-raspi2-5.3 - Linux kernel for Raspberry Pi (V8) systems
Details
Andy Nguyen discovered that the Bluetooth L2CAP implementation in the Linux kernel contained a type-confusion error. A physically proximate remote attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-12351)
Andy Nguyen discovered that the Bluetooth A2MP implementation in the Linux kernel did not properly initialize memory in some situations. A physically proximate remote attacker could use this to expose sensitive information (kernel memory). (CVE-2020-12352)
Andy Nguyen discovered that the Bluetooth HCI event packet parser in the Linux kernel did not properly handle event advertisements of certain sizes, leading to a heap-based buffer overflow. A physically proximate remote attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-24490)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 18.04 LTS
linux-image-5.0.0-1070-oem-osp1 - 5.0.0-1070.76
linux-image-5.3.0-1036-raspi2 - 5.3.0-1036.38
linux-image-oem-osp1 - 5.0.0.1070.68
linux-image-raspi2-hwe-18.04 - 5.3.0.1036.25
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.
References
CVE-2020-12351
CVE-2020-12352
CVE-2020-24490
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Ubuntu是一个以桌面应用为主的Linux操作系统

CVE-2020-24490

CVE-2020-12352

CVE-2020-12351

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