Merge ~bromer/usn.ubuntu.com/+git/lsn:lsn into usn.ubuntu.com:master

[Ben Romer]

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+---
+title: "LSN-0073-1: Kernel Live Patch Security Notice"
+permalink: /lsn/0073-1/index.html
+releases: [ubuntu-20.04-lts,ubuntu-18.04-lts]
+date: 2020-10-23 09:23:57
+description: "Several security issues were fixed in the kernel."
+---
+
+## Linux kernel vulnerabilities
+
+A security issue affects these releases of Ubuntu and its derivatives:
+
+* Ubuntu 18.04 LTS
+* Ubuntu 20.04 LTS
+
+### Summary
+
+Several security issues were fixed in the 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-oem -  Linux kernel for OEM 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 kernel livepatch to the following
+versions:
+
+Ubuntu 18.04 LTS
+: aws - 73.1
+: generic - 73.1
+: lowlatency - 73.1
+: oem - 73.1
+
+Ubuntu 20.04 LTS
+: aws - 73.1
+: azure - 73.1
+: gcp - 73.1
+: generic - 73.1
+: lowlatency - 73.1
+
+## Support Information
+
+Kernels older than the levels listed below do not receive livepatch 
+updates. If you are running a kernel version earlier than the one listed
+below, please upgrade your kernel as soon as possible.
+
+Ubuntu 18.04 LTS
+: linux-aws - 4.15.0-1054
+: linux-azure - 5.0.0-1025
+: linux-gcp - 5.0.0-1025
+: linux-oem - 4.15.0-1063
+: linux - 4.15.0-69
+
+Ubuntu 20.04 LTS
+: linux-aws - 5.4.0-1009
+: linux-azure - 5.4.0-1010
+: linux-gcp - 5.4.0-1009
+: linux-oem - 5.4.0-26
+: linux - 5.4.0-26
+
+Ubuntu 16.04 LTS
+: linux-aws - 4.4.0-1098
+: linux-azure - 4.15.0-1063
+: linux-hwe - 4.15.0-69
+: linux - 4.4.0-168
+
+Ubuntu 14.04 ESM
+: linux-lts-xenial - 4.4.0-168
+
+## References
+
+* [CVE-2020-12351](https://people.canonical.com/~ubuntu-security/cve/CVE-2020-12351)
+* [CVE-2020-12352](https://people.canonical.com/~ubuntu-security/cve/CVE-2020-12352)
+* [CVE-2020-24490](https://people.canonical.com/~ubuntu-security/cve/CVE-2020-24490)