USN-5017-1

Description

linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-hwe-5.4, linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4 vulnerabilities It was discovered that the virtual file system implementation in the Linux kernel contained an unsigned to signed integer conversion error. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2021-33909) It was discovered that the bluetooth subsystem in the Linux kernel did not properly perform access control. An authenticated attacker could possibly use this to expose sensitive information. (CVE-2020-26558, CVE-2021-0129)

Affected Systems

• ubuntu•linux

  < 5.4.0-80.90

• ubuntu•linux-aws

  < 5.4.0-1054.57

• ubuntu•linux-aws-5.4

  < 5.4.0-1054.57~18.04.1

• ubuntu•linux-azure

  < 5.4.0-1055.57

• ubuntu•linux-azure-5.4

  < 5.4.0-1055.57~18.04.1

• ubuntu•linux-gcp

  < 5.4.0-1049.53

• ubuntu•linux-gcp-5.4

  < 5.4.0-1049.53~18.04.1

• ubuntu•linux-gke

  < 5.4.0-1049.52

• ubuntu•linux-gke-5.4

  < 5.4.0-1049.52~18.04.1

• ubuntu•linux-gkeop

  < 5.4.0-1021.22

• ubuntu•linux-gkeop-5.4

  < 5.4.0-1021.22~18.04.1

• ubuntu•linux-hwe-5.4

  < 5.4.0-80.90~18.04.1

• ubuntu•linux-kvm

  < 5.4.0-1044.46

• ubuntu•linux-oracle

  < 5.4.0-1052.56

• ubuntu•linux-oracle-5.4

  < 5.4.0-1052.56~18.04.1

• ubuntu•linux-raspi

  < 5.4.0-1041.45

• ubuntu•linux-raspi-5.4

  < 5.4.0-1041.45~18.04.1

References (4)

• https://ubuntu.com/security/notices/USN-5017-1
• https://ubuntu.com/security/CVE-2020-26558
• https://ubuntu.com/security/CVE-2021-0129
• https://ubuntu.com/security/CVE-2021-33909