USN-3444-1

Description

linux, linux-aws, linux-gke, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities Jan H. Schönherr discovered that the Xen subsystem did not properly handle block IO merges correctly in some situations. An attacker in a guest vm could use this to cause a denial of service (host crash) or possibly gain administrative privileges in the host. (CVE-2017-12134) Andrey Konovalov discovered that a divide-by-zero error existed in the TCP stack implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-14106) Otto Ebeling discovered that the memory manager in the Linux kernel did not properly check the effective UID in some situations. A local attacker could use this to expose sensitive information. (CVE-2017-14140)

Affected Systems

• ubuntu•linux

  < 4.4.0-97.120

• ubuntu•linux-aws

  < 4.4.0-1038.47

• ubuntu•linux-gke

  < 4.4.0-1032.32

• ubuntu•linux-kvm

  < 4.4.0-1008.13

• ubuntu•linux-raspi2

  < 4.4.0-1075.83

• ubuntu•linux-snapdragon

  < 4.4.0-1077.82

References (4)

• https://ubuntu.com/security/notices/USN-3444-1
• https://ubuntu.com/security/CVE-2017-12134
• https://ubuntu.com/security/CVE-2017-14106
• https://ubuntu.com/security/CVE-2017-14140