USN-4345-1: Linux kernel vulnerabilities

Severity

High

Vendor

Canonical Ubuntu

Description

Al Viro discovered that the Linux kernel for s390x systems did not properly perform page table upgrades for kernel sections that use secondary address mode. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2020-11884)

It was discovered that the Intel Wi-Fi driver in the Linux kernel did not properly check for errors in some situations. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2019-16234)

Tristan Madani discovered that the block I/O tracing implementation in the Linux kernel contained a race condition. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2019-19768)

It was discovered that the vhost net driver in the Linux kernel contained a stack buffer overflow. A local attacker with the ability to perform ioctl() calls on /dev/vhost-net could use this to cause a denial of service (system crash). (CVE-2020-10942)

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 virtual terminal implementation in the Linux kernel contained a race condition. A local attacker could possibly use this to cause a denial of service (system crash) or expose sensitive information. (CVE-2020-8648)

Jordy Zomer discovered that the floppy driver in the Linux kernel did not properly check for errors in some situations. A local attacker could possibly use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2020-9383)

CVEs contained in this USN include: CVE-2019-16234, CVE-2019-19768, CVE-2020-8648, CVE-2020-9383, CVE-2020-10942, CVE-2020-11608, CVE-2020-11609, CVE-2020-11668, CVE-2020-11884.

Affected Cloud Foundry Products and Versions

Severity is high unless otherwise noted.

• Xenial Stemcells
  • 170.x versions prior to 170.219
  • 250.x versions prior to 250.198
  • 315.x versions prior to 315.183
  • 456.x versions prior to 456.112
  • 621.x versions prior to 621.74
  • All other stemcells not listed.

Mitigation

Users of affected products are strongly encouraged to follow the mitigations below. The Cloud Foundry project recommends upgrading the following releases:

• Xenial Stemcells
  • Upgrade 170.x versions to 170.219 or greater
  • Upgrade 250.x versions to 250.198 or greater
  • Upgrade 315.x versions to 315.183 or greater
  • Upgrade 456.x versions to 456.112 or greater
  • Upgrade 621.x versions to 621.74 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.

History

2020-04-28: Initial vulnerability report published.