All Vulnerability Reports

USN-4302-1: Linux kernel vulnerabilities

Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 16.04

Description

Paulo Bonzini discovered that the KVM hypervisor implementation in the Linux kernel could improperly let a nested (level 2) guest access the resources of a parent (level 1) guest in certain situations. An attacker could use this to expose sensitive information. (CVE-2020-2732)

Gregory Herrero discovered that the fix for CVE-2019-14615 to address the Linux kernel not properly clearing data structures on context switches for certain Intel graphics processors was incomplete. A local attacker could use this to expose sensitive information. (CVE-2020-8832)

It was discovered that the IPMI message handler implementation in the Linux kernel did not properly deallocate memory in certain situations. A local attacker could use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19046)

It was discovered that the Intel WiMAX 2400 driver in the Linux kernel did not properly deallocate memory in certain situations. A local attacker could use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19051)

It was discovered that the Marvell Wi-Fi device driver in the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could use this to possibly cause a denial of service (kernel memory exhaustion). (CVE-2019-19056)

It was discovered that the Intel Wi-Fi device driver in the Linux kernel device driver in the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could possibly use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19058)

It was discovered that the Brocade BFA Fibre Channel device driver in the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could possibly use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19066)

It was discovered that the Realtek RTL8xxx USB Wi-Fi device driver in the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could possibly use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19068)

It was discovered that ZR364XX Camera USB device driver for the Linux kernel did not properly initialize memory. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2019-15217)

CVEs contained in this USN include: CVE-2019-15217, CVE-2019-19051, CVE-2019-19056, CVE-2019-19066, CVE-2019-19068, CVE-2019-19058, CVE-2020-2732, CVE-2019-19046, CVE-2020-8832

Affected VMware Products and Versions

Severity is medium unless otherwise noted.

Vulnerable Cloud Foundry components individually listed here.

Impacted stemcells may be updated independently of upgrading Pivotal Application Service or PCF Isolation Segment.

• Isolation Segment
  • 2.6.x versions prior to 2.6.18
  • 2.7.x versions prior to 2.7.13
  • 2.8.x versions prior to 2.8.7
  • 2.9.x versions prior to 2.9.1

• Operations Manager
  • 2.6.x versions prior to 2.6.25
  • 2.7.x versions prior to 2.7.15
  • 2.8.x versions prior to 2.8.6

• VMware Tanzu Application Service for VMs
  • 2.6.x versions prior to 2.6.19
  • 2.7.x versions prior to 2.7.13
  • 2.8.x versions prior to 2.8.7
  • 2.9.x versions prior to 2.9.1

Mitigation

Users of affected products are strongly encouraged to follow the mitigation below. The Cloud Foundry security team recommends upgrading the affected OSS components listed here if applicable. Upgrade Pivotal products that use earlier versions of CF components to new Pivotal releases using new versions linked above. On the Pivotal Network product page for each release, check the Depends On section and/or Release Notes for this information. Releases that have fixed this issue include:

• Isolation Segment
  • 2.6.18
  • 2.7.13
  • 2.8.7
  • 2.9.1

• Operations Manager
  • 2.6.25
  • 2.7.15
  • 2.8.6

• VMware Tanzu Application Service for VMs
  • 2.6.19
  • 2.7.13
  • 2.8.7
  • 2.9.1

References

• https://people.canonical.com/~ubuntu-security/cve/CVE-2019-15217
• https://people.canonical.com/~ubuntu-security/cve/CVE-2019-19051
• https://people.canonical.com/~ubuntu-security/cve/CVE-2019-19056
• https://people.canonical.com/~ubuntu-security/cve/CVE-2019-19066
• https://people.canonical.com/~ubuntu-security/cve/CVE-2019-19068
• https://people.canonical.com/~ubuntu-security/cve/CVE-2019-19058
• https://people.canonical.com/~ubuntu-security/cve/CVE-2020-2732
• https://people.canonical.com/~ubuntu-security/cve/CVE-2019-19046
• https://people.canonical.com/~ubuntu-security/cve/CVE-2020-8832
• https://usn.ubuntu.com/4302-1/
• https://cloudfoundry.org/blog/usn-4302-1

History

2020-04-23: Initial vulnerability report published.