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USN-4135-1: Linux kernel vulnerabilities


Severity

High

Vendor

Canonical Ubuntu

Versions Affected
  • Canonical Ubuntu 16.04
Description

Peter Pi discovered a buffer overflow in the virtio network backend (vhost_net) implementation in the Linux kernel. An attacker in a guest may be able to use this to cause a denial of service (host OS crash) or possibly execute arbitrary code in the host OS. (CVE-2019-14835). It was discovered that the Linux kernel on PowerPC architectures did not properly handle Facility Unavailable exceptions in some situations. A local attacker could use this to expose sensitive information. (CVE-2019-15030). It was discovered that the Linux kernel on PowerPC architectures did not properly handle exceptions on interrupts in some situations. A local attacker could use this to expose sensitive information. (CVE-2019-15031). CVEs contained in this USN include: CVE-2019-14835, CVE-2019-15030, CVE-2019-15031

Affected Pivotal Products and Versions

Severity is high 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.

  • Pivotal Application Service
    • 2.6.x versions prior to 2.6.6
    • 2.5.x versions prior to 2.5.11
    • 2.4.x versions prior to 2.4.15
  • PCF Isolation Segment
    • 2.6.x versions prior to 2.6.5
    • 2.5.x versions prior to 2.5.10
    • 2.4.x versions prior to 2.4.14
  • Pivotal Operations Manager
    • 2.6.x versions prior to 2.6.11
    • 2.5.x versions prior to 2.5.19
    • 2.4.x versions prior to 2.4.21
Mitigation

Users of affected products are strongly encouraged to follow one of the mitigations below. The Cloud Foundry security team recommends upgrading BOSH to 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:

  • Pivotal Application Service
    • 2.6.6
    • 2.5.11
    • 2.4.15
  • PCF Isolation Segment
    • 2.6.5
    • 2.5.10
    • 2.4.14
  • Pivotal Operations Manager
    • 2.6.11
    • 2.5.19
    • 2.4.21
References
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