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USN-3855-1: systemd vulnerabilities


Severity

High

Vendor

Canonical Ubuntu

Versions Affected
  • Canonical Ubuntu 16.04
  • Canonical Ubuntu 18.04
Description

It was discovered that systemd-journald allocated variable-length buffers for certain message fields on the stack. A local attacker could potentially exploit this to cause a denial of service, or execute arbitrary code. (CVE-2018-16864)

It was discovered that systemd-journald allocated variable-length arrays of objects representing message fields on the stack. A local attacker could potentially exploit this to cause a denial of service, or execute arbitrary code. (CVE-2018-16865)

An out-of-bounds read was discovered in systemd-journald. A local attacker could potentially exploit this to obtain sensitive information and bypass ASLR protections. (CVE-2018-16866)

CVEs contained in this USN include: CVE-2018-16864, CVE-2018-16865, CVE-2018-16866

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 includes vulnerable stemcells and container rootfs in the following releases:
    • 2.4.x versions prior to 2.4.3
    • 2.3.x versions prior to 2.3.7
  • PCF Isolation Segment includes vulnerable stemcells and container rootfs in the following releases:
    • 2.4.x versions prior to 2.4.3
    • 2.3.x versions prior to 2.3.7
  • Pivotal Operations Manager is vulnerable in the following releases:
    • 2.4.x versions prior to 2.4.3
    • 2.3.x versions prior to 2.3.8
Mitigation

Users of affected versions should apply the following mitigation:

  • 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: 2.5.0, 2.4.3, 2.3.7
    • PCF Isolation Segment: 2.5.0, 2.4.3, 2.3.7
    • Pivotal Operations Manager: 2.5.0, 2.4.3, 2.3.8
References
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