Severity

Low

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 16.04

Description

It was discovered that zlib incorrectly handled pointer arithmetic. An attacker could use this issue to cause zlib to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-9840, CVE-2016-9841)

It was discovered that zlib incorrectly handled vectors involving left shifts of negative integers. An attacker could use this issue to cause zlib to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-9842)

It was discovered that zlib incorrectly handled vectors involving big-endian CRC calculation. An attacker could use this issue to cause zlib to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-9843)

CVEs contained in this USN include: CVE-2016-9840, CVE-2016-9841, CVE-2016-9842, CVE-2016-9843

Affected VMware Products and Versions

Severity is low 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.

• Operations Manager
  • 2.5.x versions prior to 2.5.28
  • 2.6.x versions prior to 2.6.21
  • 2.7.x versions prior to 2.7.11
  • 2.8.x versions prior to 2.8.3
• Pivotal Application Service (PAS)
  • 2.5.x versions prior to 2.5.21
  • 2.6.x versions prior to 2.6.16
  • 2.7.x versions prior to 2.7.10
  • 2.8.x versions prior to 2.8.4
• Pivotal Greenplum for Kubernetes
  • All versions prior to 1.12.0
• Pivotal Isolation Segment
  • 2.6.x versions prior to 2.6.15
  • 2.7.x versions prior to 2.7.10
  • 2.8.x versions prior to 2.8.4

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:

• Operations Manager
  • 2.5.28
  • 2.6.21
  • 2.7.11
  • 2.8.3
• Pivotal Application Service (PAS)
  • 2.5.21
  • 2.6.16
  • 2.7.10
  • 2.8.4
• Pivotal Greenplum for Kubernetes
  • 1.12.0
• Pivotal Isolation Segment
  • 2.6.15
  • 2.7.10
  • 2.8.4

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9840
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9841
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9842
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9843
• https://usn.ubuntu.com/4246-1/
• https://cloudfoundry.org/blog/usn-4246-1

History

2020-01-22: Initial vulnerability report published.