Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 14.04

Description

It was discovered that libarchive incorrectly handled hardlink entries when extracting archives. A remote attacker could possibly use this issue to overwrite arbitrary files. (CVE-2016-5418)

Christian Wressnegger, Alwin Maier, and Fabian Yamaguchi discovered that libarchive incorrectly handled filename lengths when writing ISO9660 archives. A remote attacker could use this issue to cause libarchive to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-6250)

Alexander Cherepanov discovered that libarchive incorrectly handled recursive decompressions. A remote attacker could possibly use this issue to cause libarchive to hang, resulting in a denial of service. (CVE-2016-7166)

It was discovered that libarchive incorrectly handled non-printable multibyte characters in filenames. A remote attacker could possibly use this issue to cause libarchive to crash, resulting in a denial of service. (CVE-2016-8687)

It was discovered that libarchive incorrectly handled line sizes when extracting certain archives. A remote attacker could possibly use this issue to cause libarchive to crash, resulting in a denial of service. (CVE-2016-8688)

It was discovered that libarchive incorrectly handled multiple EmptyStream attributes when extracting certain 7zip archives. A remote attacker could possibly use this issue to cause libarchive to crash, resulting in a denial of service. (CVE-2016-8689)

Jakub Jirasek discovered that libarchive incorrectly handled memory when extracting certain archives. A remote attacker could possibly use this issue to cause libarchive to crash, resulting in a denial of service. (CVE-2017-5601)

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• Cloud Foundry BOSH stemcells are vulnerable, including:
  • 3151.x versions prior to 3151.14
  • 3233.x versions prior to 3233.16
  • 3263.x versions prior to 3263.22
  • 3312.x versions prior to 3312.22
  • 3363.x versions prior to 3363.14
  • All other stemcells not listed.
• All versions of Cloud Foundry cflinuxfs2 prior to 1.108.0

Mitigation

OSS users are strongly encouraged to follow one of the mitigations below:

• The Cloud Foundry project recommends upgrading the following BOSH stemcells:
  • Upgrade 3151.x versions to 3151.14 or later
  • Upgrade 3233.x versions to 3233.16 or later
  • Upgrade 3263.x versions to 3263.22 or later
  • Upgrade 3312.x versions to 3312.22 or later
  • Upgrade 3363.x versions to 3363.14 or later
  • All other stemcells should be upgraded to the latest version.
• The Cloud Foundry project recommends that Cloud Foundry deployments run with cflinuxfs2 versions 1.108.0 or later.

References

• USN-3225-1
• CVE-2016-5418
• CVE-2016-6250
• CVE-2016-7166
• CVE-2016-8687
• CVE-2016-8688
• CVE-2016-8689
• CVE-2017-5601