CVE-2017-14388: GrootFS doesn’t validate DiffIDs

Severity

High

Vendor

Cloud Foundry Foundation

Affected Cloud Foundry Products and Versions

• GrootFS release
  • 0.3.x versions prior to 0.30.0

Description

GrootFS does not validate DiffIDs, allowing specially crafted images to poison the grootfs volume cache. For example, this could allow an attacker to provide an image layer that GrootFS would consider to be the Ubuntu base layer.

Mitigation

Users of affected versions should apply the following mitigations or upgrades:

• Releases that have fixed this issue include:
  • GrootFS release: 0.30.0

Credit

This issue was responsibly reported by the GrootFS team.

References

• https://github.com/cloudfoundry/grootfs-release/releases

History

2017-10-09: Initial vulnerability report published.