Severity
High
Vendor
Linux kernel
Versions Affected
- Ubuntu 14.04
Description
Nathan Williams discovered that overlayfs in the Linux kernel incorrectly handled setattr operations. A local unprivileged attacker could use this to create files with administrative permission attributes and execute arbitrary code with elevated privileges.
The Cloud Foundry project released a BOSH stemcell version 3146.2 and 3173 that has the patched version of the Linux kernel.
Affected Products and Versions
Severity is high unless otherwise noted.
- All versions of Cloud Foundry BOSH stemcells prior to 3173 are vulnerable, besides patched versions of 3146.x at least at version 3146.2.
Mitigation
Users of affected versions should apply the following mitigation:
- The Cloud Foundry project recommends that Cloud Foundry deployments run with BOSH stemcells 3173 or later versions, or patched 3146.x versions at 3146.2 or later.
Credit
Nathan Williams
