BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Two malicious build steps running in parallel sharing the same cache mounts with subpaths could cause a race condition that can lead to files from the host system being accessible to the build container. The issue has been fixed in v0.12.5. Workarounds include, avoiding using BuildKit frontend from an untrusted source or building an untrusted Dockerfile containing cache mounts with –mount=type=cache,source=… options.
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Buildkit | Mobyproject | * | 0.12.5 (excluding) |
| Docker.io | Ubuntu | bionic | * |
| Docker.io | Ubuntu | devel | * |
| Docker.io | Ubuntu | esm-apps/bionic | * |
| Docker.io | Ubuntu | esm-apps/focal | * |
| Docker.io | Ubuntu | esm-apps/jammy | * |
| Docker.io | Ubuntu | esm-apps/noble | * |
| Docker.io | Ubuntu | focal | * |
| Docker.io | Ubuntu | jammy | * |
| Docker.io | Ubuntu | mantic | * |
| Docker.io | Ubuntu | noble | * |
| Docker.io | Ubuntu | oracular | * |
| Docker.io | Ubuntu | plucky | * |
| Docker.io | Ubuntu | trusty | * |
| Docker.io | Ubuntu | xenial | * |
| Docker.io-app | Ubuntu | devel | * |
| Docker.io-app | Ubuntu | esm-apps/focal | * |
| Docker.io-app | Ubuntu | esm-apps/jammy | * |
| Docker.io-app | Ubuntu | esm-apps/noble | * |
| Docker.io-app | Ubuntu | focal | * |
| Docker.io-app | Ubuntu | jammy | * |
| Docker.io-app | Ubuntu | mantic | * |
| Docker.io-app | Ubuntu | noble | * |
| Docker.io-app | Ubuntu | oracular | * |
| Docker.io-app | Ubuntu | plucky | * |
| Docker.io-app | Ubuntu | trusty | * |
A race condition occurs within concurrent environments, and it is effectively a property of a code sequence. Depending on the context, a code sequence may be in the form of a function call, a small number of instructions, a series of program invocations, etc. A race condition violates these properties, which are closely related:
A race condition exists when an “interfering code sequence” can still access the shared resource, violating exclusivity. The interfering code sequence could be “trusted” or “untrusted.” A trusted interfering code sequence occurs within the product; it cannot be modified by the attacker, and it can only be invoked indirectly. An untrusted interfering code sequence can be authored directly by the attacker, and typically it is external to the vulnerable product.