CVE-2023-26054

BuildKit is a toolkit for converting source code to build artifacts in an
efficient, expressive and repeatable manner. In affected versions when the
user sends a build request that contains a Git URL that contains
credentials and the build creates a provenance attestation describing that
build, these credentials could be visible from the provenance attestation.
Git URL can be passed in two ways: 1) Invoking build directly from a URL
with credentials. 2) If the client sends additional version control system
(VCS) info hint parameters on builds from a local source. Usually, that
would mean reading the origin URL from .git/config file. When a build is
performed under specific conditions where credentials were passed to
BuildKit they may be visible to everyone who has access to provenance
attestation. Provenance attestations and VCS info hints were added in
version v0.11.0. Previous versions are not vulnerable. In v0.10, when
building directly from Git URL, the same URL could be visible in
BuildInfo structure that is a predecessor of Provenance attestations.
Previous versions are not vulnerable. This bug has been fixed in v0.11.4.
Users are advised to upgrade. Users unable to upgrade may disable VCS info
hints by setting BUILDX_GIT_INFO=0. buildctl does not set VCS hints
based on .git directory, and values would need to be passed manually with
--opt.

Notes