CVE-2023-26054
Credentials inlined to Git URLs could end up in provenance attestation in BuildKit
Em resumo
O BuildKit pode expor acidentalmente credenciais do Git (usuários e senhas) nos registros de construção chamados atestados de proveniência. Isso acontece quando você constrói software a partir de um repositório Git que tem credenciais embutidas na URL, deixando esses segredos visíveis para qualquer pessoa que possa acessar os registros de construção.
Detalhe técnico
Quando o BuildKit v0.11.0+ cria atestados de proveniência para construções iniciadas via URLs Git contendo credenciais embutidas, ou quando dicas de VCS são preenchidas a partir de .git/config, as credenciais permanecem desmascaradas nos metadados do atestado. Um atacante com acesso aos registros de proveniência pode extrair essas credenciais. A vulnerabilidade afeta construções onde as credenciais são passadas diretamente na URL Git ou herdadas da configuração local do repositório; a mitigação inclui atualizar para v0.11.4+ ou desabilitar dicas de VCS via BUILDX_GIT_INFO=0.
Resumo gerado e traduzido por IA a partir da descrição oficial.
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`.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N