x/vulndb: potential Go vuln in github.com/open-policy-agent/opa: CVE-2022-36085

[GoVulnBot]

CVE-2022-36085 references github.com/open-policy-agent/opa, which may be a Go module.

Description:
Open Policy Agent (OPA) is an open source, general-purpose policy engine. The Rego compiler provides a (deprecated) WithUnsafeBuiltins function, which allows users to provide a set of built-in functions that should be deemed unsafe — and as such rejected — by the compiler if encountered in the policy compilation stage. A bypass of this protection has been found, where the use of the with keyword to mock such a built-in function (a feature introduced in OPA v0.40.0), isn’t taken into account by WithUnsafeBuiltins. Multiple conditions need to be met in order to create an adverse effect. Version 0.43.1 contains a patch for this issue. As a workaround, avoid using the WithUnsafeBuiltins function and use the capabilities feature instead.

References:

• NIST: https://nvd.nist.gov/vuln/detail/CVE-2022-36085
• JSON: https://github.com/CVEProject/cvelist/tree/3e8b046a6fc7f0d3e5f546ebd1449832a6cfefef/2022/36xxx/CVE-2022-36085.json
• web: GHSA-f524-rf33-2jjr
• fix: compiler: allow for mocking built-in functions via "with" open-policy-agent/opa#4540
• fix: ast+topdown+planner: non-built-in function mocking open-policy-agent/opa#4616
• fix: open-policy-agent/opa@25a597b
• fix: open-policy-agent/opa@3e8c754
• web: https://github.com/open-policy-agent/opa/releases/tag/v0.43.1
• Imported by: https://pkg.go.dev/github.com/open-policy-agent/opa?tab=importedby

See doc/triage.md for instructions on how to triage this report.

modules:
  - module: github.com/open-policy-agent/opa
    packages:
      - package: opa
description: |
    Open Policy Agent (OPA) is an open source, general-purpose policy engine. The Rego compiler provides a (deprecated) `WithUnsafeBuiltins` function, which allows users to provide a set of built-in functions that should be deemed unsafe — and as such rejected — by the compiler if encountered in the policy compilation stage. A bypass of this protection has been found, where the use of the `with` keyword to mock such a built-in function (a feature introduced in OPA v0.40.0), isn’t taken into account by `WithUnsafeBuiltins`. Multiple conditions need to be met in order to create an adverse effect. Version 0.43.1 contains a patch for this issue. As a workaround, avoid using the `WithUnsafeBuiltins` function and use the `capabilities` feature instead.
cves:
  - CVE-2022-36085
references:
  - web: https://github.com/open-policy-agent/opa/security/advisories/GHSA-f524-rf33-2jjr
  - fix: https://github.com/open-policy-agent/opa/pull/4540
  - fix: https://github.com/open-policy-agent/opa/pull/4616
  - fix: https://github.com/open-policy-agent/opa/commit/25a597bc3f4985162e7f65f9c36599f4f8f55823
  - fix: https://github.com/open-policy-agent/opa/commit/3e8c754ed007b22393cf65e48751ad9f6457fee8
  - web: https://github.com/open-policy-agent/opa/releases/tag/v0.43.1

[gopherbot]

Change https://go.dev/cl/430362 mentions this issue: data/reports: add GO-2022-0978.yaml for CVE-2022-36085

[gopherbot]

Change https://go.dev/cl/432417 mentions this issue: data/reports: add ghsa for GO-2022-0978.yaml