CVE-2022-36085
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.
| Software | From | Fixed in |
|---|---|---|
| openpolicyagent / open_policy_agent | 0.40.0 | 0.43.1 |
github.com/open-policy-agent/opa
|
0.40.0 | 0.43.1 |
- https://github.com/open-policy-agent/opa/commit/25a597bc3f4985162e7f65f9c36599f4f8f55823
- https://github.com/open-policy-agent/opa/commit/3e8c754ed007b22393cf65e48751ad9f6457fee8
- https://github.com/open-policy-agent/opa/pull/4540
- https://github.com/open-policy-agent/opa/pull/4616
- https://github.com/open-policy-agent/opa/releases/tag/v0.43.1
- https://github.com/open-policy-agent/opa/security/advisories/GHSA-f524-rf33-2jjr
- https://pkg.go.dev/vuln/GO-2022-0978
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