Vulnerability Details : 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.
Vulnerability category: Input validation
Products affected by CVE-2022-36085
- cpe:2.3:a:openpolicyagent:open_policy_agent:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2022-36085
0.34%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 71 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2022-36085
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST | |
|
7.4
|
HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
2.2
|
5.2
|
GitHub, Inc. |
CWE ids for CVE-2022-36085
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The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.Assigned by: security-advisories@github.com (Secondary)
-
The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.Assigned by: security-advisories@github.com (Secondary)
References for CVE-2022-36085
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https://github.com/open-policy-agent/opa/security/advisories/GHSA-f524-rf33-2jjr
Compiler: Bypass of WithUnsafeBuiltins using "with" keyword to mock functions · Advisory · open-policy-agent/opa · GitHubExploit;Patch;Third Party Advisory
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https://github.com/open-policy-agent/opa/releases/tag/v0.43.1
Release v0.43.1 · open-policy-agent/opa · GitHubThird Party Advisory
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https://github.com/open-policy-agent/opa/commit/25a597bc3f4985162e7f65f9c36599f4f8f55823
ast/compile: respect unsafeBuiltinMap for 'with' replacements (#5107) · open-policy-agent/opa@25a597b · GitHubPatch;Third Party Advisory
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https://github.com/open-policy-agent/opa/commit/3e8c754ed007b22393cf65e48751ad9f6457fee8
ast/compile: respect unsafeBuiltinMap for 'with' replacements · open-policy-agent/opa@3e8c754 · GitHubPatch;Third Party Advisory
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https://github.com/open-policy-agent/opa/pull/4540
compiler: allow for mocking built-in functions via "with" by srenatus · Pull Request #4540 · open-policy-agent/opa · GitHubExploit;Patch;Third Party Advisory
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https://github.com/open-policy-agent/opa/pull/4616
ast+topdown+planner: non-built-in function mocking by srenatus · Pull Request #4616 · open-policy-agent/opa · GitHubExploit;Patch;Third Party Advisory
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