CVE-2022-23628

MEDIUM
Published Feb 9, 20224y ago · Modified Jun 17, 20262w ago
5.3 CVSS 3.1
Medium
Find Similar
Published Feb 9, 2022 4y ago
Last Modified Jun 17, 2026 2w ago

Description

OPA is an open source, general-purpose policy engine. Under certain conditions, pretty-printing an abstract syntax tree (AST) that contains synthetic nodes could change the logic of some statements by reordering array literals. Example of policies impacted are those that parse and compare web paths. **All of these** three conditions have to be met to create an adverse effect: 1. An AST of Rego had to be **created programmatically** such that it ends up containing terms without a location (such as wildcard variables). 2. The AST had to be **pretty-printed** using the `github.com/open-policy-agent/opa/format` package. 3. The result of the pretty-printing had to be **parsed and evaluated again** via an OPA instance using the bundles, or the Golang packages. If any of these three conditions are not met, you are not affected. Notably, all three would be true if using **optimized bundles**, i.e. bundles created with `opa build -O=1` or higher. In that case, the optimizer would fulfil condition (1.), the result of that would be pretty-printed when writing the bundle to disk, fulfilling (2.). When the bundle was then used, we'd satisfy (3.). As a workaround users may disable optimization when creating bundles.

CVSS Details

Base Score
5.3
Exploitability
3.9
Impact
1.4
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity Low
Availability None

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-682

Affected Products 1

VendorProductVersionRange
openpolicyagentopen_policy_agent*≥0.33.1  –  <0.37.0

References 4

  • github.com https://github.com/open-policy-agent/opa/commit/932e4ffc37a590ace79e9b75ca4340288c220239
    PatchThird Party Advisory
  • github.com https://github.com/open-policy-agent/opa/commit/bfd984ddf93ef2c4963a08d4fdadae0bcf1a3717
    PatchThird Party Advisory
  • github.com https://github.com/open-policy-agent/opa/pull/3851
    Issue TrackingPatchThird Party Advisory
  • github.com https://github.com/open-policy-agent/opa/security/advisories/GHSA-hcw3-j74m-qc58
    ExploitPatchThird Party Advisory

Remediation

  • github.com https://github.com/open-policy-agent/opa/commit/932e4ffc37a590ace79e9b75ca4340288c220239
    PatchThird Party Advisory
  • github.com https://github.com/open-policy-agent/opa/commit/bfd984ddf93ef2c4963a08d4fdadae0bcf1a3717
    PatchThird Party Advisory
  • github.com https://github.com/open-policy-agent/opa/pull/3851
    Issue TrackingPatchThird Party Advisory
  • github.com https://github.com/open-policy-agent/opa/security/advisories/GHSA-hcw3-j74m-qc58
    ExploitPatchThird Party Advisory