CVE-2022-23628 : Security Advisory and Response
Uncover the array literal misordering vulnerability in GitHub's OPA policy engine. Learn about the impact, affected versions, and mitigation steps for CVE-2022-23628.
Array literal misordering vulnerability has been discovered in GitHub's open-source policy engine, OPA. This vulnerability could lead to a change in the logic of certain statements when pretty-printing an abstract syntax tree (AST) that contains synthetic nodes by reordering array literals.
Understanding CVE-2022-23628
In this section, we will delve into the details of the CVE-2022-23628 vulnerability affecting open-policy-agent/opa.
What is CVE-2022-23628?
OPA is an open-source policy engine susceptible to a vulnerability that results in array literal misordering. This vulnerability occurs when certain conditions are met when pretty-printing an abstract syntax tree (AST) with synthetic nodes, potentially leading to a logic change in specific statements.
The Impact of CVE-2022-23628
The vulnerability poses a medium severity risk with a base score of 6.3. It could affect the confidentiality, integrity, and availability of systems utilizing the affected versions of OPA.
Technical Details of CVE-2022-23628
Let's explore the technical aspects of the CVE-2022-23628 vulnerability.
Vulnerability Description
The vulnerability arises due to the misordering of array literals during the pretty-printing of AST with synthetic nodes, impacting certain statements' logic.
Affected Systems and Versions
The vulnerability affects versions of OPA ranging from 0.33.1 to 0.37.0.
Exploitation Mechanism
Exploitation of this vulnerability involves programmatically creating an AST of Rego with wildcard variables, pretty-printing it with the 'github.com/open-policy-agent/opa/format' package, and parsing and evaluating the result.
Mitigation and Prevention
Discover the steps to mitigate and prevent the CVE-2022-23628 vulnerability.
Immediate Steps to Take
Users are advised to disable optimization when creating bundles as a workaround to mitigate the vulnerability.
Long-Term Security Practices
Implement secure coding practices and regularly update OPA to the latest non-affected versions.
Patching and Updates
Stay informed about patches and updates released by the open-policy-agent project to address the CVE-2022-23628 vulnerability.