[
https://issues.apache.org/jira/browse/JEXL-446?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Henri Biestro resolved JEXL-446.
--------------------------------
Resolution: Fixed
Diagnostic and #PR are accurate and efficient; thanks again [~wrprice]
> ClassTool module inspection is too strict
> -----------------------------------------
>
> Key: JEXL-446
> URL: https://issues.apache.org/jira/browse/JEXL-446
> Project: Commons JEXL
> Issue Type: Bug
> Affects Versions: 3.5.0
> Reporter: William Price
> Assignee: Henri Biestro
> Priority: Major
> Fix For: 3.6.0
>
>
> [ClassTool#isExported|https://github.com/apache/commons-jexl/blob/master/src/main/java/org/apache/commons/jexl3/internal/introspection/ClassTool.java#L125]
> calls [Module#isExported(String
> packageName)|https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/lang/Module.html#isExported(java.lang.String)]
> via a MethodHandle. However, that method checks if the target package is
> exported *unconditionally* (to all modules) which is too restrictive.
> In my modularized application, I can use a *qualified export* and have more
> granular control following the principle of least privilege:
>
> {code:java}
> module my.module {
> exports my.module.package to org.apache.commons.jexl3;
> }{code}
> Because `my.module.package` is not unqualified, it is not exported
> unconditionally and Module#isExported("my.module.package") returns false,
> preventing Jexl from accessing classes in that package.
> ClassTool should instead check that the package is exported to *at least*
> Jexl's own module using [Module#isExported(String packageName, Module
> module)|https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/lang/Module.html#isExported(java.lang.String,java.lang.Module)]
> as this tests whether Jexl is allowed to reflect over public API and no more.
> As a workaround the package can be exported unconditionally, but this may not
> be desirable as it impacts encapsulation and security in other parts of the
> larger program:
> {code:java}
> module my.module {
> exports my.module.package;
> } {code}
>
>
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
