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Issue 3720: Java 2 Security issue #3721

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Merged
parrt merged 1 commit into from
Jun 25, 2022
Merged

Issue 3720: Java 2 Security issue #3721

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15 changes: 10 additions & 5 deletions runtime/Java/src/org/antlr/v4/runtime/atn/ParserATNSimulator.java
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,9 @@
import org.antlr.v4.runtime.misc.IntervalSet;
import org.antlr.v4.runtime.misc.Pair;

import java.security.AccessController;
import java.security.PrivilegedAction;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.BitSet;
Expand Down Expand Up @@ -2184,11 +2187,13 @@ public Parser getParser() {

public static String getSafeEnv(String envName) {
try {
return System.getenv(envName);
}
catch(SecurityException e) {
// use the default value
}
return AccessController.doPrivileged(new PrivilegedAction<String>() {
@Override
public String run() {
return System.getenv(envName);
}
});
} catch (SecurityException e) { }
return null;
}
}