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Jetty CERT mitigation

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This commit is contained in:
Mike Primm 2019-12-22 18:13:50 -06:00
parent 58186bd478
commit e9e34e0e90
1 changed files with 22 additions and 3 deletions
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25
DynmapCore/src/main/java/org/dynmap/servlet/FileResourceHandler.java
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@ -11,6 +11,10 @@ import java.io.File;
import java.io.IOException; import java.io.IOException;
import java.net.MalformedURLException; import java.net.MalformedURLException;
import java.lang.reflect.Method;
import java.lang.reflect.Field;
import java.lang.Class;
public class FileResourceHandler extends ResourceHandler { public class FileResourceHandler extends ResourceHandler {
private static String getNormalizedPath(String p) { private static String getNormalizedPath(String p) {
p = p.replace('\\', '/'); p = p.replace('\\', '/');
@ -44,9 +48,10 @@ public class FileResourceHandler extends ResourceHandler {
@Override @Override
public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
Resource resource; Resource resource;
target = getNormalizedPath(target); String normalizedTarget = getNormalizedPath(target);
try { try {
resource = getResource(target); resource = getResource(normalizedTarget);
} catch(MalformedURLException ex) { } catch(MalformedURLException ex) {
return; return;
} }
@ -57,6 +62,20 @@ public class FileResourceHandler extends ResourceHandler {
if (file == null) { if (file == null) {
return; return;
} }
super.handle(target, baseRequest, request, response); if(!target.equals(normalizedTarget)){
baseRequest.setRequestURI(normalizedTarget);
baseRequest.setPathInfo(normalizedTarget);
try{
Class<?> requestClass = request.getClass();
Field field = requestClass.getDeclaredField("_pathInfo");
field.setAccessible(true);
field.set(request, normalizedTarget);
} catch (Exception ignore) {
//It's unsafe to continue since these lines will be triggered by only malicious requests.
ignore.printStackTrace();
return;
}
}
super.handle(normalizedTarget, baseRequest, request, response);
} }
} }