I think I am getting this vulnerability from the ServletRequest.I understand I have to do some sort of encoding/decoding to resolve this XXS vulnerability, but not sure how. Can someone please help?
Checkmarx highlights parameters HttpMethod & HttpServletRequest saying:The method getEntity embeds untrusted data in generated output with body. This untrusted data is embedded into output without proper sanitization or encoding. The attacked would be able to alter the returned web page by simply providing modified data in user input method, which is read by the serverProxy method line public ResponseEntity serverProxy(@RequestBody(required = false) String body, HttpServletRequest servletRequest,HttpMethod httpMethod, JwtAuthenticationToken jwtAuthenticationToken) {and linevar uri = ServletUriComponentsBuilder.fromRequest(servletRequest)
import lombok.extern.slf4j.slf4j;import org.springframework.beans.factory.annotation.Value;import org.springframework.http.HttpEntity;import org.springframework.http.HttpMethod;import org.springframework.http.ResponseEntity;import org.springframework.security.oauth2.server.resource.authentication.JwtAuthenticationToken;import org.springframework. stereotype.Controller;import org.springframework.web.bind.annotation. RequestBody;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.client.HttpStatusCodeException;import org.springframework.web.client.RestTemplate;import org.springframework.web.servlet.support.ServletUriComponentsBuilder; import ac.temp.events .app.service.ProxyControllerService;import ac.temp.events.app.service.ServiceHelper;import jakarta.servlet.http.HttpServletRequest;import java.net.URI;import java.net.URISyntaxException;import java.util.Set;@Controller@Slf4jpublic class RestProxyControllerService { private final RestTemplate RestTemplate; private final URI proxyUri; private final ProxyControllerService controllerService; private final ServiceHelper serviceHelper; public RestProxyController(ResrTemplate, restTemplate, @Value("${proxy.url") String proxyUrl, ProxyControllerService controllerService, ServiceHelper serviceHelper) { this.restTemplate = restTemplate; this.proxyUri= new URI(proxyUrl); this.controllerService = controllerService; this.serviceHelper = serviceHelper; } @RequestMapping(${proxy.contextPath}) public ResponseEntity<String> serverProxy(@RequestBody(required = false) String body, HttpServletRequest servletRequest, HttpMethod httpMethod, JwtAuthenticationToken jwtAuthenticationToken) { Set<String> userRoles = serviceHelper.getRoles(jwtAuthenticationToken); var uri = ServletUriComponentsBuilder.fromRequest(servletRequest) .host(proxyUri.getHost()) .port(proxyUri.getPort()) .scheme(proxyUri.getScheme()) .build(true) .toUri(); var httpEntity = new HttpEntity<>(body, controllerService.createRequestHeader(servletRequest, proxyUri.getHost(), userRoles)); try { return controllerService.createResponseEntity(restTemplate.exchange(uri, method, httpEntity. String.class)); } catch (HttpStatusCodeException exp) { return controllerService.createErrorResponseEntity(exp); } }}Not sure what to tr. I don't have anymore details to add.
