1. A cross-site vulnerability is detected in the target URL, and a frame injection vulnerability in the target URL is detected.
solution:
The first step: web.xml registration listener
<filter> <filter-name>XssFilter</filter-name> <filter-class>com.weichai.common.filter.XssFilter</filter-class> </filter> <filter-mapping> <filter-name>XssFilter</filter-name> <url-pattern>/*</url-pattern> <dispatcher>REQUEST</dispatcher> </filter-mapping>
Step 2: Create a listener implementation class
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
public class XssFilter implements Filter {
FilterConfig filterConfig = null;
@Override
public void init(FilterConfig filterConfig) throws ServletException {
this.filterConfig = filterConfig;
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
chain.doFilter(new XssHttpServletRequestWrapperNew(
(HttpServletRequest) request), response);
}
@Override
public void destroy() {
this.filterConfig = null;
}
}
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.text.CharacterIterator;
import java.text.StringCharacterIterator;
import java.util.regex.Pattern;
public class XssHttpServletRequestWrapperNew extends HttpServletRequestWrapper{
HttpServletRequest orgRequest = null;
public XssHttpServletRequestWrapperNew(HttpServletRequest request) {
super(request);
orgRequest = request;
}
/**
* Override the getParameter method, and filter the parameter name and parameter value by xss.
* If you need to get the original value, get it through super.getParameterValues(name)
* getParameterNames, getParameterValues and getParameterMap may also need to be overridden
*/
@Override
public String getParameter(String name) {
String value = super.getParameter(xssEncode(name));
if (value != null) {
value = xssEncode(value);
value = HTMLEncode(value);
}
return value;
}
/**
* Escape some special characters
*/
public static String HTMLEncode(String aText){
final StringBuilder result = new StringBuilder();
final StringCharacterIterator iterator = new StringCharacterIterator(aText);
char character = iterator.current();
while (character != CharacterIterator.DONE ){
if (character == '<') {
result.append("<");
} else if (character == '>') {
result.append(">");
} else if (character == '&') {
result.append("&");
} else if (character == '\"') {
result.append(""");
} else {
result.append(character);
}
character = iterator.next();
}
return result.toString();
}
/**
* Override the getHeader method, and filter the parameter name and parameter value by xss. If you need to get the original value, get it through super.getHeaders(name)
* getHeaderNames may also need to be overridden
*/
@Override
public String getHeader(String name) {
String value = super.getHeader(xssEncode(name));
if (value != null) {
value = xssEncode(value);
}
return value;
}
/**
* Directly replace half-width characters that easily cause xss vulnerabilities with full-width characters
* At present, xssProject requires the injection code to be parsed only if the start tag and end tag (such as <script></script>) match correctly, otherwise an error will be reported; therefore, you can only replace xssProject with a custom implementation
* @param s
* @return
*/
private static String xssEncode(String s) {
if (s == null || s.isEmpty()) {
return s;
}
String result = stripXSS(s);
if (null != result) {
result = escape(result);
}
return result;
}
public static String escape(String s) {
StringBuilder sb = new StringBuilder(s.length() + 16);
for (int i = 0; i < s.length(); i++) {
char c = s.charAt(i);
switch (c) {
case '>':
sb.append('>');// full-width greater than sign
break;
case '<':
sb.append('<');// full-width less than sign
break;
case '\'':
sb.append(''');// full-width single quotes
break;
case '\"':
sb.append('"');// full-width double quotes
break;
case '\\':
sb.append('\');// full-width slash
break;
case '%':
sb.append('%'); // full-width colon
break;
default:
sb.append(c);
break;
}
}
return sb.toString();
}
private static String stripXSS(String value) {
if (value != null) {
// Avoid null characters
value = value.replaceAll("", "");
// Avoid anything between script tags
Pattern scriptPattern = Pattern.compile("<script>(.*?)</script>",
Pattern.CASE_INSENSITIVE);
value = scriptPattern.matcher(value).replaceAll("");
// Avoid anything in a src='...' type of expression
scriptPattern = Pattern.compile("src[\r\n]*=[\r\n]*\\\'(.*?)\\\'",
Pattern.CASE_INSENSITIVE | Pattern.MULTILINE
| Pattern.DOTALL);
value = scriptPattern.matcher(value).replaceAll("");
scriptPattern = Pattern.compile("src[\r\n]*=[\r\n]*\\\"(.*?)\\\"",
Pattern.CASE_INSENSITIVE | Pattern.MULTILINE
| Pattern.DOTALL);
value = scriptPattern.matcher(value).replaceAll("");
// Remove any lonesome </script> tag
scriptPattern = Pattern.compile("</script>",
Pattern.CASE_INSENSITIVE);
value = scriptPattern.matcher(value).replaceAll("");
// Remove any lonesome <script ...> tag
scriptPattern = Pattern.compile("<script(.*?)>",
Pattern.CASE_INSENSITIVE | Pattern.MULTILINE
| Pattern.DOTALL);
value = scriptPattern.matcher(value).replaceAll("");
// Avoid eval(...) expressions
scriptPattern = Pattern.compile("eval\\((.*?)\\)",
Pattern.CASE_INSENSITIVE | Pattern.MULTILINE
| Pattern.DOTALL);
value = scriptPattern.matcher(value).replaceAll("");
// Avoid expression(...) expressions
scriptPattern = Pattern.compile("expression\\((.*?)\\)",
Pattern.CASE_INSENSITIVE | Pattern.MULTILINE
| Pattern.DOTALL);
value = scriptPattern.matcher(value).replaceAll("");
// Avoid javascript:... expressions
scriptPattern = Pattern.compile("javascript:",
Pattern.CASE_INSENSITIVE);
value = scriptPattern.matcher(value).replaceAll("");
// Avoid vbscript:... expressions
scriptPattern = Pattern.compile("vbscript:",
Pattern.CASE_INSENSITIVE);
value = scriptPattern.matcher(value).replaceAll("");
// Avoid onload= expressions
scriptPattern = Pattern.compile("onload(.*?)=",
Pattern.CASE_INSENSITIVE | Pattern.MULTILINE
| Pattern.DOTALL);
value = scriptPattern.matcher(value).replaceAll("");
scriptPattern = Pattern.compile("<iframe>(.*?)</iframe>",
Pattern.CASE_INSENSITIVE);
value = scriptPattern.matcher(value).replaceAll("");
scriptPattern = Pattern.compile("</iframe>",
Pattern.CASE_INSENSITIVE);
value = scriptPattern.matcher(value).replaceAll("");
// Remove any lonesome <script ...> tag
scriptPattern = Pattern.compile("<iframe(.*?)>",
Pattern.CASE_INSENSITIVE | Pattern.MULTILINE
| Pattern.DOTALL);
value = scriptPattern.matcher(value).replaceAll("");
}
return value;
}
/**
* Get the original request
*
* @return
*/
public HttpServletRequest getOrgRequest() {
return orgRequest;
}
/**
* Static method to get the most original request
*
* @return
*/
public static HttpServletRequest getOrgRequest(HttpServletRequest req) {
if (req instanceof XssHttpServletRequestWrapperNew) {
return ((XssHttpServletRequestWrapperNew) req).getOrgRequest();
}
return req;
}
}
2. Multiple Input Validation Vulnerabilities in Apache Geronimo Application Server
solution:
When this problem occurs, the version of Tomcat applied is 7.0.551. The solution is to upgrade the version of tomcat to version 7.0.79, which is the latest version in the 7 series. Please download the specific software from the Apache official website.