我使用过滤器来修复 XSS。但是当我使用 fortify 软件扫描我的代码时,XSS 问题的数量并没有改变。我错过了什么?或 Fortify 无法识别过滤器?这是我的过滤器代码:
public final class RequestWrapper extends HttpServletRequestWrapper {
public RequestWrapper(HttpServletRequest servletRequest) {
super(servletRequest);
}
public String[] getParameterValues(String parameter) {
String[] values = super.getParameterValues(parameter);
if (values==null) {
return null;
}
int count = values.length;
String[] encodedValues = new String[count];
for (int i = 0; i < count; i++) {
encodedValues[i] = cleanXSS(values[i]);
}
return encodedValues;
}
public String getParameter(String parameter) {
String value = super.getParameter(parameter);
if (value == null) {
return null;
}
return cleanXSS(value);
}
public String getHeader(String name) {
String value = super.getHeader(name);
if (value == null)
return null;
return cleanXSS(value);
}
private String cleanXSS(String value) {
System.out.println("filter : " + value);
//System.out.println("afterfilter : " + (isNotEmptyOrNull(value) ? StringEscapeUtils.escapeHtml4(value) : value));
//return isNotEmptyOrNull(value) ? StringEscapeUtils.escapeHtml4(value) : value;
if(isNotEmptyOrNull(value)){
value = value.replaceAll("<", "<").replaceAll(">", ">");
value = value.replaceAll("\\(", "(").replaceAll("\\)", ")");
value = value.replaceAll("'", "'");
value = value.replaceAll("eval\\((.*)\\)", "");
value = value.replaceAll("[\\\"\\\'][\\s]*javascript:(.*)[\\\"\\\']", "\"\"");
value = value.replaceAll("script", "");
}
System.out.println("afterfilter : " +value);
return value;
}
public static boolean isNotEmptyOrNull(String string) {
if (string != null && !"".equals(string.trim())) {
return true;
}
return false;
}
}