├── LICENSE ├── README.md ├── Upload ├── filter.php ├── lib.php ├── protect.sh ├── waf.php └── waf_config.php ├── img └── result.png ├── waf_WatchDog.exe └── waf_WatchDog.py /LICENSE: -------------------------------------------------------------------------------- 1 | GNU LESSER GENERAL PUBLIC LICENSE 2 | Version 2.1, February 1999 3 | 4 | Copyright (C) 1991, 1999 Free Software Foundation, Inc. 5 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 6 | Everyone is permitted to copy and distribute verbatim copies 7 | of this license document, but changing it is not allowed. 8 | 9 | [This is the first released version of the Lesser GPL. It also counts 10 | as the successor of the GNU Library Public License, version 2, hence 11 | the version number 2.1.] 12 | 13 | Preamble 14 | 15 | The licenses for most software are designed to take away your 16 | freedom to share and change it. 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Here is a sample; alter the names: 496 | 497 | Yoyodyne, Inc., hereby disclaims all copyright interest in the 498 | library `Frob' (a library for tweaking knobs) written by James Random 499 | Hacker. 500 | 501 | , 1 April 1990 502 | Ty Coon, President of Vice 503 | 504 | That's all there is to it! 505 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # EasyPHPWaf 2 | ## 描述 3 | 本项目是一款简单,智(粗) 能( 暴)为PHP架设保姆级WEB防火墙,适用于国内高校赛CTF比赛中AWD环节,提供日志审查、抓取payload、过滤未知威胁操作,误杀率较低,**本waf不会die掉任何请求只会自动替换掉敏感请求数据**.并配备监控脚本用于查看当前受攻击情况. 4 | ## 特性 5 | * mysql注入过滤✔ 6 | * 实时监控客户端✔ 7 | * 过滤未知攻击参数✔ 8 | * 拦截带有flag标识的访问✔ 9 | * 请求数据dump✔ 10 | * 调用文件栈输出✔ 11 | * 记录过滤事件溯源✔ 12 | * 支持namespace✔ 13 | * 遍历反解与过滤base64编码的payload✔ 14 | ## 目录结构 15 | ``` 16 | │ README.md //说明文件 17 | │ waf_WatchDog.exe //Window监控脚本客户端 18 | │ waf_WatchDog.py //python监控脚本源码 19 | └─Upload //上传目录 20 | filter.php //过滤文件 21 | lib.php //防火墙核心库 22 | waf.php //入口文件 23 | waf_config.php //配置文件 24 | protect.sh //一键部署脚本 25 | ``` 26 | ## 使用方法 27 | ### 服务端 28 | * 把upload文件夹内的文件 传至tmp目录 29 | * 备份: ```./protect.sh /var/www/html gameboxname backup ``` 30 | * 设置waf: ```./protect.sh /var/www/html gameboxname setwaf ``` 31 | * 还原: ```./protect.sh /var/www/html gameboxname reload ``` 32 | ### 监控端 33 | * 启动监听 ```./waf_WatchDog.py Gamebox1 http://172.17.0.2/ hRwNxiAPJaJIJUHUKbN3Q5awoMn90WQ6``` 34 | ## 效果 35 | ![img](./img/result.png) 36 | 37 | - gamebox3 gamebox4均为PHP环境 38 | 39 | ## 结语 40 | 如果你对本项目十分感兴趣请Star,Follow,如果有问题或能有bypass的地方请提出issue 41 | -------------------------------------------------------------------------------- /Upload/filter.php: -------------------------------------------------------------------------------- 1 | $kv) { 27 | $GLOBALS["WafFilterBuildInFunction_KeyWords"] = array_merge($GLOBALS["WafFilterBuildInFunction_KeyWords"], $kv); 28 | } 29 | $GLOBALS["WafFilterBuildInFunction_KeyWords"] = array_merge($GLOBALS["WafFilterBuildInFunction_KeyWords"], ["eval"]); 30 | usort($GLOBALS["WafFilterBuildInFunction_KeyWords"], function ($a, $b) { 31 | return strlen($b) >= strlen($a); 32 | }); 33 | } 34 | $keyWords = $GLOBALS["WafFilterBuildInFunction_KeyWords"]; 35 | $touchKey = []; 36 | $raw_value = $value; 37 | $isChange = false; 38 | foreach ($keyWords as $key => $kv) { 39 | if (strlen($kv) > 3 && strlen($value) >= strlen($kv) && strstr($value, $kv) && !in_array($kv, $whileKeyWord)) { 40 | $change = str_replace($kv, GenerateRandomString(strlen($kv)), $value); 41 | if ($value != $change) { 42 | array_push($touchKey, $kv); 43 | } 44 | $value = $change; 45 | } 46 | } 47 | if ($raw_value != $value) { 48 | WafFilterLog("WafFilterBuildInFunction", $raw_value, $value, $touchKey, $waf_gobal_name); 49 | } 50 | $GLOBALS["WafFilterBuildInFunction_ISLoad_" . md5($value)] = true; 51 | return $value; 52 | } 53 | //通用过滤 54 | function WafFilterSymbol($value, $key, $data, $waf_gobal_name) 55 | { 56 | //配置 57 | $keyWords = []; 58 | //For Symbol 59 | $keyWords = array_merge($keyWords, explode(" ", " php \$_ \$ () ( %")); 60 | $touchKey = []; 61 | //处理数据库 62 | $raw_value = $value; 63 | $isChange = false; 64 | foreach ($keyWords as $key => $kv) { 65 | 66 | $change = str_ireplace($kv, GenerateRandomString(strlen($kv)), $value); 67 | if ($value != $change) { 68 | array_push($touchKey, $kv); 69 | } 70 | $value = $change; 71 | } 72 | if ($raw_value != $value) { 73 | 74 | WafFilterLog("WafFilterSymbol", $raw_value, $value, $touchKey, $waf_gobal_name); 75 | } 76 | return $value; 77 | } 78 | 79 | //通用过滤 80 | function WafFilterCommon($value, $key, $data, $waf_gobal_name) 81 | { 82 | //配置 83 | $keyWords = []; 84 | //For PHP Code 85 | $keyWords = array_merge($keyWords, explode(" ", "base64_ file_ include require urlencode")); 86 | //For Sql 87 | $keyWords = array_merge($keyWords, explode(" ", "select insert update drop delete")); 88 | //For Symbol 89 | $keyWords = array_merge($keyWords, explode(" ", " php \$_ () ( %")); 90 | $touchKey = []; 91 | //处理数据库 92 | $raw_value = $value; 93 | $isChange = false; 94 | foreach ($keyWords as $key => $kv) { 95 | 96 | $change = str_ireplace($kv, GenerateRandomString(strlen($kv)), $value); 97 | if ($value != $change) { 98 | array_push($touchKey, $kv); 99 | } 100 | $value = $change; 101 | } 102 | if ($raw_value != $value) { 103 | 104 | WafFilterLog("WafFilterCommon", $raw_value, $value, $touchKey, $waf_gobal_name); 105 | } 106 | return $value; 107 | } 108 | //通用过滤 109 | function WafFilterFunctionString($value, $key, $data, $waf_gobal_name) 110 | { 111 | //配置 112 | $keyWords = []; 113 | //For PHP Code 114 | $keyWords = array_merge($keyWords, explode(" ", "eval system preg_replace create_function array_map call_user_func call_user_func_array assert dumpfile outfile load_file rename extractvalue updatexml name_const multipoint")); 115 | $keyWords = array_merge($keyWords, explode(" ", "base64_ file_ include require urlencode")); 116 | //For Sql 117 | $keyWords = array_merge($keyWords, explode(" ", "select insert update drop delete")); 118 | //For Symbol 119 | $keyWords = array_merge($keyWords, explode(" ", " :{ php \$_")); 120 | //处理数据库 121 | $raw_value = $value; 122 | $isChange = false; 123 | $touchKey = []; 124 | foreach ($keyWords as $key => $kv) { 125 | $change = str_ireplace($kv, GenerateRandomString(strlen($kv)), $value); 126 | $value = $change; 127 | if ($value != $change) { 128 | array_push($touchKey, $kv); 129 | } 130 | } 131 | if ($raw_value != $value) { 132 | 133 | WafFilterLog("WafFilterFunctionString", $raw_value, $value, $touchKey, $waf_gobal_name); 134 | } 135 | return $value; 136 | } 137 | //Base64过滤 138 | function WafFilterBase64($value, $key, $data, $waf_gobal_name) 139 | { 140 | $CellWafFilteFunctionList = ["WafFilterFlagKeywords", "WafFilterFunctionString"]; 141 | $output_array = []; 142 | $_change_value = $value; 143 | if (preg_match('/[a-zA-Z0-9\+\=]{1,}/i', $value, $output_array) > 0) { 144 | foreach ($output_array as $key => $ov) { 145 | $raw_value = base64_decode($ov); 146 | $change_value = $raw_value; 147 | foreach ($CellWafFilteFunctionList as $fnkey => $fn) { 148 | $change_value = $fn($change_value, $value, [$ov => $raw_value], $waf_gobal_name); 149 | } 150 | if ($change_value != $raw_value) { 151 | $_change_value = str_replace($ov, base64_encode($change_value), $_change_value); 152 | } 153 | } 154 | } 155 | if ($_change_value != $value) { 156 | WafFilterLog("WafFilterBase64", $value, $_change_value, [], $waf_gobal_name); 157 | $value = $_change_value; 158 | } 159 | 160 | return $value; 161 | } 162 | 163 | //AWD CTF 过滤Flag 164 | function WafFilterFlagKeywords($value, $key, $data, $waf_gobal_name) 165 | { 166 | $change_value = preg_replace('/(f(.*?)l(.*?)a(.*?)g$)/i', GenerateRandomString(rand(10, 100)), $value); 167 | if ($value != $change_value) { 168 | $touchKey = []; 169 | preg_match('/(f(.*?)l(.*?)a(.*?)g$)/i', $value, $touchKey); 170 | WafFilterLog("WafFilterFlagKeywords", $value, $change_value, $touchKey, $waf_gobal_name); 171 | $GLOBALS[$waf_gobal_name]["_BaseInfo"]["IsDanger"] = true; 172 | } 173 | $value = $change_value; 174 | return $value; 175 | } 176 | 177 | function WafFilterDataLoop($data, $filterFn, $waf_gobal_name) 178 | { 179 | foreach ($data as $key => $value) { 180 | $type = gettype($value); 181 | if ($type == "array") { 182 | $data[$key] = WafFilterDataLoop($value, $filterFn, $waf_gobal_name); 183 | } else if ($type == "object") { 184 | unset($data[$key]); 185 | } else { 186 | $data[$key] = $filterFn($value, $key, $data, $waf_gobal_name); 187 | } 188 | } 189 | return $data; 190 | } 191 | 192 | //生成随机字符串 193 | function GenerateRandomString($length) 194 | { 195 | $characters = '0123456789abcdeghijklmnopqrstuvwxyzABCDEGHIJKLMNOPQRSTUVWXYZ'; 196 | $randomString = ''; 197 | for ($i = 0; $i < $length; $i++) { 198 | $randomString .= $characters[rand(0, strlen($characters) - 1)]; 199 | } 200 | return $randomString; 201 | } 202 | 203 | 204 | 205 | function WafFilterLog($actionName, $beforeData, $afterData, $touchKeys, $waf_gobal_name) 206 | { 207 | array_push($GLOBALS[$waf_gobal_name]["_FilterAction"], [ 208 | "actionName" => $actionName, 209 | "touchKeys" => $touchKeys, 210 | "beforeData" => $beforeData, 211 | "afterData" => $afterData 212 | ]); 213 | } 214 | 215 | 216 | function WafArrayFilter($CellWafFilterTarget, $CellWafFilteFunctionList, $waf_gobal_name) 217 | { 218 | //执行过程 219 | foreach ($CellWafFilterTarget as $key => $value) { 220 | foreach ($CellWafFilteFunctionList as $fnkey => $fn) { 221 | $CellWafFilterTarget[$key] = WafFilterDataLoop($CellWafFilterTarget[$key], $fn, $waf_gobal_name); 222 | } 223 | } 224 | } 225 | 226 | //Waf过滤流程 227 | function WafFilterStart($waf_gobal_name) 228 | { 229 | //清除文件 230 | WafUnsetFiles(); 231 | //代码关键词过滤 232 | WafArrayFilter( 233 | [ 234 | &$_POST, 235 | &$_GET, 236 | &$_REQUEST, 237 | &$GLOBALS["_POST"], 238 | &$GLOBALS["_GET"], 239 | &$GLOBALS["_REQUEST"] 240 | ], 241 | [ 242 | "WafFilterBuildInFunction", 243 | "WafFilterSymbol" 244 | ], 245 | $waf_gobal_name 246 | ); 247 | //详细参数过滤 248 | WafArrayFilter( 249 | [ 250 | &$_POST, 251 | &$_GET, 252 | &$_REQUEST, 253 | &$_COOKIE, 254 | &$GLOBALS["_POST"], 255 | &$GLOBALS["_GET"], 256 | &$GLOBALS["_REQUEST"] 257 | ], 258 | [ 259 | "WafFilterCommon", 260 | "WafFilterFlagKeywords", 261 | "WafFilterBase64" 262 | ], 263 | $waf_gobal_name 264 | ); 265 | } 266 | 267 | function WafFilter($waf_toekn) 268 | { 269 | $waf_gobal_name = "CellWaf_" . md5($waf_toekn); 270 | WafFilterStart($waf_gobal_name); 271 | } 272 | -------------------------------------------------------------------------------- /Upload/lib.php: -------------------------------------------------------------------------------- 1 | array([ 53 | "URL" => GetProtocol() . $_SERVER['HTTP_HOST'] . ':' . $_SERVER["SERVER_PORT"] . $_SERVER["REQUEST_URI"], 54 | "IP" => GetIP(), 55 | "DateTime" => date('Y-m-d H:i:s', time()), 56 | "Time" => GetNowTime(), 57 | "IsDanger" => false, 58 | ])[0], 59 | '_WafInfo' => array($GLOBALS['Waf_PHPIFNO'])[0], 60 | '_GET' => array($GLOBALS['_GET'])[0], 61 | '_POST' => array($GLOBALS['_POST'])[0], 62 | '_COOKIE' => array($GLOBALS['_COOKIE'])[0], 63 | '_ENV' => array($GLOBALS['_ENV'])[0], 64 | '_REQUEST' => array($GLOBALS['_REQUEST'])[0], 65 | '_SERVER' => array($GLOBALS['_SERVER'])[0], 66 | '_FILES' => array($GLOBALS['_FILES'])[0], 67 | '_FilterAction' => [], 68 | '_CallStack' => [] 69 | ]; 70 | } 71 | //保存日志 72 | function WafSaveLog($waf_gobal_name) 73 | { 74 | $wafInfo = $GLOBALS['Waf_PHPIFNO']; 75 | $logFilePath = ""; 76 | if ($wafInfo) { 77 | $logFilePath = $wafInfo["protectDataPath"] . 'logs/' . $GLOBALS[$waf_gobal_name]["_BaseInfo"]["Time"] . ".log"; 78 | } 79 | //保存日志 80 | if ($logFilePath != "") { 81 | if (!is_dir(dirname($logFilePath))) { 82 | mkdir(dirname($logFilePath), 0777); 83 | } 84 | file_put_contents($logFilePath, json_encode($GLOBALS[$waf_gobal_name], JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE | JSON_PARTIAL_OUTPUT_ON_ERROR)); 85 | } 86 | } 87 | 88 | //防火墙处理 89 | function WafInit($waf_toekn) 90 | { 91 | $waf_gobal_name = "CellWaf_" . md5($waf_toekn); 92 | //数据处理保持部分 93 | if (!array_key_exists($waf_gobal_name, $GLOBALS)) { 94 | //初始化数据 95 | $GLOBALS[$waf_gobal_name] = MakeRuntimeInfo(); 96 | header("X-Protect-By: CellWaf By MoeGuo H."); 97 | } 98 | //日志文件夹路径 99 | $logFilePath = ""; 100 | $wafInfo = $GLOBALS['Waf_PHPIFNO']; 101 | if ($wafInfo) { 102 | //添加程序堆栈信息 103 | array_push($GLOBALS[$waf_gobal_name]["_CallStack"], $wafInfo["filePath"]); 104 | $logFilePath = $wafInfo["protectDataPath"] . 'logs/'; 105 | } 106 | //管理监控部分 107 | if (array_key_exists("WafAction", $_REQUEST) && $_REQUEST["waf_toekn"] === $waf_toekn) { 108 | header('Content-Type:application/json; charset=utf-8'); 109 | if ($_REQUEST["WafAction"] === "LastLogTime") { 110 | $files = scandir($logFilePath); 111 | if (!$files) { 112 | exit(json_encode(["LastLogTime" => "0"])); 113 | } 114 | $filenames = []; 115 | foreach ($files as $key => $value) { 116 | $name = trim(pathinfo($value, PATHINFO_FILENAME)); 117 | if (strlen($name) > 2) { 118 | array_push($filenames, $name); 119 | } 120 | } 121 | rsort($filenames); 122 | if (!$filenames[0]) { 123 | $filenames[0] = "0"; 124 | } 125 | exit(json_encode(["LastLogTime" => "$filenames[0]"])); 126 | } else if ($_REQUEST["WafAction"] === "GetLogFiles" && array_key_exists("AfterTime", $_REQUEST)) { 127 | 128 | if (!array_key_exists("BeforeTime", $_REQUEST) && $_REQUEST["BeforeTime"]) { 129 | $_REQUEST["BeforeTime"] = GetNowTime(); 130 | } 131 | $files = scandir($logFilePath); 132 | if (!$files) { 133 | exit(json_encode(["Files" => []])); 134 | } 135 | $filenames = []; 136 | foreach ($files as $key => $value) { 137 | $name = trim(pathinfo($value, PATHINFO_FILENAME)); 138 | if (strlen($name) > 2 && $_REQUEST["AfterTime"] < $name && $_REQUEST["BeforeTime"] >= $name) { 139 | array_push($filenames, ["fileName" => "$value", "fileData" => base64_encode(file_get_contents($logFilePath . "/" . $value))]); 140 | } 141 | } 142 | exit(json_encode(["Files" => $filenames])); 143 | } else { 144 | exit(json_encode(["State" => "NotFound"])); 145 | } 146 | } 147 | 148 | } 149 | -------------------------------------------------------------------------------- /Upload/protect.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | #./protect.sh / thinkShop reload 3 | #./protect.sh /app thinkShop setwaf 4 | #Config 5 | TargePath=$1 6 | TargeName=$2 7 | ProtectDataPath="/tmp/protect/${TargeName}/" 8 | ProtectWaf="$(pwd)/waf.php" 9 | 10 | function genWafCode(){ 11 | filePath=$1 12 | raw_code=$(cat ${filePath}) 13 | namespace=$(cat ${filePath} | grep "^namespace.*;") 14 | PHPWafCode="\"${ProtectDataPath}\",\"TargeName\"=>\"${TargeName}\",\"filePath\"=>\"${filePath}\"]; 18 | require(\"${ProtectWaf}\"); 19 | } catch (Exception \$e) { 20 | echo \$e->getMessage(); 21 | } 22 | ?>" 23 | echo "${PHPWafCode}" > ${filePath} 24 | echo "${raw_code}" >> ${filePath} 25 | } 26 | 27 | function backup(){ 28 | #Init 29 | mkdir -p ${ProtectDataPath} 30 | #SaveMysql 31 | mysqldump -u root -p --all-databases > ${ProtectDataPath}/db.sql 32 | #BackUpWeb 33 | tar -zcf ${ProtectDataPath}/wwwroot.tar.gz ${TargePath}/* 34 | } 35 | 36 | function reload(){ 37 | #ReloadFile 38 | tar -zxf ${ProtectDataPath}/wwwroot.tar.gz -C ${TargePath}/ 39 | #ReloadMysql 40 | mysql -u root -p < ${ProtectDataPath}/db.sql 41 | } 42 | 43 | function setwaf(){ 44 | chmod 777 -R ${ProtectDataPath} 45 | echo -e "Protect File" > ${ProtectDataPath}/Protect.log 46 | for line in $(find ${TargePath}/* -type f -name '*.php'); do 47 | echo -e "$line" >> ${ProtectDataPath}/Protect.log 48 | genWafCode $line 49 | done 50 | } 51 | 52 | case "$3" in 53 | 54 | backup ) 55 | echo "开始备份" 56 | backup 57 | echo "备份结束" 58 | ;; 59 | 60 | reload ) 61 | echo "开始恢复" 62 | reload 63 | echo "恢复结束" 64 | ;; 65 | 66 | setwaf ) 67 | echo "开始配置Waf" 68 | setwaf 69 | echo "配置Waf结束" 70 | ;; 71 | 72 | * ) 73 | echo "$0.sh filepath hostname [backup|reload|setwaf] " 74 | ;; 75 | 76 | esac -------------------------------------------------------------------------------- /Upload/waf.php: -------------------------------------------------------------------------------- 1 | 0: 43 | colorStr = "\033[35m[Warming] " 44 | if wafLogInfo["_BaseInfo"]["IsDanger"]: 45 | colorStr = "\033[31m[Danger] " 46 | print("\033[0;37m"+"-"*50) 47 | print(colorStr+"Host: %s Time:%s %s IP: %s\nMethod:%s FilePath: %s\nURL: %s\n%sGET: %s\nPost: %s\nCookie: %s" % ( 48 | wafLogInfo["_WafInfo"]["TargeName"], 49 | wafLogInfo["_BaseInfo"]["DateTime"], 50 | wafLogInfo["_BaseInfo"]["Time"], 51 | wafLogInfo["_BaseInfo"]["IP"], 52 | wafLogInfo["_SERVER"]["REQUEST_METHOD"], 53 | wafLogInfo["_SERVER"]["SCRIPT_FILENAME"], 54 | wafLogInfo["_BaseInfo"]["URL"], 55 | White, 56 | self._JsonShowFormart(wafLogInfo["_GET"]), 57 | self._JsonShowFormart(wafLogInfo["_POST"]), 58 | self._JsonShowFormart(wafLogInfo["_COOKIE"]), 59 | )) 60 | if len(wafLogInfo["_FilterAction"]) > 0: 61 | print("FilterAction:%s" % 62 | self._JsonShowFormart( 63 | wafLogInfo["_FilterAction"] 64 | )) 65 | pass 66 | 67 | def _UpdateLocalLogTime(self): 68 | filenames = os.listdir(self.logsPath) 69 | filenames.sort() 70 | print("\033[1;33m"+"-"*100) 71 | for file in filenames: 72 | if not os.path.isdir(file): 73 | time = float(Path(file).stem) 74 | if(time > self.SelfLastLogTime): 75 | self.SelfLastLogTime = time 76 | if os.path.getsize(self.logsPath+"/"+file) > 0: 77 | with open(self.logsPath+"/"+file, "r", encoding="UTF-8") as f: 78 | self._PrintLogToScreen(json_load(f)) 79 | else: 80 | print("\033[0;37m"+"-"*50) 81 | print("[]") 82 | print("\033[1;33m"+"-"*100) 83 | 84 | pass 85 | 86 | def UpdateLogFiles(self): 87 | self._UpdateLastLogTime() 88 | if(self.SelfLastLogTime < self.ServerLastLogTime): 89 | result = request("POST", self._targetUrl + 90 | "&WafAction=GetLogFiles", data={ 91 | "AfterTime": self.SelfLastLogTime, 92 | "BeforeTime": self.ServerLastLogTime, 93 | }).json() 94 | for fileData in result["Files"]: 95 | with open(self.logsPath+"/"+fileData["fileName"], "wb+") as f: 96 | f.write(b64decode(fileData["fileData"])) 97 | pass 98 | pass 99 | pass 100 | self._UpdateLocalLogTime() 101 | pass 102 | 103 | 104 | if __name__ == "__main__": 105 | 106 | if len(argv) < 4: 107 | print( 108 | "Usage:%s Gamebox1 http://172.17.0.2/ hRwNxiAPJaJIJUHUKbN3Q5awoMn90WQ6" % (argv[0])) 109 | sys.exit() 110 | cw = cellwaf(argv[1], argv[2], argv[3]) 111 | while True: 112 | cw.UpdateLogFiles() 113 | time.sleep(2) 114 | pass 115 | --------------------------------------------------------------------------------