{"id":985,"date":"2026-11-12T23:35:43","date_gmt":"2026-11-12T15:35:43","guid":{"rendered":"https:\/\/btc354.com\/index.php\/2026\/11\/12\/pulsemate-security-95011724f6ac76586a0b104725fcef20a88eae700ec7f8882804028e94693f4e\/"},"modified":"2026-11-12T23:35:43","modified_gmt":"2026-11-12T15:35:43","slug":"pulsemate-security-95011724f6ac76586a0b104725fcef20a88eae700ec7f8882804028e94693f4e","status":"publish","type":"post","link":"https:\/\/btc354.com\/index.php\/2026\/11\/12\/pulsemate-security-95011724f6ac76586a0b104725fcef20a88eae700ec7f8882804028e94693f4e\/","title":{"rendered":"PostgreSQL dblink UAF \u6f0f\u6d1e\u6df1\u5ea6\u5256\u6790\uff1aCVE-2026-120147 \u91cd\u5165\u8c03\u7528\u94fe\u4e0e\u5e94\u6025\u52a0\u56fa\u5b9e\u6218"},"content":{"rendered":"<blockquote class=\"doc-lead\"><p><strong>\u5bfc\u8bed\uff1a<\/strong>PostgreSQL dblink UAF \u6f0f\u6d1e\uff08CVE-2026-120147\uff09\u662f\u4e00\u6b21\u5178\u578b\u7684\u201c\u5408\u6cd5\u529f\u80fd\u7ec4\u5408\u51fa\u975e\u6cd5\u5185\u5b58\u72b6\u6001\u201d\u7684\u5b89\u5168\u4e8b\u6545\u2014\u2014\u5b83\u4e0d\u9700\u8981\u6ea2\u51fa\u3001\u4e0d\u9700\u8981\u6ce8\u5165\uff0c\u53ea\u9700\u8981\u4e00\u4e2a\u5bf9\u8c61\u521b\u5efa\u8005\u3001\u4e00\u6b21\u7c7b\u578b\u8f6c\u6362\u3001\u4e00\u6b21\u91cd\u5165\u8c03\u7528\uff0c\u5c31\u80fd\u8ba9\u6570\u636e\u5e93\u8fdb\u7a0b\u5728\u91ca\u653e\u540e\u7684\u5806\u5185\u5b58\u4e0a\u7ee7\u7eed\u8bfb\u53d6\u7ed3\u679c\u96c6\uff0c\u6700\u7ec8\u4ee5 postgres \u7cfb\u7edf\u7528\u6237\u7684\u8eab\u4efd\u6267\u884c\u4efb\u610f\u4ee3\u7801\u3002CVSS 8.8\uff0c\u653b\u51fb\u5411\u91cf\u7f51\u7edc\u53ef\u8fbe\u3001\u590d\u6742\u5ea6\u4f4e\u3001\u65e0\u9700\u7528\u6237\u4ea4\u4e92\uff0c\u8fd9\u662f\u6bcf\u4e00\u4e2a\u8dd1\u7740 dblink \u7684\u751f\u4ea7\u5e93\u90fd\u5fc5\u987b\u5f53\u5929\u54cd\u5e94\u7684\u7ea7\u522b\u3002<\/p><\/blockquote>\n<div class=\"doc-spec-grid\">\n<div class=\"doc-spec-item\"><span class=\"doc-spec-label\">\ud83c\udfaf \u6838\u5fc3\u6280\u672f<\/span><span class=\"doc-spec-value\">PostgreSQL dblink \u6269\u5c55 \/ \u5185\u5b58\u751f\u547d\u5468\u671f\u7ba1\u7406<\/span><\/div>\n<div class=\"doc-spec-item\"><span class=\"doc-spec-label\">\u26a1 \u67b6\u6784\u96be\u5ea6<\/span><span class=\"doc-spec-value\">\u8d44\u6df1\u67b6\u6784\u7ea7 (Level 4)<\/span><\/div>\n<div class=\"doc-spec-item\"><span class=\"doc-spec-label\">\ud83d\udea8 \u98ce\u9669\u7b49\u7ea7<\/span><span class=\"doc-spec-value\">CVSS 8.8 High \/ \u53ef RCE<\/span><\/div>\n<\/div>\n<h2 class=\"doc-h2\">\u4e00\u3001PostgreSQL dblink UAF \u6f0f\u6d1e\u7684\u653b\u51fb\u9762\u5168\u666f<\/h2>\n<p class=\"doc-p\">\u5148\u628a\u7ed3\u8bba\u6446\u5728\u6700\u524d\u9762\uff1a\u8fd9\u4e0d\u662f\u4e00\u4e2a\u201c\u8fdc\u7a0b\u672a\u6388\u6743\u6253\u7a7f\u6570\u636e\u5e93\u201d\u7684\u6f0f\u6d1e\uff0c\u5b83\u7684\u524d\u7f6e\u6761\u4ef6\u662f<strong>\u653b\u51fb\u8005\u5177\u5907\u5728\u76ee\u6807\u5e93\u4e2d\u521b\u5efa\u5bf9\u8c61\uff08\u51fd\u6570\u3001\u7c7b\u578b\u3001\u8f6c\u6362\uff09\u7684\u6743\u9650<\/strong>\u3002\u5728\u5f88\u591a\u4e1a\u52a1\u5e93\u91cc\uff0c\u8fd9\u7b49\u540c\u4e8e\u201c\u4efb\u4f55\u80fd\u5efa\u8868\u7684\u5e94\u7528\u8d26\u53f7\u201d\u3002\u4e00\u65e6\u6ee1\u8db3\u8fd9\u4e2a\u6761\u4ef6\uff0c\u653b\u51fb\u8005\u5c31\u53ef\u4ee5\u6784\u9020\u4e00\u6761\u7cbe\u5fc3\u8bbe\u8ba1\u7684\u8c03\u7528\u94fe\uff0c\u8ba9 dblink \u5728\u8bfb\u53d6\u7ed3\u679c\u96c6\u7684\u8fc7\u7a0b\u4e2d\u88ab\u91cd\u5165\u5e76\u5173\u95ed\u8fde\u63a5\uff0c\u968f\u540e\u5916\u5c42\u8c03\u7528\u7ee7\u7eed\u8bbf\u95ee\u5df2\u7ecf\u91ca\u653e\u7684\u8fde\u63a5\u5bf9\u8c61\u2014\u2014\u8fd9\u5c31\u662f\u6807\u51c6\u7684 Use-After-Free\u3002<\/p>\n<p class=\"doc-p\">\u4ece CVSS \u5411\u91cf\u770b\uff1a<code>AV:N \/ AC:L \/ PR:L \/ UI:N \/ S:U \/ C:H \/ I:H \/ A:H<\/code>\u3002\u7f51\u7edc\u53ef\u8fbe\u3001\u590d\u6742\u5ea6\u4f4e\u3001\u4f4e\u6743\u9650\u5373\u53ef\u3001\u65e0\u9700\u4ea4\u4e92\uff0c\u673a\u5bc6\u6027\/\u5b8c\u6574\u6027\/\u53ef\u7528\u6027\u5168\u90e8\u9ad8\u5371\u3002\u7ffb\u8bd1\u6210\u8fd0\u7ef4\u8bed\u8a00\u5c31\u662f\uff1a<strong>\u53ea\u8981\u4f60\u7684\u5e93\u66b4\u9732\u5728\u7f51\u7edc\u4e0a\uff0c\u4e14\u4e1a\u52a1\u8d26\u53f7\u6709\u5efa\u5bf9\u8c61\u6743\u9650\uff0c\u8fd9\u4e2a\u6d1e\u5c31\u662f\u53ef\u6253\u7684\u3002<\/strong><\/p>\n<div class=\"doc-arch-card\">\n<div class=\"doc-arch-header\">\n<div class=\"doc-arch-title-wrap\">\n      <span class=\"doc-arch-title\"><span class=\"icon\">\ud83d\udcd0<\/span> PostgreSQL dblink UAF \u6f0f\u6d1e\u91cd\u5165\u89e6\u53d1\u94fe\u8def\u5168\u666f<\/span><br \/>\n      <span class=\"doc-arch-badge\">\u4f01\u4e1a\u7ea7\u67b6\u6784\u89c4\u8303<\/span>\n    <\/div>\n<div class=\"doc-arch-actions\">\n      <button type=\"button\" class=\"doc-arch-btn btn-copy-raw\">\ud83d\udccb \u590d\u5236\u6e90\u7801<\/button><br \/>\n      <button type=\"button\" class=\"doc-arch-btn btn-zoom-arch\">\ud83d\udd0d \u653e\u5927\u67e5\u770b<\/button>\n    <\/div>\n<\/p><\/div>\n<pre class=\"mermaid\">\nflowchart TD\n    subgraph \u653b\u51fb\u5165\u53e3\u5c42 [\"\u653b\u51fb\u5165\u53e3\u5c42 (Attacker Entry Tier)\"]\n        A[\"\u4f4e\u6743\u9650\u8d26\u53f7 (CREATE \u6743\u9650)\"] --&gt; B[\"\u6784\u9020\u6076\u610f\u7c7b\u578b\u8f6c\u6362\u51fd\u6570 (CAST \/ Type Conversion)\"]\n    end\n    subgraph \u5916\u5c42\u8c03\u7528\u5c42 [\"\u5916\u5c42 dblink \u8c03\u7528\u5c42 (Outer Call Tier)\"]\n        B --&gt; C[\"dblink() \u53d1\u8d77\u8fdc\u7a0b\u67e5\u8be2\u5e76\u6301\u6709\u8fde\u63a5\u53e5\u67c4\"]\n        C --&gt; D[\"\u9010\u884c\u8bfb\u53d6\u7ed3\u679c\u96c6 (Result Fetch Loop)\"]\n    end\n    subgraph \u91cd\u5165\u89e6\u53d1\u5c42 [\"\u91cd\u5165\u89e6\u53d1\u5c42 (Re-entrancy Tier)\"]\n        D --&gt; E[\"\u7ed3\u679c\u5217\u89e6\u53d1\u7c7b\u578b\u8f6c\u6362\u56de\u8c03\"]\n        E --&gt; F[\"\u56de\u8c03\u5185\u90e8\u518d\u6b21\u8fdb\u5165 dblink \u5e76 dblink_disconnect\"]\n    end\n    subgraph \u5185\u5b58\u7834\u574f\u5c42 [\"\u5185\u5b58\u7834\u574f\u5c42 (Memory Corruption Tier)\"]\n        F --&gt; G[\"\u8fde\u63a5\u5bf9\u8c61\u88ab\u91ca\u653e (free)\"]\n        D --&gt; H[\"\u5916\u5c42\u7ee7\u7eed\u8bfb\u53d6\u5df2\u91ca\u653e\u5185\u5b58 (use-after-free)\"]\n    end\n    subgraph \u5f71\u54cd\u5c42 [\"\u5f71\u54cd\u5c42 (Impact Tier)\"]\n        H --&gt; I[\"\u5806\u5185\u5b58\u5e03\u5c40\u64cd\u63a7 \/ \u51fd\u6570\u6307\u9488\u52ab\u6301\"]\n        I --&gt; J[\"\u4ee5 postgres \u7cfb\u7edf\u7528\u6237\u6267\u884c\u4efb\u610f\u4ee3\u7801\"]\n    end\n  <\/pre>\n<div class=\"doc-arch-caption\">\u56fe 1\uff1aPostgreSQL dblink UAF \u6f0f\u6d1e\u7684\u91cd\u5165\u89e6\u53d1\u94fe\u8def\uff0c\u4ece\u4f4e\u6743\u9650\u5efa\u5bf9\u8c61\u5230\u5916\u5c42\u8bfb\u53d6\u5df2\u91ca\u653e\u8fde\u63a5\uff0c\u6700\u7ec8\u5b8c\u6210\u4ee3\u7801\u6267\u884c\u3002<\/div>\n<\/div>\n<h2 class=\"doc-h2\">\u4e8c\u3001\u6839\u56e0\u62c6\u89e3\uff1a\u4e3a\u4ec0\u4e48\u201c\u91cd\u5165 + \u5173\u95ed\u8fde\u63a5\u201d\u4f1a\u53d8\u6210 UAF<\/h2>\n<h3 class=\"doc-h3\">2.1 dblink \u7684\u8fde\u63a5\u751f\u547d\u5468\u671f\u5047\u8bbe<\/h3>\n<p class=\"doc-p\">dblink \u6269\u5c55\u7684\u6838\u5fc3\u62bd\u8c61\u662f\u201c\u547d\u540d\u8fde\u63a5\u201d\uff1a<code>dblink_connect()<\/code> \u5efa\u7acb\u8fde\u63a5\u5e76\u6302\u5230\u4f1a\u8bdd\u7684\u8fde\u63a5\u54c8\u5e0c\u8868\u4e2d\uff0c<code>dblink()<\/code> \u53d1\u8d77\u67e5\u8be2\u5e76\u8fd4\u56de\u4e00\u4e2a\u7ed3\u679c\u6e38\u6807\uff0c\u8c03\u7528\u65b9\u901a\u8fc7 <code>dblink_fetch()<\/code> \u9010\u884c\u62c9\u53d6\u3002\u6574\u4e2a\u8bbe\u8ba1\u9690\u542b\u4e86\u4e00\u4e2a\u5173\u952e\u5047\u8bbe\uff1a<strong>\u5728\u4e00\u6b21 dblink \u8c03\u7528\u8bfb\u53d6\u7ed3\u679c\u96c6\u7684\u8fc7\u7a0b\u4e2d\uff0c\u5e95\u5c42\u8fde\u63a5\u5bf9\u8c61\u4e0d\u4f1a\u88ab\u5176\u4ed6\u8def\u5f84\u91ca\u653e<\/strong>\u3002<\/p>\n<p class=\"doc-p\">\u8fd9\u4e2a\u5047\u8bbe\u5728\u5355\u7ebf\u7a0b\u3001\u65e0\u56de\u8c03\u7684\u666e\u901a SQL \u6267\u884c\u8def\u5f84\u4e0b\u6210\u7acb\u3002\u4f46 PostgreSQL \u5141\u8bb8\u5728\u7c7b\u578b\u8f6c\u6362\uff08CAST\uff09\u4e2d\u6302\u8f7d\u7528\u6237\u81ea\u5b9a\u4e49\u51fd\u6570\uff0c\u800c\u7528\u6237\u81ea\u5b9a\u4e49\u51fd\u6570\u53ef\u4ee5\u6267\u884c\u4efb\u610f SQL\u2014\u2014\u5305\u62ec\u518d\u6b21\u8c03\u7528 dblink\u3002\u4e8e\u662f\u201c\u5916\u5c42\u6b63\u5728\u8bfb\u7ed3\u679c\u96c6\u201d\u4e0e\u201c\u5185\u5c42\u5173\u95ed\u8fde\u63a5\u201d\u8fd9\u4e24\u4e2a\u52a8\u4f5c\u53ef\u4ee5\u5728\u540c\u4e00\u4e2a\u8c03\u7528\u6808\u91cc\u540c\u65f6\u53d1\u751f\uff0c\u5047\u8bbe\u88ab\u6253\u7834\u3002<\/p>\n<h3 class=\"doc-h3\">2.2 \u91cd\u5165\u8def\u5f84\u7684\u7cbe\u786e\u65f6\u5e8f<\/h3>\n<p class=\"doc-p\">\u628a\u653b\u51fb\u94fe\u62c6\u6210\u65f6\u5e8f\uff0c\u95ee\u9898\u5c31\u975e\u5e38\u6e05\u6670\u4e86\uff1a<\/p>\n<ul class=\"doc-list\">\n<li><strong>\u6b65\u9aa4 1\uff1a<\/strong>\u653b\u51fb\u8005\u521b\u5efa\u81ea\u5b9a\u4e49\u7c7b\u578b\u8f6c\u6362\u51fd\u6570 <code>evil_cast(text) RETURNS int<\/code>\uff0c\u51fd\u6570\u4f53\u5185\u8c03\u7528 <code>dblink_disconnect('victim_conn')<\/code>\u3002<\/li>\n<li><strong>\u6b65\u9aa4 2\uff1a<\/strong>\u653b\u51fb\u8005\u53d1\u8d77 <code>SELECT * FROM dblink('victim_conn', 'SELECT ...') AS t(c int)<\/code>\uff0c\u5916\u5c42\u8c03\u7528\u6301\u6709\u8fde\u63a5\u53e5\u67c4\u5e76\u5f00\u59cb\u9010\u884c\u8bfb\u53d6\u3002<\/li>\n<li><strong>\u6b65\u9aa4 3\uff1a<\/strong>\u7ed3\u679c\u96c6\u67d0\u4e00\u5217\u5728\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\u524d\u89e6\u53d1\u7c7b\u578b\u8f6c\u6362\uff0c\u8fdb\u5165 <code>evil_cast<\/code>\u3002<\/li>\n<li><strong>\u6b65\u9aa4 4\uff1a<\/strong><code>evil_cast<\/code> \u5185\u90e8\u8c03\u7528 <code>dblink_disconnect<\/code>\uff0c\u8fde\u63a5\u5bf9\u8c61\u88ab <code>free<\/code>\uff0c\u4f46\u5916\u5c42\u6e38\u6807\u4ecd\u6301\u6709\u6307\u5411\u8be5\u5bf9\u8c61\u7684\u6307\u9488\u3002<\/li>\n<li><strong>\u6b65\u9aa4 5\uff1a<\/strong>\u5916\u5c42\u7ee7\u7eed <code>dblink_fetch<\/code>\uff0c\u8bfb\u53d6\u5df2\u91ca\u653e\u5185\u5b58\uff0c\u89e6\u53d1 UAF\u3002<\/li>\n<\/ul>\n<div class=\"doc-callout doc-callout-danger\">\n<div class=\"doc-callout-title\">\ud83d\udea8 \u4e25\u91cd\u9690\u60a3\u544a\u8b66<\/div>\n<p>UAF \u672c\u8eab\u53ea\u662f\u201c\u8bfb\u5df2\u91ca\u653e\u5185\u5b58\u201d\uff0c\u4f46 PostgreSQL \u7684\u5806\u5206\u914d\u5668\uff08palloc \/ aset\uff09\u5728\u8fde\u63a5\u5bf9\u8c61\u91ca\u653e\u540e\uff0c\u653b\u51fb\u8005\u53ef\u4ee5\u901a\u8fc7\u540e\u7eed\u7684 SQL \u6267\u884c\u7cbe\u786e\u63a7\u5236\u5806\u5e03\u5c40\uff0c\u628a\u5df2\u91ca\u653e\u7684\u8fde\u63a5\u5bf9\u8c61\u5185\u5b58\u91cd\u586b\u4e3a\u53ef\u63a7\u5185\u5bb9\uff0c\u4ece\u800c\u52ab\u6301\u51fd\u6570\u6307\u9488\u6216\u56de\u8c03\u7ed3\u6784\uff0c\u5b8c\u6210\u4ece UAF \u5230 RCE \u7684\u8de8\u8d8a\u3002\u8fd9\u5c31\u662f CVSS \u7ed9\u51fa C:H\/I:H\/A:H \u7684\u539f\u56e0\u3002<\/p><\/div>\n<h2 class=\"doc-h2\">\u4e09\u3001\u5f71\u54cd\u7248\u672c\u77e9\u9635\u4e0e\u4fee\u590d\u7248\u672c\u5bf9\u7167<\/h2>\n<p class=\"doc-p\">\u5b98\u65b9\u5728 2026 \u5e74 11 \u6708\u540c\u6b65\u53d1\u5e03\u4e86\u4e94\u6761\u7ef4\u62a4\u7ebf\u7684\u4fee\u590d\u7248\u672c\u3002\u6ce8\u610f\uff1a<strong>\u8fd9\u4e0d\u662f\u4e00\u4e2a\u201c\u53ea\u5f71\u54cd\u6700\u65b0\u7248\u201d\u7684\u6d1e\uff0c14 \u5230 18 \u5168\u7ebf\u4e2d\u62db<\/strong>\uff0c\u5f88\u591a\u8fd8\u5728\u8dd1 14\/15 \u7684\u8001\u5e93\u540c\u6837\u9700\u8981\u5347\u7ea7\u3002<\/p>\n<div class=\"doc-table-wrapper\">\n<table class=\"doc-table\">\n<thead>\n<tr>\n<th>\u7ef4\u62a4\u7ebf<\/th>\n<th>\u53d7\u5f71\u54cd\u7248\u672c<\/th>\n<th>\u4fee\u590d\u7248\u672c<\/th>\n<th>\u5347\u7ea7\u7d27\u8feb\u5ea6<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>PostgreSQL 18<\/td>\n<td>&lt; 18.7<\/td>\n<td>18.7<\/td>\n<td><span class=\"badge-tag-green\">\u7acb\u5373\u5347\u7ea7<\/span><\/td>\n<\/tr>\n<tr>\n<td>PostgreSQL 17<\/td>\n<td>&lt; 17.12<\/td>\n<td>17.12<\/td>\n<td><span class=\"badge-tag-green\">\u7acb\u5373\u5347\u7ea7<\/span><\/td>\n<\/tr>\n<tr>\n<td>PostgreSQL 16<\/td>\n<td>&lt; 16.16<\/td>\n<td>16.16<\/td>\n<td><span class=\"badge-tag-green\">\u7acb\u5373\u5347\u7ea7<\/span><\/td>\n<\/tr>\n<tr>\n<td>PostgreSQL 15<\/td>\n<td>&lt; 15.20<\/td>\n<td>15.20<\/td>\n<td><span class=\"badge-tag-green\">\u7acb\u5373\u5347\u7ea7<\/span><\/td>\n<\/tr>\n<tr>\n<td>PostgreSQL 14<\/td>\n<td>&lt; 14.25<\/td>\n<td>14.25<\/td>\n<td><span class=\"badge-tag-green\">\u7acb\u5373\u5347\u7ea7<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<div class=\"doc-callout doc-callout-warning\">\n<div class=\"doc-callout-title\">\u26a0\ufe0f \u751f\u4ea7\u907f\u5751\u98ce\u9669<\/div>\n<p>PostgreSQL 14 \u5df2\u63a5\u8fd1\u793e\u533a EOL \u7a97\u53e3\uff0c\u90e8\u5206\u53d1\u884c\u7248\u4ed3\u5e93\u53ef\u80fd\u4e0d\u4f1a\u53ca\u65f6\u8ddf\u8fdb 14.25 \u7684\u6253\u5305\u3002\u5982\u679c\u4f60\u7684\u5e93\u8fd8\u5728 14 \u4e0a\uff0c\u8bf7\u4f18\u5148\u8bc4\u4f30\u5347\u7ea7\u5230 16\/17 \u7684\u8fc1\u79fb\u8def\u5f84\uff0c\u800c\u4e0d\u662f\u957f\u671f\u505c\u7559\u5728 14.25 \u6253\u8865\u4e01\u2014\u2014\u8865\u4e01\u80fd\u5835\u8fd9\u4e2a\u6d1e\uff0c\u5835\u4e0d\u4f4f\u4e0b\u4e00\u4e2a\u3002<\/p><\/div>\n<h2 class=\"doc-h2\">\u56db\u3001\u5e94\u6025\u54cd\u5e94\uff1a\u4ece\u68c0\u6d4b\u5230\u52a0\u56fa\u7684\u56db\u6b65\u843d\u5730<\/h2>\n<h3 class=\"doc-h3\">4.1 \u7b2c\u4e00\u6b65\uff1a\u786e\u8ba4 dblink \u662f\u5426\u5728\u7528\u3001\u8c01\u5728\u7528<\/h3>\n<p class=\"doc-p\">\u5f88\u591a\u56e2\u961f\u5176\u5b9e\u5e76\u4e0d\u6e05\u695a\u81ea\u5df1\u7684\u5e93\u91cc\u6709\u6ca1\u6709\u88c5 dblink\u3002\u5148\u67e5\u6269\u5c55\uff0c\u518d\u67e5\u6743\u9650\uff0c\u6700\u540e\u67e5\u8fde\u63a5\u914d\u7f6e\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\" data-enlighter-title=\"dblink \u66b4\u9732\u9762\u6392\u67e5.sql\">-- 1. \u786e\u8ba4 dblink \u6269\u5c55\u662f\u5426\u5b89\u88c5\nSELECT extname, extversion, extnamespace::regnamespace\nFROM pg_extension\nWHERE extname = 'dblink';\n\n-- 2. \u5217\u51fa\u6240\u6709\u975e\u8d85\u7ea7\u7528\u6237\u4f46\u62e5\u6709 CREATE \u6743\u9650\u7684\u89d2\u8272\nSELECT r.rolname, n.nspname\nFROM pg_roles r\nJOIN pg_namespace n ON true\nWHERE NOT r.rolsuper\n  AND has_schema_privilege(r.rolname, n.oid, 'CREATE')\n  AND n.nspname NOT IN ('pg_catalog', 'information_schema')\nORDER BY r.rolname;\n\n-- 3. \u68c0\u67e5\u662f\u5426\u5b58\u5728\u53ef\u7591\u7684\u81ea\u5b9a\u4e49 CAST \u4e0e\u51fd\u6570\nSELECT castsource::regtype, casttarget::regtype, castfunc::regproc\nFROM pg_cast\nWHERE castfunc  0\n  AND castsource::regtype::text NOT LIKE 'pg_%';<\/pre>\n<h3 class=\"doc-h3\">4.2 \u7b2c\u4e8c\u6b65\uff1a\u4e34\u65f6\u7f13\u89e3\uff08\u65e0\u6cd5\u7acb\u5373\u5347\u7ea7\u65f6\uff09<\/h3>\n<p class=\"doc-p\">\u5982\u679c\u751f\u4ea7\u5e93\u56e0\u4e3a\u4e1a\u52a1\u8026\u5408\u65e0\u6cd5\u5f53\u5929\u5347\u7ea7\uff0c\u53ef\u4ee5\u5148\u7528\u201c\u6700\u5c0f\u6743\u9650 + \u6269\u5c55\u9694\u79bb\u201d\u628a\u653b\u51fb\u9762\u538b\u5230\u6700\u4f4e\u3002\u6838\u5fc3\u601d\u8def\u662f\uff1a<strong>\u4e0d\u8ba9\u666e\u901a\u4e1a\u52a1\u8d26\u53f7\u62e5\u6709\u521b\u5efa CAST \/ \u51fd\u6570\u7684\u6743\u9650\uff0cdblink \u53ea\u7ed9\u53d7\u63a7\u8d26\u53f7\u4f7f\u7528<\/strong>\u3002<\/p>\n<div class=\"baota-config-bar\"><span>REVOKE CREATE ON SCHEMA public FROM PUBLIC;<\/span><span class=\"lang-tag\">SQL<\/span><\/div>\n<div class=\"baota-config-bar\"><span>REVOKE EXECUTE ON FUNCTION dblink_disconnect(text) FROM PUBLIC;<\/span><span class=\"lang-tag\">SQL<\/span><\/div>\n<details class=\"doc-accordion\">\n<summary>\u70b9\u51fb\u5c55\u5f00\uff1a\u4e34\u65f6\u7f13\u89e3\u5b8c\u6574 SQL \u811a\u672c\u4e0e\u56de\u6eda\u65b9\u6848<\/summary>\n<div class=\"doc-accordion-content\">\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\" data-enlighter-title=\"dblink_uaf_mitigation.sql\">-- \u4e34\u65f6\u7f13\u89e3\uff1a\u6536\u56de public schema \u7684\u5efa\u5bf9\u8c61\u6743\u9650\nREVOKE CREATE ON SCHEMA public FROM PUBLIC;\n\n-- \u4ec5\u5141\u8bb8\u53d7\u63a7\u89d2\u8272\u521b\u5efa\u51fd\u6570\u4e0e\u7c7b\u578b\nREVOKE CREATE ON SCHEMA public FROM app_rw;\nGRANT CREATE ON SCHEMA app_trusted TO dblink_owner;\n\n-- \u6536\u56de dblink \u65ad\u5f00\u8fde\u63a5\u7684\u516c\u5171\u6267\u884c\u6743\u9650\nREVOKE EXECUTE ON FUNCTION dblink_disconnect(text) FROM PUBLIC;\nGRANT EXECUTE ON FUNCTION dblink_disconnect(text) TO dblink_owner;\n\n-- \u5ba1\u8ba1\uff1a\u8bb0\u5f55\u6240\u6709 dblink \u8c03\u7528\uff08\u9700\u914d\u5408 pgaudit\uff09\nALTER SYSTEM SET pgaudit.log = 'function,ddl';\nSELECT pg_reload_conf();\n\n-- \u56de\u6eda\u65b9\u6848\uff08\u786e\u8ba4\u5347\u7ea7\u5b8c\u6210\u540e\u6267\u884c\uff09\n-- GRANT CREATE ON SCHEMA public TO PUBLIC;\n-- GRANT EXECUTE ON FUNCTION dblink_disconnect(text) TO PUBLIC;<\/pre>\n<\/div>\n<\/details>\n<h3 class=\"doc-h3\">4.3 \u7b2c\u4e09\u6b65\uff1a\u5347\u7ea7\u6267\u884c<\/h3>\n<p class=\"doc-p\">\u5c0f\u7248\u672c\u5347\u7ea7\uff08\u5982 16.15 \u2192 16.16\uff09\u901a\u5e38\u53ea\u9700\u66ff\u6362\u4e8c\u8fdb\u5236\u5e76\u91cd\u542f\uff0c\u4e0d\u9700\u8981 initdb\u3002\u4f46\u751f\u4ea7\u73af\u5883\u8bf7\u52a1\u5fc5\u5148\u5728\u4ece\u5e93\u6216\u9884\u53d1\u73af\u5883\u9a8c\u8bc1\u6269\u5c55\u517c\u5bb9\u6027\uff0c\u5c24\u5176\u662f dblink\u3001postgis \u8fd9\u7c7b\u5e26 C \u4ee3\u7801\u7684\u6269\u5c55\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"bash\" data-enlighter-title=\"PostgreSQL \u5c0f\u7248\u672c\u5347\u7ea7\u6d41\u7a0b.sh\"># 1. \u5907\u4efd\uff08\u903b\u8f91 + \u7269\u7406\u53cc\u4fdd\u9669\uff09\npd_dump -Fc -f \/backup\/pre_upgrade.dump your_db\npg_basebackup -D \/backup\/base -Ft -z -P\n\n# 2. \u505c\u6b62\u670d\u52a1\nsystemctl stop postgresql-16\n\n# 3. \u5b89\u88c5\u4fee\u590d\u7248\u672c\uff08\u4ee5 Debian\/Ubuntu PGDG \u6e90\u4e3a\u4f8b\uff09\napt-get update\napt-get install -y postgresql-16=16.16-1.pgdg120+1\n\n# 4. \u542f\u52a8\u5e76\u9a8c\u8bc1\nsystemctl start postgresql-16\npsql -c \"SELECT version();\"\npsql -c \"SELECT extname, extversion FROM pg_extension WHERE extname='dblink';\"<\/pre>\n<h3 class=\"doc-h3\">4.4 \u7b2c\u56db\u6b65\uff1a\u957f\u671f\u52a0\u56fa<\/h3>\n<ul class=\"doc-list\">\n<li><strong>\u6743\u9650\u6700\u5c0f\u5316\uff1a<\/strong>\u4e1a\u52a1\u8d26\u53f7\u9ed8\u8ba4\u4e0d\u6388\u4e88 CREATE \u6743\u9650\uff0c\u5efa\u5bf9\u8c61\u8d70\u72ec\u7acb\u7684 migration \u8d26\u53f7\u3002<\/li>\n<li><strong>\u6269\u5c55\u767d\u540d\u5355\uff1a<\/strong>\u751f\u4ea7\u5e93\u53ea\u5141\u8bb8\u5b89\u88c5\u7ecf\u8fc7\u5b89\u5168\u8bc4\u5ba1\u7684\u6269\u5c55\uff0cdblink \u80fd\u7528 postgres_fdw \u66ff\u4ee3\u7684\u4f18\u5148\u66ff\u4ee3\u3002<\/li>\n<li><strong>\u5ba1\u8ba1\u5e38\u6001\u5316\uff1a<\/strong>\u5f00\u542f pgaudit\uff0c\u5bf9 <code>CREATE CAST<\/code>\u3001<code>CREATE FUNCTION<\/code>\u3001<code>dblink_disconnect<\/code> \u505a\u91cd\u70b9\u544a\u8b66\u3002<\/li>\n<li><strong>\u7248\u672c\u8282\u594f\uff1a<\/strong>\u628a PostgreSQL \u5c0f\u7248\u672c\u5347\u7ea7\u7eb3\u5165\u6708\u5ea6\u4f8b\u884c\u7a97\u53e3\uff0c\u800c\u4e0d\u662f\u7b49 CVE \u51fa\u6765\u518d\u6551\u706b\u3002<\/li>\n<\/ul>\n<div class=\"doc-callout doc-callout-info\">\n<div class=\"doc-callout-title\">\ud83d\udca1 \u67b6\u6784\u6838\u5fc3\u51b3\u7b56<\/div>\n<p>\u5982\u679c\u4f60\u7684\u7cfb\u7edf\u5927\u91cf\u4f9d\u8d56 dblink \u505a\u8de8\u5e93\u67e5\u8be2\uff0c\u5efa\u8bae\u501f\u8fd9\u6b21\u6f0f\u6d1e\u505a\u4e00\u6b21\u67b6\u6784\u8bc4\u4f30\uff1apostgres_fdw \u5728\u8fde\u63a5\u7ba1\u7406\u3001\u4e8b\u52a1\u8bed\u4e49\u548c\u6743\u9650\u6a21\u578b\u4e0a\u90fd\u66f4\u73b0\u4ee3\uff0c\u4e14\u4e0d\u66b4\u9732 dblink_disconnect \u8fd9\u7c7b\u53ef\u88ab\u91cd\u5165\u5229\u7528\u7684\u63a5\u53e3\u3002\u628a dblink \u9010\u6b65\u8fc1\u79fb\u5230 postgres_fdw\uff0c\u662f\u6bd4\u201c\u6253\u8865\u4e01\u201d\u66f4\u5f7b\u5e95\u7684\u89e3\u6cd5\u3002<\/p><\/div>\n<h2 class=\"doc-h2\">\u4e94\u3001\u4ece\u8fd9\u6b21 PostgreSQL dblink UAF \u6f0f\u6d1e\u80fd\u5b66\u5230\u4ec0\u4e48<\/h2>\n<p class=\"doc-p\">CVE-2026-120147 \u7ed9\u6240\u6709\u6570\u636e\u5e93\u5185\u6838\u4e0e\u6269\u5c55\u5f00\u53d1\u8005\u4e0a\u4e86\u4e00\u8bfe\uff1a<strong>\u4efb\u4f55\u201c\u6301\u6709\u8d44\u6e90\u53e5\u67c4 + \u5141\u8bb8\u56de\u8c03\u201d\u7684 API \u8bbe\u8ba1\uff0c\u90fd\u5fc5\u987b\u663e\u5f0f\u8003\u8651\u91cd\u5165<\/strong>\u3002dblink \u7684\u8fde\u63a5\u5bf9\u8c61\u6ca1\u6709\u5f15\u7528\u8ba1\u6570\uff0c\u6ca1\u6709\u201c\u6b63\u5728\u4f7f\u7528\u201d\u6807\u8bb0\uff0c\u4e5f\u6ca1\u6709\u5728 disconnect \u65f6\u68c0\u67e5\u662f\u5426\u6709\u6d3b\u8dc3\u6e38\u6807\u2014\u2014\u8fd9\u4e09\u4e2a\u7f3a\u5931\u4e2d\u7684\u4efb\u4f55\u4e00\u4e2a\u88ab\u8865\u4e0a\uff0c\u8fd9\u4e2a\u6d1e\u90fd\u4e0d\u4f1a\u6210\u7acb\u3002<\/p>\n<p class=\"doc-p\">\u5bf9\u67b6\u6784\u5e08\u800c\u8a00\uff0c\u66f4\u503c\u5f97\u8bb0\u4f4f\u7684\u662f\u653b\u51fb\u9762\u7684\u7ec4\u5408\u6027\uff1a\u5355\u72ec\u770b\u201c\u7c7b\u578b\u8f6c\u6362\u201d\u662f\u5b89\u5168\u7684\uff0c\u5355\u72ec\u770b\u201cdblink_disconnect\u201d\u662f\u5b89\u5168\u7684\uff0c\u5355\u72ec\u770b\u201c\u4f4e\u6743\u9650\u5efa\u5bf9\u8c61\u201d\u5728\u5f88\u591a\u56e2\u961f\u773c\u91cc\u4e5f\u662f\u53ef\u63a5\u53d7\u7684\u2014\u2014\u4f46\u4e09\u8005\u7ec4\u5408\u8d77\u6765\u5c31\u662f\u4e00\u4e2a CVSS 8.8 \u7684 RCE\u3002\u5b89\u5168\u8bc4\u5ba1\u4e0d\u80fd\u53ea\u770b\u5355\u70b9\uff0c\u8981\u770b\u8c03\u7528\u94fe\u3002<\/p>\n<div class=\"doc-callout doc-callout-related\">\n<div class=\"doc-callout-title\">\ud83d\udd17 \u5ef6\u4f38\u9605\u8bfb\u4e0e\u4e13\u680f\u63a8\u8350<\/div>\n<ul class=\"doc-internal-links\">\n<li><strong>\u6240\u5c5e\u4e13\u680f\uff1a<\/strong><a href=\"https:\/\/btc354.com\/index.php\/category\/security\/\">\u6d4f\u89c8\u66f4\u591a\u3010\u5b89\u5168\u6f0f\u6d1e\u3011\u6280\u672f\u67b6\u6784\u4e0e\u5de5\u7a0b\u5b9e\u6218\u6587\u7ae0<\/a><\/li>\n<li><strong>\u63a8\u8350\u6df1\u5ea6\u9605\u8bfb\uff1a<\/strong><a href=\"https:\/\/btc354.com\/index.php\/2026\/11\/12\/pulsemate-security-f66d6fec14e7c27d5c53ad4ae54c242d4d37a694ab20c6d2678034779770fb1d\/\">Grafana \u8d8a\u6743\u6f0f\u6d1e\u6df1\u5ea6\u590d\u76d8\uff1aGit Sync \u4ed3\u5e93\u6587\u4ef6 API \u7ed5\u8fc7\u6587\u4ef6\u5939\u6743\u9650\u7684\u6388\u6743\u7f3a\u9677\u4e0e\u5e94\u6025\u52a0\u56fa<\/a><\/li>\n<li><strong>\u63a8\u8350\u6df1\u5ea6\u9605\u8bfb\uff1a<\/strong><a href=\"https:\/\/btc354.com\/index.php\/2026\/11\/12\/pulsemate-security-809e6a0a13e95ae56016d3a06253ac04c91a8502671f13eca675311b6046aaf8\/\">WordPress \u6743\u9650\u63d0\u5347\u6f0f\u6d1e\u6df1\u5ea6\u5e94\u6025\u54cd\u5e94\uff1aVibeBP 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(PostgreSQL Security Information)<\/a>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u3010PostgreSQL dblink UAF \u6f0f\u6d1e\u3011\u6df1\u5ea6\u5256\u6790 PostgreSQL dblink \u6269\u5c55 CVE-2026-120147 \u9ad8\u5371 UAF \u6f0f\u6d1e\uff1aCVSS 8.8\uff0c\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u7c7b\u578b\u8f6c\u6362\u91cd\u5165 dblink 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