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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:15:05 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:15:05 +0000 |
| commit | 46651ce6fe013220ed397add242004d764fc0153 (patch) | |
| tree | 6e5299f990f88e60174a1d3ae6e48eedd2688b2b /doc/src/sgml/html/contrib-dblink-connect-u.html | |
| parent | Initial commit. (diff) | |
| download | postgresql-14-upstream.tar.xz postgresql-14-upstream.zip | |
Adding upstream version 14.5.upstream/14.5upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
| -rw-r--r-- | doc/src/sgml/html/contrib-dblink-connect-u.html | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/doc/src/sgml/html/contrib-dblink-connect-u.html b/doc/src/sgml/html/contrib-dblink-connect-u.html new file mode 100644 index 0000000..948e0fe --- /dev/null +++ b/doc/src/sgml/html/contrib-dblink-connect-u.html @@ -0,0 +1,29 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>dblink_connect_u</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="prev" href="contrib-dblink-connect.html" title="dblink_connect" /><link rel="next" href="contrib-dblink-disconnect.html" title="dblink_disconnect" /></head><body id="docContent" class="container-fluid col-10"><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">dblink_connect_u</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="contrib-dblink-connect.html" title="dblink_connect">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="dblink.html" title="F.10. dblink">Up</a></td><th width="60%" align="center">F.10. dblink</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 14.5 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="contrib-dblink-disconnect.html" title="dblink_disconnect">Next</a></td></tr></table><hr></hr></div><div class="refentry" id="CONTRIB-DBLINK-CONNECT-U"><div class="titlepage"></div><a id="id-1.11.7.19.6.1" class="indexterm"></a><div class="refnamediv"><h2><span class="refentrytitle">dblink_connect_u</span></h2><p>dblink_connect_u — opens a persistent connection to a remote database, insecurely</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="synopsis"> +dblink_connect_u(text connstr) returns text +dblink_connect_u(text connname, text connstr) returns text +</pre></div><div class="refsect1" id="id-1.11.7.19.6.5"><h2>Description</h2><p> + <code class="function">dblink_connect_u()</code> is identical to + <code class="function">dblink_connect()</code>, except that it will allow non-superusers + to connect using any authentication method. + </p><p> + If the remote server selects an authentication method that does not + involve a password, then impersonation and subsequent escalation of + privileges can occur, because the session will appear to have + originated from the user as which the local <span class="productname">PostgreSQL</span> + server runs. Also, even if the remote server does demand a password, + it is possible for the password to be supplied from the server + environment, such as a <code class="filename">~/.pgpass</code> file belonging to the + server's user. This opens not only a risk of impersonation, but the + possibility of exposing a password to an untrustworthy remote server. + Therefore, <code class="function">dblink_connect_u()</code> is initially + installed with all privileges revoked from <code class="literal">PUBLIC</code>, + making it un-callable except by superusers. In some situations + it may be appropriate to grant <code class="literal">EXECUTE</code> permission for + <code class="function">dblink_connect_u()</code> to specific users who are considered + trustworthy, but this should be done with care. It is also recommended + that any <code class="filename">~/.pgpass</code> file belonging to the server's user + <span class="emphasis"><em>not</em></span> contain any records specifying a wildcard host name. + </p><p> + For further details see <code class="function">dblink_connect()</code>. + </p></div></div><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navfooter"><hr></hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="contrib-dblink-connect.html" title="dblink_connect">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="dblink.html" title="F.10. dblink">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="contrib-dblink-disconnect.html" title="dblink_disconnect">Next</a></td></tr><tr><td width="40%" align="left" valign="top">dblink_connect </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 14.5 Documentation">Home</a></td><td width="40%" align="right" valign="top"> dblink_disconnect</td></tr></table></div></body></html>
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