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Document the idea of creating a symbolic link in /tmp to prevent server

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spoofing when the socket file has been moved.
This commit is contained in:
Bruce Momjian 2008-01-31 17:22:43 +00:00
parent 7ae43187ee
commit 8e9c7fe982
1 changed files with 11 additions and 2 deletions
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13
doc/src/sgml/runtime.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/runtime.sgml,v 1.403 2008/01/24 06:23:32 petere Exp $ --> <!-- $PostgreSQL: pgsql/doc/src/sgml/runtime.sgml,v 1.404 2008/01/31 17:22:43 momjian Exp $ -->
<chapter Id="runtime"> <chapter Id="runtime">
<title>Operating System Environment</title> <title>Operating System Environment</title>
@ -1397,7 +1397,16 @@ $ <userinput>kill -INT `head -1 /usr/local/pgsql/data/postmaster.pid`</userinput
connections is to use a Unix domain socket directory (<xref connections is to use a Unix domain socket directory (<xref
linkend="guc-unix-socket-directory">) that has write permission only linkend="guc-unix-socket-directory">) that has write permission only
for a trusted local user. This prevents a malicious user from creating for a trusted local user. This prevents a malicious user from creating
their own socket file in that directory. For TCP connections the server their own socket file in that directory. If you are concerned that
some applications might still look in <filename>/tmp</> for the
socket file and hence be vulnerable to spoofing, create a symbolic link
during operating system startup in <filename>/tmp</> that points to
the relocated socket file. You also might need to modify your
<filename>/tmp</> cleanup script to preserve the symbolic link.
</para>
<para>
For TCP connections the server
must accept only <literal>hostssl</> connections (<xref must accept only <literal>hostssl</> connections (<xref
linkend="auth-pg-hba-conf">) and have SSL linkend="auth-pg-hba-conf">) and have SSL
<filename>server.key</filename> (key) and <filename>server.key</filename> (key) and