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  • Committer: Teddy Hogeborn
  • Date: 2014-06-08 03:10:08 UTC
  • mto: (237.7.272 trunk)
  • mto: This revision was merged to the branch mainline in revision 317.
  • Revision ID: teddy@recompile.se-20140608031008-mc9bd7b024a3q0y0
Address a very theoretical possible security issue in mandos-client.

If there were to run some sort of "cleaner" process for /run/tmp (or
/tmp), and mandos-client were to run for long enough for that cleaner
process to remove the temporary directory for GPGME, there was a
possibility that another unprivileged process could trick the (also
unprivileged) mandos-client process to remove other files or symlinks
which the unprivileged mandos-client process was allowed to remove.
This is not currently known to have been exploitable, since there are
no known initramfs environments running such cleaner processes.

* plugins.d/mandos-client.c (main): Use O_NOFOLLOW when opening
                                    tempdir for cleaning.

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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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        "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY COMMANDNAME "mandos-ctl">
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<!ENTITY TIMESTAMP "2012-01-01">
 
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<!ENTITY TIMESTAMP "2012-06-22">
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<!ENTITY % common SYSTEM "common.ent">
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%common;
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]>
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        <arg choice="plain"><option>-v</option></arg>
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      </group>
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    </cmdsynopsis>
 
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    <cmdsynopsis>
 
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      <command>&COMMANDNAME;</command>
 
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      <arg choice="plain"><option>--check</option></arg>
 
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    </cmdsynopsis>
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  </refsynopsisdiv>
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  <refsect1 id="description">
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        </listitem>
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      </varlistentry>
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      <varlistentry>
 
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        <term><option>--check</option></term>
 
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        <listitem>
 
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          <para>
 
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            Run self-tests.  This includes any unit tests, etc.
 
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          </para>
 
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        </listitem>
 
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      </varlistentry>
 
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    </variablelist>
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  </refsect1>
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