/mandos/release

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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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plugins.d/mandos-client.xml
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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-client">
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<!ENTITY TIMESTAMP "2013-10-20">
 
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<!ENTITY TIMESTAMP "2014-03-05">
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<!ENTITY % common SYSTEM "../common.ent">
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%common;
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]>
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      <year>2009</year>
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      <year>2012</year>
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      <year>2013</year>
 
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      <year>2014</year>
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      <holder>Teddy Hogeborn</holder>
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      <holder>Björn Påhlsson</holder>
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    </copyright>
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            assumed to separate the address from the port number.
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          </para>
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          <para>
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            This option is normally only useful for testing and
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            debugging.
 
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            Normally, Zeroconf would be used to locate Mandos servers,
 
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            in which case this option would only be used when testing
 
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            and debugging.
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          </para>
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        </listitem>
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      </varlistentry>
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          <para>
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            <replaceable>NAME</replaceable> can be the string
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            <quote><literal>none</literal></quote>; this will make
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            <command>&COMMANDNAME;</command> not bring up
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            <emphasis>any</emphasis> interfaces specified
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            <emphasis>after</emphasis> this string.  This is not
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            recommended, and only meant for advanced users.
 
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            <command>&COMMANDNAME;</command> only bring up interfaces
 
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            specified <emphasis>before</emphasis> this string.  This
 
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            is not recommended, and only meant for advanced users.
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          </para>
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        </listitem>
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      </varlistentry>