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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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mandos-options.xml
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    <emphasis>not</emphasis> run in debug mode.
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  </para>
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  <para id="priority">
 
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  <para id="priority_compat">
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    GnuTLS priority string for the <acronym>TLS</acronym> handshake.
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    The default is <quote><literal
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    >SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA</literal>
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    <literal>:+SIGN-DSA-SHA256</literal></quote>.
 
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    >SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:</literal>
 
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    <literal>+SIGN-RSA-RMD160</literal></quote>.
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    See <citerefentry><refentrytitle
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    >gnutls_priority_init</refentrytitle>
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    <manvolnum>3</manvolnum></citerefentry> for the syntax.
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    <emphasis>Warning</emphasis>: changing this may make the
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    <acronym>TLS</acronym> handshake fail, making server-client
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    communication impossible.  Changing this option may also make the
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    network traffic decryptable by an attacker.
 
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    communication impossible.
 
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  </para>
 
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  <para id="priority">
 
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    GnuTLS priority string for the <acronym>TLS</acronym> handshake.
 
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    The default is <quote><literal
 
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    >SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP</literal></quote>.  See
 
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    <citerefentry><refentrytitle >gnutls_priority_init</refentrytitle>
 
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    <manvolnum>3</manvolnum></citerefentry> for the syntax.
 
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    <emphasis>Warning</emphasis>: changing this may make the
 
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    <acronym>TLS</acronym> handshake fail, making server-client
 
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    communication impossible.
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  </para>
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  <para id="servicename">
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    implies this option.
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  </para>
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  <para id="zeroconf">
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    This option controls whether the server will announce its
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    existence using Zeroconf.  Default is to use Zeroconf.  If
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    Zeroconf is not used, a <option>port</option> number or a
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    <option>socket</option> is required.
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  </para>
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</section>