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Ticket Resolution Summary Owner Reporter
#24 fixed mod-proxy test in gnutls_hooks.c inadequate; breaks localhost encryption Daniel Kahn Gillmor Peter Gamache

The following block of code in gnutls_hooks.c doesn't actually test for use by mod_proxy, but takes a shortcut (comparing IPs) that breaks local connectivity for processes running on the same host:

if (c->remote_addr->hostname || apr_strnatcmp(c->remote_ip,c->local_ip) == 0) {
/* Connection initiated by Apache (mod_proxy) => ignore */
         return OK;

These work fine when coming from other hosts but break if used on the same machine that's running Apache+gnutls:

# gnutls-cli-debug localhost
Resolving 'localhost'...
Connecting to ''...
Checking for SSL 3.0 support... no
Checking whether %COMPAT is required... yes
Checking for TLS 1.0 support... no
Checking for TLS 1.1 support... no
Checking fallback from TLS 1.1 to... failed
Checking for TLS 1.2 support... no
Checking whether we need to disable TLS 1.0... yes

Server does not support any of SSL 3.0, TLS 1.0 and TLS 1.1

# openssl s_client -connect localhost:443
140710953731744:error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol:s23_clnt.c:787:
no peer certificate available
No client certificate CA names sent
SSL handshake has read 7 bytes and written 305 bytes
New, (NONE), Cipher is (NONE)
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE

Guess what works though? A plaintext request on port 443:

# telnet localhost 443
Connected to localhost.
Escape character is '^]'.
<html><body text="#ffffff" bgcolor="#000000"><p><tt>It is pitch black.  You are likely to be eaten by a grue.<br />></tt></p></body></html>
Connection closed by foreign host.
#25 fixed Can't locate API module structure `ssl_module' Daniel Kahn Gillmor Christopher Dreher


i compiled the current git build (10. September 2014) for an older apache 2.2.3. when i now try to load the module i get the following error msg:

#:/usr/src/mod_gnutls# /etc/init.d/apache2 restart Forcing reload of web server (apache2)...apache2: Syntax error on line 185 of /etc/apache2/apache2.conf: Syntax error on line 4 of /etc/apache2/mods-enabled/gnutls.load: Can't locate API module structure `ssl_module' in file /usr/lib/apache2/modules/ /usr/lib/apache2/modules/ undefined symbol: ssl_module failed!

should it work with apache 2.2.3?

#29 fixed Disabling SSL3 and TLS1.0 don't work Daniel Kahn Gillmor Frederic Massot


I tried disabling SSL3 and TLS1.0 without success.

I put the same line "GnuTLSPriorities NORMAL:!VERS-SSL3.0:!VERS-TLS1.0:+VERS-TLS1.2:+VERS-TLS1.1:!MD5" in:

  • all virtual hosts that use HTTPS,
  • the configuration of GNUTLS (/etc/apache2/mods-available/gnutls.conf),
  • the default-tls file (/etc/apache2/sites-available/default-tls) which I do not use and that is not activated,
  • the apache2.conf file.

I restarted Apache. The result is always the same SSL3 and TLS 1.0 is still active.

There is a Debian bug report:


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