Windows security issue:v2.1.2

Fixed potential local privilege escalation vulnerability in
Windows service. The Windows service did not properly quote the
executable filename passed to CreateService.  A local attacker
with write access to the root directory C:\ could create an
executable that would be run with the same privilege level as
the OpenVPN Windows service.  However, since non-Administrative
users normally lack write permission on C:\, this vulnerability
is generally not exploitable except on older versions of Windows
(such as Win2K) where the default permissions on C:\ would allow
any user to create files there.
Credit:  Scott Laurie, MWR InfoSecurity

Version 2.1.2


git-svn-id: http://svn.openvpn.net/projects/openvpn/branches/BETA21/openvpn@6400 e7ae566f-a301-0410-adde-c780ea21d3b5

1 files changed, 111 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 4cbab1b..5580409 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,117 @@
 OpenVPN Change Log
 Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
 
+2010.08.09 -- Version 2.1.2
+
+* Windows security issue:
+  Fixed potential local privilege escalation vulnerability in
+  Windows service. The Windows service did not properly quote the
+  executable filename passed to CreateService.  A local attacker
+  with write access to the root directory C:\ could create an
+  executable that would be run with the same privilege level as
+  the OpenVPN Windows service.  However, since non-Administrative
+  users normally lack write permission on C:\, this vulnerability
+  is generally not exploitable except on older versions of Windows
+  (such as Win2K) where the default permissions on C:\ would allow
+  any user to create files there.
+  Credit:  Scott Laurie, MWR InfoSecurity
+
+* Added Python-based based alternative build system for Windows using
+  Visual Studio 2008 (in win directory).
+
+* When aborting in a non-graceful way, try to execute do_close_tun in
+  init.c prior to daemon exit to ensure that the tun/tap interface is
+  closed and any added routes are deleted.
+
+* Fixed an issue where AUTH_FAILED was not being properly delivered
+  to the client when a bad password is given for mid-session reauth,
+  causing the connection to fail without an error indication.
+
+* Don't advance to the next connection profile on AUTH_FAILED errors.
+
+* Fixed an issue in the Management Interface that could cause
+  a process hang with 100% CPU utilization in --management-client
+  mode if the management interface client disconnected at the
+  point where credentials are queried.
+
+* Fixed an issue where if reneg-sec was set to 0 on the client,
+  so that the server-side value would take precedence,
+  the auth_deferred_expire_window function would incorrectly
+  return a window period of 0 seconds.  In this case, the
+  correct window period should be the handshake window
+  period.
+
+* Modified ">PASSWORD:Verification Failed" management interface
+  notification to include a client reason string:
+
+    >PASSWORD:Verification Failed: 'AUTH_TYPE' ['REASON_STRING']
+
+* Enable exponential backoff in reliability layer
+  retransmits.
+
+* Set socket buffers (SO_SNDBUF and SO_RCVBUF) immediately after
+  socket is created rather than waiting until after connect/listen.
+
+* Management interface performance optimizations:
+
+  1. Added env-filter MI command to perform filtering on env vars
+     passed through as a part of --management-client-auth
+
+  2. man_write will now try to aggregate output into larger blocks
+     (up to 1024 bytes) for more efficient i/o
+
+* Fixed minor issue in Windows TAP driver DEBUG builds
+  where non-null-terminated unicode strings were being
+  printed incorrectly.
+
+* Fixed issue on Windows with MSVC compiler, where TCP_NODELAY support
+  was not being compiled in.
+
+* Proxy improvements:
+
+  Improved the ability of http-auth "auto" flag to dynamically detect
+  the auth method required by the proxy.
+
+  Added http-auth "auto-nct" flag to reject weak proxy auth methods.
+
+  Added HTTP proxy digest authentication method.
+
+  Removed extraneous openvpn_sleep calls from proxy.c.
+
+* Implemented http-proxy-override and http-proxy-fallback directives to make it
+  easier for OpenVPN client UIs to start a pre-existing client config file with
+  proxy options, or to adaptively fall back to a proxy connection if a direct
+  connection fails.
+
+* Implemented a key/value auth channel from client to server.
+
+* Fixed issue where bad creds provided by the management interface
+  for HTTP Proxy Basic Authentication would go into an infinite
+  retry-fail loop instead of requerying the management interface for
+  new creds.
+
+* Added support for MSVC debugging of openvpn.exe in settings.in:
+
+  # Build debugging version of openvpn.exe
+  !define PRODUCT_OPENVPN_DEBUG
+
+* Implemented multi-address DNS expansion on the network field of route
+  commands.
+
+  When only a single IP address is desired from a multi-address DNS
+  expansion, use the first address rather than a random selection.
+
+* Added --register-dns option for Windows.
+
+  Fixed some issues on Windows with --log, subprocess creation
+  for command execution, and stdout/stderr redirection.
+
+* Fixed an issue where application payload transmissions on the
+  TLS control channel (such as AUTH_FAILED) that occur during
+  or immediately after a TLS renegotiation might be dropped. 
+
+* Added warning about tls-remote option in man page.
+
 2009.12.11 -- Version 2.1.1
 
 * Fixed some breakage in openvpn.spec (which is required to build an