The first process in Windows is usually [System Process] which has no
associated path, arch, or user, causing this code to skip all those
columns. Check for nil instead of blank to get around it. Need to
revisit this and make nonsense columns nil instead of an empty-string.
Just added and commented. It'd be nice to have a real spot for this kind
of credit, because it comes up a lot and it's hard to parse out in a
machine way who 'wrote' the module and who came up with the exploit.
commit 6a3ad1d887df9d277e4878de94f8700ed8e404f9
Author: James Lee <egypt@metasploit.com>
Date: Wed May 9 16:22:49 2012 -0600
Add register_command calls for md5 and sha1
commit dbd52c5a1edfe1818a580d4d46aac0a9ca038e9c
Author: James Lee <egypt@metasploit.com>
Date: Wed May 9 16:22:09 2012 -0600
Read the file instead of downloading it
commit 55b84ad8e2a8532b3f8520ccb1162169b8e9c056
Author: James Lee <egypt@metasploit.com>
Date: Wed May 9 15:27:11 2012 -0600
Re-compile linux meterp to support the loadlib api
commit d112e84e490aa30aa9533fb0bdb33a9713ce01a5
Author: James Lee <egypt@metasploit.com>
Date: Wed May 9 14:50:25 2012 -0600
Re-compile java meterp to support the loadlib api
commit c137187b346b708487245a849b95343223e4e7b0
Author: James Lee <egypt@metasploit.com>
Date: Wed May 9 14:44:10 2012 -0600
Don't try to get interfaces if this session doesn't implement it
commit 88bba1e6c360c5725c4174623f56bcb6d8b54228
Author: James Lee <egypt@metasploit.com>
Date: Wed May 9 14:38:17 2012 -0600
Remove debugging load
commit 02954cbf93e2a13da967780cb703103b3f83ecf4
Merge: d9ef256 88b35a3
Author: James Lee <egypt@metasploit.com>
Date: Wed May 9 12:06:53 2012 -0600
Merge branch 'rapid7' into feature/4905
Conflicts:
data/meterpreter/ext_server_stdapi.php
modules/exploits/windows/browser/adobe_flashplayer_flash10o.rb
commit d9ef2569b88ae8bce67f13316f6eff76311fd846
Author: James Lee <egypt@metasploit.com>
Date: Wed May 2 18:06:06 2012 -0600
PHP doesn't support rev2self
commit bf13ea0ff25541da07b8c099218e5ad7ea6ae8ba
Author: James Lee <egypt@metasploit.com>
Date: Tue May 1 18:21:59 2012 -0600
Add php support for returning new extension commands
commit 7e35f2d671d3797fc3fab12e54015387f44b0b33
Author: James Lee <egypt@metasploit.com>
Date: Tue May 1 16:03:26 2012 -0600
Reset CVE-2012-0507 back to master
Purges commits unrelated to this branch.
commit 86a77b3cd017e1e3a3f23d9fba3b9ed173761f80
Author: James Lee <egypt@metasploit.com>
Date: Tue May 1 15:59:35 2012 -0600
Revert "Make building the jar for cve-2012-0507 a bit easier"
This reverts commit 27ef76522ad10436ec785728445ed2cc0657f85f.
Conflicts:
external/source/exploits/CVE-2012-0507/Makefile
external/source/exploits/CVE-2012-0507/src/msf/x/PayloadX.java
commit 8c259fb779f736be16fe972215ddff1dd32fd0f3
Merge: fe2c273 1c03c2b
Author: James Lee <egypt@metasploit.com>
Date: Tue May 1 15:35:44 2012 -0600
Merge branch 'rapid7' into feature/4905
Conflicts:
data/meterpreter/ext_server_stdapi.jar
data/meterpreter/meterpreter.jar
external/source/meterpreter/java/src/meterpreter/com/metasploit/meterpreter/Meterpreter.java
modules/auxiliary/server/browser_autopwn.rb
commit fe2c273a6d840c67040d6c9e337f908204337e18
Merge: 8caff47 4e955e5
Author: James Lee <egypt@metasploit.com>
Date: Fri Apr 6 10:19:53 2012 -0600
Merge branch 'rapid7' into feature/4905
commit 8caff47d97469f1a5459c04461fd1098487ea514
Author: James Lee <egypt@metasploit.com>
Date: Thu Apr 5 17:51:18 2012 -0600
Fix requires to find the test library
commit 51c33574cee3c47f0b2900c388d3d1213dd0a90d
Author: James Lee <egypt@metasploit.com>
Date: Thu Apr 5 17:48:35 2012 -0600
Fix a load order problem with solaris post mods
commit 81b658362e5e6bdd215d18b53d14429d163aff72
Merge: adad2cf 6ef4257
Author: James Lee <egypt@metasploit.com>
Date: Thu Apr 5 15:43:19 2012 -0600
Merge branch 'master' into feature/4905
commit 6ef42579471c6fde4bba71d0d4ce2c6c3e836180
Merge: 70ab8c0 5852455
Author: James Lee <egypt@metasploit.com>
Date: Thu Apr 5 15:16:56 2012 -0600
Merge branch 'rapid7'
Conflicts:
lib/rex/exploitation/javascriptosdetect.rb
commit adad2cf04c501c2a787e5475b62abd31871c06a0
Author: James Lee <egypt@metasploit.com>
Date: Thu Mar 29 20:20:21 2012 -0600
Deal with null data/jar
Not sure why "" turns into null sometimes, but it was breaking shells;
this fixes it.
commit 4f8a437b490e2b2774f9efd23b4891eaf007cf16
Author: James Lee <egypt@metasploit.com>
Date: Thu Mar 29 18:10:59 2012 -0600
Prev commit moved these to src/a
commit 27ef76522ad10436ec785728445ed2cc0657f85f
Author: James Lee <egypt@metasploit.com>
Date: Thu Mar 29 18:08:32 2012 -0600
Make building the jar for cve-2012-0507 a bit easier
Mostly stolen from cve-2008-5353
commit db3dbad0a5ff20b05758be073c3502138ff095c2
Author: James Lee <egypt@metasploit.com>
Date: Thu Mar 29 14:52:23 2012 -0600
Fix incorrect option name
commit 776976af31795bdf1b405e208a2d4b78a6b6c2cf
Author: James Lee <egypt@metasploit.com>
Date: Wed Mar 28 15:36:20 2012 -0600
Add bap support to java_rhino
commit a611ab16e06bd324d6616d0bd69f2c09d671bca0
Author: James Lee <egypt@metasploit.com>
Date: Wed Mar 28 15:35:16 2012 -0600
Put next_exploit on the window object so it's always in scope
Solves some issues with Chrome not running more than one exploit
commit 5114d35de7c2f234ac7fe4288b344d4f2bb9731f
Author: James Lee <egypt@metasploit.com>
Date: Tue Mar 27 14:31:53 2012 -0600
Pull common stuff up out of the body
commit 748309465a029593e2fe2fd445149745367513f4
Author: James Lee <egypt@metasploit.com>
Date: Tue Mar 27 11:04:03 2012 -0600
Fix indentation level
commit 954d485e3b8ffea9a7451bd495c1956a098e0eda
Author: James Lee <egypt@metasploit.com>
Date: Tue Mar 27 11:02:42 2012 -0600
Abstract out copy-pasted methods
Need to do the same thing for OSX, but it's a different implementation.
commit cba8d7c911fb184f6358948022fd4a0e010878d0
Author: James Lee <egypt@metasploit.com>
Date: Fri Mar 23 18:04:50 2012 -0600
Linux doesn't implement (drop|steal)_token
commit 1cfda3a7b045c08ecfae1ad688e0124e76bd0c8f
Author: James Lee <egypt@metasploit.com>
Date: Fri Mar 23 17:57:37 2012 -0600
Add availability checks for net, sys, ui, and webcam
commit 4bdf39a8bf4b5aab293fc47cb8282d0346db0811
Author: James Lee <egypt@metasploit.com>
Date: Fri Mar 23 16:45:59 2012 -0600
add requirement checking for fs and core commands
commit 42e35971c9f7348b57293b2b94a42dd0260ac7e4
Author: James Lee <egypt@metasploit.com>
Date: Wed Mar 21 17:20:59 2012 -0600
Add a to_octal method that converts e.g. "A" to \0101
commit c3b9415a0a9e2b55b1effbaf2396e11f88301aaa
Author: James Lee <egypt@metasploit.com>
Date: Wed Mar 21 17:20:07 2012 -0600
Don't use "echo -n"
It's not portable
commit b0f3ceccfaedbeaf67fbbe76f1a0a9aec7b44548
Author: James Lee <egypt@metasploit.com>
Date: Tue Mar 20 17:01:10 2012 -0600
Return a list of new commands after core_loadlib, java version
Thanks mihi for the patch and the awesome responsiveness!
commit d65303e1b6458bd4b95138dc0d61e5354c4e8d3a
Author: James Lee <egypt@metasploit.com>
Date: Tue Mar 20 13:21:06 2012 -0600
Make sure we have a response before doing stuff with it
commit 721001ead474a17d1a16de543f78b548879f5e7e
Author: James Lee <egypt@metasploit.com>
Date: Mon Mar 19 21:25:31 2012 -0600
Add missing rmdir and mkdir protocol commands to PHP
Now passes all the stdapi tests that it can
[*] Session type is meterpreter and platform is php/php
[+] should return a user id
[+] should return a sysinfo Hash
[-] FAILED: should return network interfaces
[-] Exception: Rex::Post::Meterpreter::RequestError : stdapi_net_config_get_interfaces: Operation failed: 1
[-] FAILED: should have an interface that matches session_host
[-] Exception: Rex::Post::Meterpreter::RequestError : stdapi_net_config_get_interfaces: Operation failed: 1
[-] FAILED: should return network routes
[-] Exception: Rex::Post::Meterpreter::RequestError : stdapi_net_config_get_routes: Operation failed: 1
[+] should return the proper directory separator
[+] should return the current working directory
[+] should list files in the current directory
[+] should stat a directory
[+] should create and remove a dir
[+] should change directories
[+] should create and remove files
[+] should upload a file
[-] Passed: 10; Failed: 3
commit 024e99167a025f4678a707e1ee809a1524007d4d
Author: James Lee <egypt@metasploit.com>
Date: Mon Mar 19 15:26:00 2012 -0600
Use a proper TLV type instead of a generic one
commit 1836d915cbe0bfd2f536a667e74d8d6a6ccee72a
Author: James Lee <egypt@metasploit.com>
Date: Mon Mar 19 15:24:25 2012 -0600
Fix a counting error that caused segfaults (Linux)
commit 1e419d3fc392e435ae0af703561ce10bd5a45eb0
Author: James Lee <egypt@metasploit.com>
Date: Mon Mar 19 15:06:02 2012 -0600
Return a list of new commands after core_loadlib
Gets Windows back in sync with Linux
commit 3d3959f720de68e2f36ebfabe8196e01f98fe904
Author: James Lee <egypt@metasploit.com>
Date: Mon Mar 19 14:50:55 2012 -0600
Refactor extensionList -> extension_commands
It's not the same as extension_list.
commit a7acb638af803732fc5f3975e0c0632f427e0deb
Author: sinn3r <msfsinn3r@gmail.com>
Date: Sun Mar 18 00:07:27 2012 -0500
Massive whitespace cleanup
commit ef8b9fd5cea7db43860a5b88d7397ba84393ecd5
Author: sinn3r <msfsinn3r@gmail.com>
Date: Sat Mar 17 16:00:20 2012 -0500
Add back enum_protections with some new changes
commit d778eec36953bb9bf4985e967ad2c119a1acd79b
Author: ohdae <bindshell@live.com>
Date: Sat Mar 17 13:28:31 2012 -0400
Added fix for enum_protections
commit 64611819d43bf13ab2d68f4353513c39e5a64fe0
Author: sinn3r <msfsinn3r@gmail.com>
Date: Sat Mar 17 03:14:26 2012 -0500
A bunch of fixes
commit bb1a0205d73e75a61a8fbf5ff6440dd09f9780f9
Author: sinn3r <msfsinn3r@gmail.com>
Date: Sat Mar 17 00:28:05 2012 -0500
The comments in get_chatlogs need an update
commit 666477e42a734f3120dcc4282b01b5ab5819384a
Author: sinn3r <msfsinn3r@gmail.com>
Date: Sat Mar 17 00:25:41 2012 -0500
Correct license format
commit 3c8eecbcd7b952abaca0b1ce14dca41e1d4cabb7
Author: sinn3r <msfsinn3r@gmail.com>
Date: Sat Mar 17 00:22:03 2012 -0500
Add enum_adium.rb post module
commit d290cf4fef1309df9a1af748e7c6c259a6788576
Author: ohdae <bindshell@live.com>
Date: Fri Mar 16 16:54:36 2012 -0300
Changed store_note to store_loot. Fixed local/remote file retrieval
commit ccb830b594ea0f0a8ce7c29b24f2f137ecfd5c4c
Author: James Lee <egypt@metasploit.com>
Date: Fri Mar 16 11:29:07 2012 -0600
Fall back to MIB method if we can't get netmasks
Misses IPv6 addresses, but at least doesn't break everything.
[Fixes#6525]
commit a9a30232dd5fcc0854c10b4d58df8511a23f3091
Author: sinn3r <msfsinn3r@gmail.com>
Date: Fri Mar 16 11:49:31 2012 -0500
This module is not ready, yanked.
commit 6bb34f7fd0785d31902f1edc938a6b05b91a1495
Author: Gregory Man <man.gregory@gmail.com>
Date: Fri Mar 16 18:09:08 2012 +0200
sockso_traversal 1.8 compatibility fix
commit e76965ce565a8ae634dc0d3c743542f1a6d977d7
Author: ohdae <bindshell@live.com>
Date: Fri Mar 16 09:17:35 2012 -0400
fix
commit 61ce7b587de54363f7071bc19df5a29eb29e9aa7
Author: ohdae <bindshell@live.com>
Date: Fri Mar 16 09:14:48 2012 -0400
saves each config to loot instead of notes
commit f4713974fa82d8b13017cb0817b5fd36696194d9
Author: James Lee <egypt@metasploit.com>
Date: Fri Mar 16 03:46:10 2012 -0600
Check for a 0 prefix length
If the OnLinkPrefixLength is 0, something is wrong, try the value in the
prefix linked list. Appears to fix v4 addresses on XP but not 2k3.
[See #6525]
commit cde7fcc012e04880f2faa28226a1fc5834a2e3d5
Author: James Lee <egypt@metasploit.com>
Date: Fri Mar 16 01:46:41 2012 -0600
Return network prefixes when available
Solves #6525 on Vista+. Win2k still works using the old MIB method
(which doesn't support ipv6). Win2k3 and XP are still busted for
unknown reasons.
commit 98bd9a7bd09149f524ebbe1501ec916bf99b078d
Author: ohdae <bindshell@live.com>
Date: Thu Mar 15 22:59:42 2012 -0400
Enumerate important and interesting configuration files
commit 9336df2ac28ee2df10a0e66e7006df3d23493492
Author: David Maloney <David_Maloney@rapid7.com>
Date: Thu Mar 15 19:06:48 2012 -0500
More Virtualisation SSL fixes
commit f24c378281ee6c85f687d4823f09ef5848812daf
Author: David Maloney <David_Maloney@rapid7.com>
Date: Thu Mar 15 18:15:29 2012 -0500
Default SSL to true for esx_fingerprint module
commit d6e14c42120df0fd16b79709ac5723d0e2818810
Author: sinn3r <msfsinn3r@gmail.com>
Date: Thu Mar 15 15:56:24 2012 -0500
Fix typo
commit b24dcfe43e625740ec8a1465f33be02f7ec40162
Author: sinn3r <msfsinn3r@gmail.com>
Date: Thu Mar 15 15:55:54 2012 -0500
Add sockso dir traversal
commit 033052c1e075fcf43e9c17e5ee4a5006247cb375
Author: James Lee <egypt@metasploit.com>
Date: Thu Mar 15 14:31:25 2012 -0600
Fix syntax error in 1.8, thanks Jun Koi for the patch
commit 4529efaeaa22e52c9c7c1528c68efb60af8af729
Author: sinn3r <msfsinn3r@gmail.com>
Date: Thu Mar 15 14:27:40 2012 -0500
enum_protections is now find_apps
commit 49e823802bd8f2cb1940545e74db04f3788352d1
Author: sinn3r <msfsinn3r@gmail.com>
Date: Thu Mar 15 14:22:23 2012 -0500
File rename, as well as design and cosmetic changes
commit ccf6b011145cf9db444f7e2d3fb3ec61738e88cb
Author: ohdae <bindshell@live.com>
Date: Thu Mar 15 15:29:52 2012 -0300
added report_note, removed store_loot function, cleaned up info/author
commit 27d571932e51afbac0c0fcd95c52f038786a9a28
Author: ohdae <bindshell@live.com>
Date: Thu Mar 15 12:18:29 2012 -0300
fixed output newline issue
commit 5a828e35d1629dc68825fe7d9322d1316888f8d7
Author: ohdae <bindshell@live.com>
Date: Thu Mar 15 01:05:35 2012 -0300
fixed save line
commit 805c2ee9871c076a8c0ac62b028a7942af70b6a5
Author: ohdae <bindshell@live.com>
Date: Thu Mar 15 01:02:07 2012 -0300
removed unneeded comments
commit 5861e1512f2949c0d7848d9ebed8241277462085
Author: ohdae <bindshell@live.com>
Date: Thu Mar 15 01:00:55 2012 -0300
fixed output issue
commit 593a3648111f1db1f56a410250539261c2a7cd9f
Author: ohdae <bindshell@live.com>
Date: Wed Mar 14 18:26:53 2012 -0300
removed unneeded dependency
commit 05053e6e74b0ac99bbd4005c40ecc3b1196fd13f
Author: ohdae <bindshell@live.com>
Date: Wed Mar 14 13:30:16 2012 -0400
locates installed 3rd part av, fws, etc
commit 5bf512d0e9d2b412c4107228db178a7078111443
Author: sinn3r <msfsinn3r@gmail.com>
Date: Wed Mar 14 16:50:54 2012 -0500
Add OSVDB-79863 NetDecision Directory Traversal
commit 18715d0367f4ef01b5998d732043cbe224e1787e
Author: James Lee <egypt@metasploit.com>
Date: Wed Mar 14 23:03:01 2012 -0600
Store the retrieved commands on the session
commit b752cb8b31fd8dcd221fb6caa483f6202bf5a4fd
Author: James Lee <egypt@metasploit.com>
Date: Wed Mar 14 22:45:16 2012 -0600
Retrieve the list of new commands
The client side doesn't do anything with them yet
commit 69ce8ef42d4089a0b26644bd4d6bebf57c4cfd50
Author: James Lee <egypt@metasploit.com>
Date: Wed Mar 14 22:41:16 2012 -0600
Return a list of the new commands in response to core_loadlib
Linux
commit 354c754aa4cce63ffebb4567f3bbfd621ffef46c
Author: James Lee <egypt@metasploit.com>
Date: Wed Mar 14 15:13:45 2012 -0600
Whitespace at EOL
commit 4afcb4cb9da1921ede29b03b149433cc65d680da
Author: James Lee <egypt@metasploit.com>
Date: Wed Mar 14 14:30:09 2012 -0600
Create instance methods that return extensions
Before this change, meterpreter sessions would not #respond_to? their
extensions despite having a pseudo-accessor for them:
```
>> client.respond_to? :sys
=> false
>> client.sys
=> #<Rex::Post::Meterpreter::ObjectAliases:0x0000000e263488 @aliases={"config"=>#<Rex::Post::Meterpreter::Extensions::Stdapi::Sys::Config:0x0000000e268dc8 @client=#<Session:meterpreter 192.168.99.1:55882 (192.168.99.1) "uid=1000, gid=1000, euid=1000, egid=1000, suid=1000, sgid=1000 @ wpad">>, "process"=>#<Class:0x0000000e268d20>, "registry"=>#<Class:0x0000000e266da0>, "eventlog"=>#<Class:0x0000000e2654e8>, "power"=>#<Class:0x0000000e263c30>}>
```
After:
```
>> client.respond_to? :sys
=> true
```
commit 70ab8c018f67d15929b6f41322540837ab7b37c5
Merge: a8a3938 5f2bace
Author: James Lee <egypt@metasploit.com>
Date: Tue Apr 3 11:46:25 2012 -0600
Merge branch 'master' into bap-refactor
Conflicts:
external/source/exploits/CVE-2012-0507/Help.java
external/source/exploits/CVE-2012-0507/Makefile
external/source/exploits/CVE-2012-0507/msf/x/Help.java
external/source/exploits/CVE-2012-0507/src/a/Exploit.java
external/source/exploits/CVE-2012-0507/src/a/Help.java
commit a8a393891588a8b5c18e3c2173f1cd9c2480b2d0
Author: James Lee <egypt@metasploit.com>
Date: Thu Mar 29 20:20:21 2012 -0600
Deal with null data/jar
Not sure why "" turns into null sometimes, but it was breaking shells;
this fixes it.
commit 5e5eb39d3ccb62a9fc006be8241cfb97723caa06
Author: James Lee <egypt@metasploit.com>
Date: Thu Mar 29 18:10:59 2012 -0600
Prev commit moved these to src/a
commit 5074eadbea426fc4f83d6d165a01e640ef42b4de
Author: James Lee <egypt@metasploit.com>
Date: Thu Mar 29 18:08:32 2012 -0600
Make building the jar for cve-2012-0507 a bit easier
Mostly stolen from cve-2008-5353
commit bdb3fbe7fd19aa76b4069edca5a78c53fec668c0
Author: James Lee <egypt@metasploit.com>
Date: Thu Mar 29 14:52:23 2012 -0600
Fix incorrect option name
commit 78824ef60084510d3befe0ded6eed314d55eeb12
Author: James Lee <egypt@metasploit.com>
Date: Thu Mar 29 13:24:33 2012 -0600
Add the detected browser version to the DOM
Doing it this way lets modules grab the info a bit more easily.
commit 9813ccb8d6b14e0e728b8a13bacf59dd31b9c4b9
Merge: 0faa3f6 b5fc8e4
Author: James Lee <egypt@metasploit.com>
Date: Thu Mar 29 13:19:05 2012 -0600
Merge branch 'master' into bap-refactor
commit 0faa3f65240c3a2b3ab0e72f4aeb2e9f50ed54ee
Author: James Lee <egypt@metasploit.com>
Date: Wed Mar 28 15:36:20 2012 -0600
Add bap support to java_rhino
commit 66ca27f994e3b11c9c8adae85642820768158860
Author: James Lee <egypt@metasploit.com>
Date: Wed Mar 28 15:35:16 2012 -0600
Put next_exploit on the window object so it's always in scope
Solves some issues with Chrome not running more than one exploit
commit 7fc2ca1a0690c7a973307772aed42ab3514e1761
Merge: 325d306 e48c47e
Author: James Lee <egypt@metasploit.com>
Date: Wed Mar 28 15:10:54 2012 -0600
Merge branch 'master' into bap-refactor
commit 325d3060599bc79674e93dd5f55a4e60061e9bdb
Author: James Lee <egypt@metasploit.com>
Date: Tue Mar 27 14:31:53 2012 -0600
Pull common stuff up out of the body
commit 4f2b3260bf7f14f4d763625792adb0c3cfd1ed7c
Author: James Lee <egypt@metasploit.com>
Date: Tue Mar 27 11:04:03 2012 -0600
Fix indentation level
commit 9b905c53b4d46beb86da8168a1c2c5b2da340f6d
Author: James Lee <egypt@metasploit.com>
Date: Tue Mar 27 11:02:42 2012 -0600
Abstract out copy-pasted methods
Need to do the same thing for OSX, but it's a different implementation.
commit 2027502c5c1364161854794529738344dddb5c50
Author: MM <gaspmat@gmail.com>
Date: Thu Mar 22 18:12:07 2012 +0100
link type must be signed, because dlt_to_linktype can return -1
commit 86027ea77d36d36e39070a54eb5caf3d3490e2e9
Author: MM <gaspmat@gmail.com>
Date: Wed Mar 21 16:03:58 2012 +0100
enable sniffing on any type of interface
commit df6eef12147a294d7f198d057c27e87ed4ffbeb3
Author: MM <gaspmat@gmail.com>
Date: Tue Mar 20 18:01:50 2012 +0100
ps support for linux meterpreter
[Closes#254]
commit df6eef12147a294d7f198d057c27e87ed4ffbeb3
Author: MM <gaspmat@gmail.com>
Date: Tue Mar 20 18:01:50 2012 +0100
ps support for linux meterpreter
[Closes#250]
Object detections are not extensively tested, but everything came from
the "Firefox for developers" series of documents from
developer.mozilla.org; thanks to Artur Szymczak for prompting this
update.
[Fixes#6860]
sinn3r
jvazquez-r7
James Lee
HD Moore
sinn3r
jlee-r7
Tod Beardsley
Raphael Mudge
MM
Christian Mehlmauer