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Go Back   The Unreal Admins Page > Forums > Hosted Forums > AnthraXs Corner > General Chat

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  #1  
Unread 19th July, 2010, 03:16 AM
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Default [Release] unreliable-adv security patch

This is a security patch for UT v451 servers. The vulnerability is described here: http://aluigi.altervista.org/adv/unreliable-adv.txt

The UT v440/451 windows and linux servers are affected by this vulnerability. UT v436 is immune. This patch only works on v451 servers. Do NOT install it on v440/436 servers. Due to the nature of the function that contains the vulnerability, I cannot fix this externally in ServerCrashFix. The only way to fix this properly is to edit the source code (but it doesn't look like that's going to happen). This patch doesn't fix the vulnerability, it simply prevents the server from crashing.

Installation:

* Shut down the server.
* If you run linux, replace Engine.so with the file attached to this post. If you run windows, replace Engine.dll.
* Restart the server.

For Unreal Engine licensees:

In UnChan.cpp, UChannel::ReceivedRawBunch:

Replace:

checkSlow(NumInRec<=RELIABLE_BUFFER);

With:

if (NumInRec>=RELIABLE_BUFFER-1)
{
Connection->State = USOCK_Closed;
}
Attached Files
File Type: zip unreliable-adv-patch.zip (1.25 MB, 243 views)

Last edited by AnthraX : 19th July, 2010 at 03:22 AM.
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  #2  
Unread 19th July, 2010, 03:50 AM
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Very cool - Thank you mate!
Hope some more people read this info, very interesting!
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  #3  
Unread 19th July, 2010, 05:26 AM
SoNY_scarface SoNY_scarface is offline
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Nice, thank you Anth
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  #4  
Unread 19th July, 2010, 08:36 AM
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shwwweeet!
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  #5  
Unread 19th July, 2010, 05:37 PM
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Patched last night. Thanks Anth and good work.
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  #6  
Unread 20th July, 2010, 12:11 AM
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Well patched no problem but ACE servers are kicking me and i cant play...(yeah i replaced the old file , no backup so im fucked)

That goes for you tu Scar, white list it please
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  #7  
Unread 20th July, 2010, 12:22 AM
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Ehm, this fix should only be placed on servers, and not on clients ...
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  #8  
Unread 20th July, 2010, 01:33 AM
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Quote:
Originally Posted by Chronox View Post
Well patched no problem but ACE servers are kicking me and i cant play...(yeah i replaced the old file , no backup so im fucked)

That goes for you tu Scar, white list it please
Quote:
Originally Posted by AnthraX View Post
This is a security patch for UT v451 servers.
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  #9  
Unread 20th July, 2010, 04:31 AM
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Quote:
Originally Posted by AnthraX View Post
This is a security patch for UT v451 servers.
Server-side only, Chronox.

~Johnny Jones
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  #10  
Unread 20th July, 2010, 08:02 AM
SoNY_scarface SoNY_scarface is offline
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.....Jesus do you read? Lol
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  #11  
Unread 20th July, 2010, 03:41 PM
[G4U]The_Sp00nHead [G4U]The_Sp00nHead is offline
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Thanks Anth ....

Patching now !!

Sp00neY
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  #12  
Unread 20th July, 2010, 03:46 PM
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Lol then im screwed xD !!

Cant play on UK servers anymore.
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  #13  
Unread 20th July, 2010, 04:13 PM
SoNY_scarface SoNY_scarface is offline
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Which version of UT are you running? 436 or 451?
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  #14  
Unread 20th July, 2010, 06:42 PM
Genecom Genecom is offline
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Quote:
Originally Posted by Chronox View Post
Lol then im screwed xD !!

Cant play on UK servers anymore.
Download the 436Nodelta patch and you'll be fine.
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  #15  
Unread 21st July, 2010, 04:12 AM
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I use v451b and i dont want to reinstall anything =X ??

Can i just get the engine file form somewhere and replace it again ?
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  #16  
Unread 21st July, 2010, 07:51 AM
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Quote:
Originally Posted by Chronox View Post
I use v451b and i dont want to reinstall anything =X ??

Can i just get the engine file form somewhere and replace it again ?
Why would you run 451 as a client anyway?
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  #17  
Unread 21st July, 2010, 10:33 AM
SoNY_scarface SoNY_scarface is offline
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Quote:
Originally Posted by Chronox View Post
I use v451b and i dont want to reinstall anything =X ??

Can i just get the engine file form somewhere and replace it again ?

You don't need to re-install everything.

Download the 436nodeltapatch on the uk site and just run it. Make sure you keep a copy of your user.ini and unrealtournament.ini so that you don't lose your settings.
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  #18  
Unread 21st July, 2010, 01:05 PM
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If you are adamant on running 451b (no idea why on a client) then just download the 451b patch zip again and copy the engine file out of it.
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  #19  
Unread 21st July, 2010, 11:50 PM
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Patched, thanks alot!
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  #20  
Unread 2nd August, 2010, 01:36 PM
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what does this patch exactly covers?

has this to do somethign with buffer overflow or ddos? or something?
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