[Release] unreliable-adv security patch

[AnthraX]

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;
}

[Genecom]

Very cool - Thank you mate!
Hope some more people read this info, very interesting!

[SoNY_scarface]

Nice, thank you Anth

[qwerty]

shwwweeet!

[SC]-[LO]\[G_{HoF}]

Patched last night. Thanks Anth and good work.

[Chronox]

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

[Sp0ngeb0b]

Ehm, this fix should only be placed on servers, and not on clients ...

[LeeBe]

Originally Posted by Chronox

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

Originally Posted by AnthraX

This is a security patch for UT v451 servers.

[{DOU}Draco]

Originally Posted by AnthraX

This is a security patch for UT v451 servers.

Server-side only, Chronox.

~Johnny Jones

[SoNY_scarface]

.....Jesus do you read? Lol

[[G4U]The_Sp00nHead]

Thanks Anth ....

Patching now !!

Sp00neY

[Chronox]

Lol then im screwed xD !!

Cant play on UK servers anymore.

[SoNY_scarface]

Which version of UT are you running? 436 or 451?

[Genecom]

Originally Posted by Chronox

Lol then im screwed xD !!

Cant play on UK servers anymore.

Download the 436Nodelta patch and you'll be fine.

[Chronox]

I use v451b and i dont want to reinstall anything =X ??

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

[kawaii]

Originally Posted by Chronox

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?

[SoNY_scarface]

Originally Posted by Chronox

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.

[MyM]

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.

[SesioN]

Patched, thanks alot!

[-=V@STV$T=-]

what does this patch exactly covers?

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