Can't join a server.

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by gangstahboy632 » 7/15/2012

When i join any server it says " Internal client error: java.io.IOExecption: Server returned HTTP response code: 503 for URL: http//session.minecraft.net/game/joinserver.jsp?user=Scakk&sessionId=550393972170805491&serverId=7b45e83901ad328
can't join any server. Please help.
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by DarkStar4657 » 7/15/2012

Minecraft Got Hacked,That's what ive heard.
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by jackmawer » 7/15/2012

Minecraft login servers got hacked, don't worry they should be online soon, mojang closed the login servers so the problem can be fixed :D

But for now, they are offline :x
(psst: if you want to play minecraft, download the cracked viewer and play on the icecraft cracked server, ip: play.alexsoft-bg.com)
Last edited by jackmawer on 7/15/2012, edited 1 time in total.
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by Brian568516461 » 7/15/2012

UPDATE: 8.41am BST: Mojang have pulled down the session server. This should stop the issue while a proper fix is being worked on!
UPDATE: 8.52am BST: mojang blog post
Hi all. Over the past few days, numerous people have reported notch logging in to their servers. From the dialogue and IP, it was pretty obvious it wasn't really notch.
Then today on the reddit servers, we had someone log in on the account of one of our head admins. The resulting griefing was quickly caught, the account password changed, and we waited to see if further attacks would follow. After a short period, the same account was used again. The admin, forty_two, confirmed that he hasn't logged into any unknown servers lately, ruling out a MITM attack. The short time between changing the password and logging in ruled out a brute force attack on the account.
We took the servers down and began investigating. I made a post to /r/admincraft with the thought of cross-comparing plugin lists to find one with a back door. We decompiled and pulled PEX and NoCheatPlus apart, and found no back doors.
To eliminate the chance of it being a plugin bug/backdoor, we put a honeypot server up on c.nerd.nu with a minecraft protocol proxy attached, to record how they were triggering it. Within an hour, the hackers were back and connected to the (now whitelisted) c.nerd.nu server, again as forty_two. Here's the relevant portion of the log:
[20:01:28] >>> 0x02: Handshake {'username_host': u'forty_two;c.nerd.nu:25565'}
[20:01:28] <<< 0x02: Handshake {'connection_hash': u'xxx'}
[20:01:29] >>> 0x01: Login request {'username': u'forty_two', 'not_used_6': 0, 'not_used_4': 0, 'not_used_5': 0, 'not_used_2': 0, 'not_used_3': 0, 'not_used_1': u'', 'protocol_version': 29}
[20:01:29] <<< 0x01: Login request {'entity_id': 1172, 'world_height': 0, 'not_used_2': 0, 'not_used_1': u'', 'game_mode': 1, 'max_players': 60, 'level_type': u'default', 'dimension': 0}
We also patched bukkit to print information about the authentication step:
[INFO] LoginPacketName forty_two; ServerID xxx; Request URL http://session.minecraft.net/game/check ... rverId=xxx
[INFO] Response is YES
[INFO] forty_two [/xxx:54685] logged in with entity id 381 at ([world] 3.399717322546743, 64.0, 10.73634280242685)
What's striking here is that there's nothing unusual. If it had been a bukkit plugin backdoor, we'd see some kind of communication with the plugin to tell it to skip the user auth. If it had been some kind of protocol/string packing exploit in minecraft server, again we'd see it in the packets. Nor is a minecraft session server error being triggered. The only explanation is that someone has found an exploit in the minecraft login server. It affects vanilla servers and bukkit servers equally.
After some sleuthing, we determined and confirmed that the exploit only affects accounts which have been migrated to a Mojang account. If you log into minecraft with your email address, you’re vulnerable.
A few hours ago we spoke to Dinnerbone, who got in contact with Grum and EvilSeph, and confirmed the exploit existed. We held off posting, hoping it would be fixed before the griefing community at large finds out about it. Information on how to use this exploit has now been made public, and as such we feel duty bound to advise that all server admins should do as we did and either take your servers offline or install a secondary authentication plugin. - fix now being worked on by mojang, this advice no longer applies.
A more detailed post to /r/mcpublic will follow.
TL;DR: hackers can log in as any migrated user! take your server down or use secondary authentication! see updates up top - taking your server down is no longer necessary.
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by gangstahboy632 » 7/15/2012

Thanks guys for your answers! Minecraft better be back soon :D
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by Domo221212 » 9/8/2012

I had the same trouble but the funny thing is that my norton said that there was a risk (nothing to do with minecraft) and I was worried like hell.
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by BrayDawnRaidOn » 9/8/2012

Multiplayer session servers are down rn. Nothing is wrong with your client or your server. If you can't connect to your client that means that login servers are down as well. Always check the help page on minecraft.net
they tell you the current status of their servers.
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by Whoever01 » 9/8/2012

Patient, it wasnt hacked, they are just doing maintanence, I just got a server up and started spawn, changed to my other texture and couldnt get back in
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by ciler86 » 9/8/2012

Domo221212 wrote:I had the same trouble but the funny thing is that my norton said that there was a risk (nothing to do with minecraft) and I was worried like hell.

The reason that is happening is that Norton and Minecraft don't play well together you would be better off getting another anti virus like avast or somthing
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by Axis_Bolts » 9/9/2012

ciler86 wrote:
Domo221212 wrote:I had the same trouble but the funny thing is that my norton said that there was a risk (nothing to do with minecraft) and I was worried like hell.

The reason that is happening is that Norton and Minecraft don't play well together you would be better off getting another anti virus like avast or somthing




Get AVG or MALWAREBYTES

They , together, will keep your computer safe as long as you do full scans regularly.
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by beastybunnies » 9/9/2012

##PLEASE HELP##
I cannot connect to ANY tekkit server?!?!
i go to multiplayer and click on a server that sais is has 3-4 bars.
when i click on it, it sais "Failed To Login: Error" i tried logging in again and still the same thing popped up! IDK WHAT HAPPENED!!!!
PLEASE REPLY TO THIS!!
##PLEASE HELP##
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by beastybunnies » 9/9/2012

##PLEASE HELP##
I cannot connect to ANY tekkit server?!?!
i go to multiplayer and click on a server that sais is has 3-4 bars.
when i click on it, it sais "Failed To Login: Error" i tried logging in again and still the same thing popped up! IDK WHAT HAPPENED!!!!
PLEASE REPLY TO THIS!!
##PLEASE HELP##[/quote]
Now it sais HTTP response code: 503 for URL: http://session.minecrft.net/game/joinse ... tybunnies& : and then it goes off the screen.
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