Future Beta Velocity Bypass

[Th3L1nk]

Describe the bypass and how to replicate it

I have no idea how it works, I dont have future beta, but I fight people who do and they take no knockback and have stated openly that future beta has a bypass.

Grim version

2.3.45

Server version

1.19

Plugins

whatever plugins 2b2t runs

[catgirljenni]

malding

[oragejuice]

I think they're using this, I tested it on 2b and seems to work the same. The bypass part from the velocity module is:

            if (event.getPacket() instanceof EntityVelocityUpdateS2CPacket ) {
                EntityVelocityUpdateS2CPacket  var4 = event.getPacket();
                if (var4.getId() == mc.player.getId()) {
                    event.cancel();
                    grimTicks = 6;
                }
            }
            if (event.getPacket() instanceof PlayPingS2CPacket && grimTicks > 0) {
                event.cancel();
                grimTicks--;
            }```

[Th3L1nk]

Thank you for adding this oragejuice. Velocity is ultimately the biggest hindrance to the current meta, and it's unfortunately very tricky to patch.

[c0dingnoobi]

https://github.com/GrimAnticheat/Grim/pull/1057 pls merge this..

this check would successfully flag any transaction/ping packet cancellings to bypass velocity without falses. i rlly can not understand why this pr is still open

[Th3L1nk]

if thats the case then why does future betas velo still seem to work on 2b

[Th3L1nk]

I believe that they updated it yesterday no?

[c0dingnoobi]

Transactions do get dropped in some situations

as mentioned in the pr that check is valid, and is used by multiple servers (1.8 1.20 1.19 since months (and multiversions)) checking transaction order is a valid approach karhu/polar even do it too

2b2t runs an older version of Grim as far as I know.

i dont know about 2b2ts current situation of what version they run im just saying, using that check we could avoid further "bypasses"

[c0dingnoobi]

just checked again and yes its patched by https://github.com/GrimAnticheat/Grim/commit/1bed34d73c477861694ef5244aba8715944cd059

we either have to assume that 2b2t uses an old version which i doubt since that commit is from june or future does something else than the shown snippet

[c0dingnoobi]

this was patched a long time ago

still confused when he said I tested it on 2b and seems to work the same

[c0dingnoobi]

doesnt since https://github.com/GrimAnticheat/Grim/commit/1391fc554961e7d4a49feb08e55fd20dc75a7190 well 2b2t might not be on that ver yet

[flufferyomada]

From my knowledge Their Version is atleast from august

[master7720]

Free0x22

[AoElite]

I've tested Future Beta & it doesn't appear to bypass grim. Maybe 2b2t has configured grim wrong.

[Th3L1nk]

what version were you testing and what configs

[skdii]

wdym future doesnt have working velocity nor does beta build. It only works on 2b2t since its very old version but it doesnt work so idk what u yappin about

[skdii]

ture Beta & it doesn't appear to bypass grim. Maybe 2b2t has configured grim wrong.

bro you do not have future beta stop lyin 😭 💀

[AoElite]

ture Beta & it doesn't appear to bypass grim. Maybe 2b2t has configured grim wrong.

bro you do not have future beta stop lyin 😭 💀

I don't have future beta and never claimed I did, but I know someone who does & did test it. However I don't know if they were using the latest version of it and I haven't tested it since. There could have been updates made after. I also tested it on the very latest grim at the time & not on 2b2t.

[skdii]

"Ive tested" , Wild aswell you were probably testing the public release, I doubt any beta user would help develop a patch