Submitted 1 year ago by eager_eagle@lemmy.world to technology@lemmy.world
[For Terrapin to be viable, the connection it interferes with also must be secured by either “ChaCha20-Poly1305” or “CBC with Encrypt-then-MAC,” both of which are cipher modes added to the SSH protocol (in 2013 and 2012, respectively
Well thats easy then, just change your allowed ciphers.
ChaCha20-Poly1305 sounds like an auto-generated Reddit username.
You’ll also have to be connecting to unknown networks or be the subject of a very targeted hacker. If you don’t connect to “free wifi” at the airport no one is going to get to position themselves as the middle man in order to do this attack on you very easily.
I like this internet turtle.
OH MY GOD! Mario was right! There’s turtles In the pipes!
I mean, we’ve kinda always known and spoken of that 💩
Turtles are such underrated creatures and most people don't realise how important they are to computer science. Turtle robots! Turtle graphics! Not to even mention the very concept of shell access! And yes, turtles are probably very happy that Secure Shell was invented.
Sudo Cowabunga
Heroes in a half-shell
I too lol
MitM attacks are also one of the major threats to MFA.
They don’t seem to talk much about TLS which is the current standard for most things (VoIP, email.) We still use ssh for a lot but HTTPS is secured through TLS 1.3
This is the best summary I could come up with:
Once in place, this piece of dedicated hardware surreptitiously inhaled thousands of user names and passwords before it was finally discovered.
Ylönen, who at the time knew little about implementing strong cryptography in code, set out to develop the Secure Shell Protocol (SSH) in early 1995, about three months after the discovery of the password sniffer.
As one of the first network tools to route traffic through an impregnable tunnel fortified with a still-esoteric feature known as “public key encryption,” SSH quickly caught on around the world.
Today, it’s hard to overstate the importance of the protocol, which underpins the security of apps used inside millions of organizations, including cloud environments crucial to Google, Amazon, Facebook, and other large companies.
Now, nearly 30 years later, researchers have devised an attack with the potential to undermine, if not cripple, cryptographic SSH protections that the networking world takes for granted.
The attack targets the BPP, short for Binary Packet Protocol, which is designed to ensure that adversaries with an active position can’t add or drop messages exchanged during the handshake.
The original article contains 658 words, the summary contains 178 words. Saved 73%. I’m a bot and I’m open source!
Finland has done a lot for the industry… Hyvää Suomi!
Piatro@programming.dev 1 year ago
Bit of an alarmist headline here. The vulnerability has been patched in the most common clients (openssh) and it was because the protocol wasn’t being implemented correctly. To say that the SSH protocol “just got a lot weaker” is just not true.
admiralteal@kbin.social 1 year ago
Literally the exact opposite is true, I would say.
eager_eagle@lemmy.world 1 year ago
It doesn’t look that simple to me. From the Terrapin paper:
qx128@lemmy.world 1 year ago
Yeaaaa, a complete redesign from scratch sounds way more dangerous. “Noah, get the boat” isn’t always the best answer. There’s been a lot of thought and testing put into the magnificent work that is SSH over the past few decades.
Piatro@programming.dev 1 year ago
Yes I was wrong to say that this an implementation detail rather than a protocol problem as the OpenSSH release notes to prevent this vulnerability include extensions to the SSH Transport Protocol, however I still believe that the headline is sensationalist at best since it can and has been protected against by patching ssh clients and servers. It would be entirely unreasonable in the majority of cases to simply stop using SSH on the basis of this vulnerability and that’s why I think the headline exaggerates the problem. The Register has a much more measured take on this including comments from the paper’s authors that people shouldn’t panic and try to fix immediately.
originalfrozenbanana@lemm.ee 1 year ago
Whole system rewrites are almost never a good idea
pajn@lemmy.blahaj.zone 1 year ago
TLS and SSH has quite different attack vectors so sure, basing SSH on TLS 1.3 would prevent the problems SSH has, but also bring in the problems TLS has. Thing is, I much prefer SSHs tradeof for things SSH is used for while TLS could be argued makes a lot more sense for the HTTPS use case. It just very different chains of trust with very different weak points, just pointing at TLS 1.3 as a solution when talking about SSH is quite ignorant.