Home
Help
Search
Login
Register
OPNsense Forum
»
Archive
»
16.7 Legacy Series
»
New Attack
« previous
next »
Print
Pages: [
1
]
Author
Topic: New Attack (Read 5995 times)
fabian
Hero Member
Posts: 2769
Karma: 200
OPNsense Contributor (Language, VPN, Proxy, etc.)
New Attack
«
on:
August 25, 2016, 05:30:33 pm »
There is a new attack against 64 bit ciphers:
https://sweet32.info/
Please be careful when using an affected cipher especially when using it with vpn.
fabian
Logged
bobbythomas
Full Member
Posts: 134
Karma: 5
Re: New Attack
«
Reply #1 on:
August 26, 2016, 08:00:30 am »
Thanks for the update Fabian. Will make sure unaffected Ciphers are used for encryption.
Regards,
Bobby Thomas
Sent from my ONE A2003 using Tapatalk
Logged
franco
Administrator
Hero Member
Posts: 17473
Karma: 1587
Re: New Attack
«
Reply #2 on:
August 26, 2016, 05:35:09 pm »
My favourite bit: "by capturing around 785 GB of traffic". That's a lot for a persistent session.
Not saying this isn't a problem and that standards need to be changed (which OpenVPN did not do during their 2.3.12 bump this week), but it's easy to work around the threat model class or avoid it in particular domains.
An example: old PGP keys still use 3DES by default, but the attack is not applicable because an email will not easily sum up to what is required by the POC.
Cheers,
Franco
Logged
Julien
Hero Member
Posts: 666
Karma: 33
Re: New Attack
«
Reply #3 on:
August 27, 2016, 10:01:13 pm »
Is this also for users using SSL + User Authentication radius authentication ?
Logged
OPNsense 23.1.7_3-amd64
FreeBSD 13.1-RELEASE-p7
OpenSSL 1.1.1t 7 Feb 2023
franco
Administrator
Hero Member
Posts: 17473
Karma: 1587
Re: New Attack
«
Reply #4 on:
August 28, 2016, 01:56:37 pm »
Yes. SSL and user credentials are for authentication, not tunnel encryption.
Logged
Print
Pages: [
1
]
« previous
next »
OPNsense Forum
»
Archive
»
16.7 Legacy Series
»
New Attack