Added note that when a target is properly configured against the Terrapin vulnerability that unpatched peers may still create vulnerable connections. Updated Ubuntu Server & Client 20.04 & 22.04 policies to include new key exchange markers related to Terrapin counter-measures.

This commit is contained in:
Joe Testa
2023-12-19 14:03:28 -05:00
parent 8e972c5e94
commit c259a83782
16 changed files with 183 additions and 56 deletions

View File

@ -36,8 +36,9 @@
(key) ssh-ed25519-cert-v01@openssh.com (256-bit cert/256-bit ssh-ed25519 CA) -- [info] available since OpenSSH 6.5
# encryption algorithms (ciphers)
(enc) chacha20-poly1305@openssh.com -- [info] available since OpenSSH 6.5
 `- [info] default cipher since OpenSSH 6.9
(enc) chacha20-poly1305@openssh.com -- [warn] vulnerable to the Terrapin attack (CVE-2023-48795), allowing message prefix truncation
`- [info] available since OpenSSH 6.5
`- [info] default cipher since OpenSSH 6.9
(enc) aes128-ctr -- [info] available since OpenSSH 3.7, Dropbear SSH 0.52
(enc) aes192-ctr -- [info] available since OpenSSH 3.7
(enc) aes256-ctr -- [info] available since OpenSSH 3.7, Dropbear SSH 0.52
@ -77,6 +78,7 @@
(rec) -hmac-sha1-etm@openssh.com -- mac algorithm to remove 
(rec) +rsa-sha2-256 -- key algorithm to append 
(rec) +rsa-sha2-512 -- key algorithm to append 
(rec) -chacha20-poly1305@openssh.com -- enc algorithm to remove 
(rec) -diffie-hellman-group14-sha256 -- kex algorithm to remove 
(rec) -hmac-sha2-256 -- mac algorithm to remove 
(rec) -hmac-sha2-512 -- mac algorithm to remove