Description
Vaultwarden is a Bitwarden-compatible server written in Rust. Prior to 1.35.4, there is a security vulnerability in Vaultwarden that allows bypassing the login brute-force protection if email 2fa is enabled. If email 2fa is enabled, the unprotected 2fa-function send_email_login (email.rs, api endpoint /api/two-factor/send-email-login) also acts as an oracle determining whether a username-password combination is correct. An attacker can abuse that endpoint to brute-force passwords without rate-limiting. This works even for users who don't have email 2fa configured. This vulnerability is fixed in 1.35.4.
Problem types
CWE-307: Improper Restriction of Excessive Authentication Attempts
Product status
References
github.com/...warden/security/advisories/GHSA-c5rv-q295-7w4g
github.com/...warden/security/advisories/GHSA-c5rv-q295-7w4g
github.com/dani-garcia/vaultwarden/pull/6867
github.com/dani-garcia/vaultwarden/releases/tag/1.35.4