CVE-2024-8796

Name	CVE-2024-8796
Description	Under the default configuration, Devise-Two-Factor versions >= 2.2.0 & < 6.0.0 generate TOTP shared secrets that are 120 bits instead of the 128-bit minimum defined by RFC 4226. Using a shared secret shorter than the minimum to generate a multi-factor authentication code could make it easier for an attacker to guess the shared secret and generate valid TOTP codes.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1082382

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
ruby-devise-two-factor (PTS)	stretch	3.0.0-2	vulnerable
	bullseye	3.1.0-2	vulnerable
	sid, bookworm	4.0.2-1	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
ruby-devise-two-factor	source	stretch	(unfixed)	end-of-life
ruby-devise-two-factor	source	(unstable)	(unfixed)			1082382

https://github.com/devise-two-factor/devise-two-factor/security/advisories/GHSA-qjxf-mc72-wjr2