CVE-2024-8796 Insufficient Default OTP Shared Secret Length
Insufficient TOTP secret length in Devise-Two-Factor allows attackers to more easily guess secrets and bypass two-factor authentication.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-8796?
CVE-2024-8796 is a medium-severity vulnerability in devise-two-factor, published on 17 Sep 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-331
Which versions are affected by CVE-2024-8796?
4 open source packages ship an affected version, including devise-two-factor. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
devise-two-factor RubyGems | All versions | None |
devise-two-factor RubyGems | All versions | None |
devise-two-factor RubyGems | From 4.0.0 | 6.0.0 |
devise-two-factor RubyGems | From 4.0.0 | 6.0.0 |
Products include Tinfoilsecurity Devise-Two-Factor.
How do I fix CVE-2024-8796?
Upgrade devise-two-factor to 6.0.0 or later.
Is CVE-2024-8796 being exploited?
There is no known exploitation of CVE-2024-8796 in the wild and no public exploit code.
Other vulnerabilities in devise-two-factor
Sources
Also known as DEBIAN-CVE-2024-8796, GHSA-qjxf-mc72-wjr2, UBUNTU-CVE-2024-8796.