Vulnerability · Published Sep 17, 2024 · Assigned by SNPS

CVE-2024-8796Insufficient Default OTP Shared Secret Length

Medium 5.3

In plain English

A medium-severity security flaw in devise-two-factor from devise-two-factor. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 51% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.6%top 49.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	ruby-devise-two-factor	no fix listed	DEBIAN-CVE-2024-8796
RubyGems	devise-two-factor	6.0.0	GHSA-qjxf-mc72-wjr2
RubyGems	devise-two-factor	no fix listed	GHSA-qjxf-mc72-wjr2

Affected products (as reported)

Vendor	Product	Versions
devise-two-factor	devise-two-factor	4.0.0 – before 6.0.01.0.0

Weakness: CWE-331 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

References

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