CVE-2024-8796 json
Insufficient Default OTP Shared Secret Length
published 2024-09-17 2 y ago modified 2026-06-17 4 mo ago also GHSA-qjxf-mc72-wjr2 , EUVD-2024-2856
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 50%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- rubygems devise-two-factor 6.0.0
- devise-two-factor devise-two-factor 6.0.0
- ruby-devise-two-factor Ubuntu Pro 20.04 LTS 3.1.0-2ubuntu0.1~esm1
- ruby-devise-two-factor Ubuntu Pro 22.04 LTS 4.0.0-2ubuntu0.1~esm1
ubuntu advisories UBUNTU-CVE-2024-8796
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.64% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.0 | CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |
| CNA | 4.0 | 6.0 | CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |
| GitHub | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| rubygems | devise-two-factor | >=4.0.0, <6.0.0 1 listed version |
6.0.0 |
Affected products
- devise-two-factor devise-two-factor
Classification
- Weakness
-
- CWE-331 Insufficient Entropy
References
-
github.com
/devise-two-factor/devise-two-factor/commit/cc6f34423d9c6af9f3e02be478c3c40dc7462e19
web
-
github.com
/devise-two-factor/devise-two-factor/security/advisories/GHSA-qjxf-mc72-wjr2
vendor-advisory, web, mitigation
-
nvd.nist.gov
/vuln/detail/CVE-2024-8796
advisory
-
github.com
/devise-two-factor/devise-two-factor
package
Sources
- CVE List CVE-2024-8796
- GitHub Advisory GHSA-qjxf-mc72-wjr2
- NVD CVE-2024-8796
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