CVE-2024-8796
Publication date 17 September 2024
Last updated 3 July 2025
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| ruby-devise-two-factor | 25.04 plucky |
Not affected
|
| 24.04 LTS noble |
Not affected
|
|
| 22.04 LTS jammy |
Fixed 4.0.0-2ubuntu0.1~esm1
|
|
| 20.04 LTS focal |
Fixed 3.1.0-2ubuntu0.1~esm1
|
|
| 16.04 LTS xenial |
Vulnerable
|
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Get Ubuntu Pro 30-day free trialSeverity score breakdown
| Parameter | Value |
|---|---|
| Base score |
5.3 · Medium
|
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |
References
Related Ubuntu Security Notices (USN)
- USN-7050-1
- Devise-Two-Factor vulnerabilities
- 1 October 2024