CVE-2024-8796— Insufficient Default OTP Shared Secret Length
Quick assessment
Affected
devise-two-factor devise-two-factor
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Devise-Two-Factor是Devise-Two-Factor开源的一个 Devise 的极简扩展。用于通过 TOTP 方案提供对双因素身份验证的支持。 Devise-Two-Factor 2.2.0及之前版本和6.0.0之前版本存在安全漏洞，该漏洞源于生成的TOTP共享密钥长度不足，可能使攻击者更容易生成有效的TOTP代码。
Possible ATT&CK Techniques 1 AI
T1528 · Steal Application Access Token
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I. Basic Information for CVE-2024-8796
Vulnerability Information
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Vulnerability Title
Insufficient Default OTP Shared Secret Length
Source: CVE Program / CVE List V5
Vulnerability 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 Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息熵不充分
Source: CVE Program / CVE List V5
Vulnerability Title
Devise-Two-Factor 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Devise-Two-Factor是Devise-Two-Factor开源的一个 Devise 的极简扩展。用于通过 TOTP 方案提供对双因素身份验证的支持。 Devise-Two-Factor 2.2.0及之前版本和6.0.0之前版本存在安全漏洞，该漏洞源于生成的TOTP共享密钥长度不足，可能使攻击者更容易生成有效的TOTP代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| devise-two-factor | devise-two-factor | 4.0.0 ~ 6.0.0 | - |
|
II. Public POCs for CVE-2024-8796
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same product: devise-two-factor
V. Comments for CVE-2024-8796
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