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CVE-2021-43177

Quick assessment

Affected
Tinfoil 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 4.0.2 之前的版本中存在安全漏洞，攻击者可以将一次性密码 (OTP) 重用于一个（并且只有一个）紧随其后的间隔。

AI Predicted 6.5 Difficulty: Easy EPSS 0.88% · P58

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2021-43177

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
As a result of an incomplete fix for CVE-2015-7225, in versions of devise-two-factor prior to 4.0.2 it is possible to reuse a One-Time-Password (OTP) for one (and only one) immediately trailing interval. CVSS Vector: (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
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
7PK-安全功能
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 4.0.2 之前的版本中存在安全漏洞，攻击者可以将一次性密码 (OTP) 重用于一个（并且只有一个）紧随其后的间隔。
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
Tinfoil devise-two-factor < 4.0.2 -

II. Public POCs for CVE-2021-43177

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III. Intelligence Information for CVE-2021-43177

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Vendor Advisories for CVE-2021-43177 (1)

IV. Related Vulnerabilities

Same product: devise-two-factor
Same weakness: CWE-254

V. Comments for CVE-2021-43177

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