Vulnerability CVE-2015-7225
Published: 2017-09-06

Description:
Tinfoil Devise-two-factor before 2.0.0 does not strictly follow section 5.2 of RFC 6238 and does not "burn" a successfully validated one-time password (aka OTP), which allows remote or physically proximate attackers with a target user's login credentials to log in as said user by obtaining the OTP through performing a man-in-the-middle attack between the provider and verifier, or shoulder surfing, and replaying the OTP in the current time-step.

CVSS2 => (AV:N/AC:M/Au:S/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
3.5/10
2.9/10
6.8/10
Exploit range
Attack complexity
Authentication
Remote
Medium
Single time
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Tinfoilsecurity -> Devise-two-factor 

 References:
http://www.openwall.com/lists/oss-security/2015/06/20/4
http://www.openwall.com/lists/oss-security/2015/09/17/2
http://www.securityfocus.com/bid/76789
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=798466
https://github.com/tinfoil/devise-two-factor/blob/master/UPGRADING.md
https://github.com/tinfoil/devise-two-factor/issues/45#issuecomment-139335608
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