5.3 CVE-2024-8796

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.
https://nvd.nist.gov/vuln/detail/CVE-2024-8796

Categories

CWE-331 : Insufficient Entropy
The product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others. Determine the necessary entropy to adequately provide for randomness and predictability. This can be achieved by increasing the number of bits of objects such as keys and seeds. Insufficiently random data used to generate session tokens using C rand(). Also, for certificate/key generation, uses a source that does not block when entropy is low. Chain: insufficient precision (CWE-1339) inrandom-number generator causes some zero bits to be reliablygenerated, reducing the amount of entropy (CWE-331)

References

disclosure@synopsys.com

https://github.com/devise-two-factor/devise-two-factor/security/advisories/GH... Mitigation Vendor Advisory

CPE

cpe	start	end
Configuration 1
cpe:2.3:a:tinfoilsecurity:devise-two-factor::::::::	>= 4.0.0	< 6.0.0
cpe:2.3:a:tinfoilsecurity:devise-two-factor:1.0.0:::::::*

REMEDIATION

EXPLOITS

Exploit-db.com

id	description	date
No known exploits

POC Github

Url
No known exploits

Other Nist (github, ...)

Url
No known exploits

CAPEC

Common Attack Pattern Enumerations and Classifications

id	description	severity
59	Session Credential Falsification through Prediction This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking. [Find Session IDs] The attacker interacts with the target host and finds that session IDs are used to authenticate users. [Characterize IDs] The attacker studies the characteristics of the session ID (size, format, etc.). As a results the attacker finds that legitimate session IDs are predictable. [Match issued IDs] The attacker brute forces different values of session ID and manages to predict a valid session ID. [Use matched Session ID] The attacker uses the falsified session ID to access the target system.	High

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