Tinfoil Devise-two-factor up to 2.0.0 OTP 7pk security

Summaryinfo

A vulnerability categorized as critical has been discovered in Tinfoil Devise-two-factor up to 2.0.0. The affected element is an unknown function of the component OTP Handler. Executing a manipulation can lead to 7pk security. This vulnerability is handled as CVE-2015-7225. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical was found in Tinfoil Devise-two-factor up to 2.0.0. This vulnerability affects an unknown functionality of the component OTP Handler. The manipulation with an unknown input leads to a 7pk security vulnerability. The CWE definition for the vulnerability is CWE-254. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The bug was discovered 09/17/2015. The weakness was released 09/06/2017 by Justin Bull (oss-sec). The advisory is shared for download at openwall.com. This vulnerability was named CVE-2015-7225 since 09/17/2015. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1211.

The vulnerability was handled as a non-public zero-day exploit for at least 720 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 76789†). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Tinfoil

Name

• Devise-two-factor

Version

• 2.0

Website

• Product: https://github.com/tinfoil/devise-two-factor/

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Once again VulDB remains the best source for vulnerability data.

Discussion