Firefly III up to 6.1.16 MFA improper authentication

Summaryinfo

A vulnerability was found in Firefly III up to 6.1.16. It has been classified as critical. The impacted element is an unknown function of the component MFA. The manipulation leads to improper authentication. This vulnerability is uniquely identified as CVE-2024-37893. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Firefly III up to 6.1.16. It has been rated as problematic. This issue affects an unknown code block of the component MFA. The manipulation with an unknown input leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is confidentiality. The summary by CVE is:

Firefly III is a free and open source personal finance manager. In affected versions an MFA bypass in the Firefly III OAuth flow may allow malicious users to bypass the MFA-check. This allows malicious users to use password spraying to gain access to Firefly III data using passwords stolen from other sources. As OAuth applications are easily enumerable using an incrementing id, an attacker could try sign an OAuth application up to a users profile quite easily if they have created one. The attacker would also need to know the victims username and password. This problem has been patched in Firefly III v6.1.17 and up. Users are advised to upgrade. Users unable to upgrade should Use a unique password for their Firefly III instance and store their password securely, i.e. in a password manager.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2024-37893 since 06/10/2024. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 6.1.17 eliminates this vulnerability.

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Productinfo

Name

• Firefly III

Version

• 6.1.0
• 6.1.1
• 6.1.2
• 6.1.3
• 6.1.4
• 6.1.5
• 6.1.6
• 6.1.7
• 6.1.8
• 6.1.9
• 6.1.10
• 6.1.11
• 6.1.12
• 6.1.13
• 6.1.14
• 6.1.15
• 6.1.16

CPE 2.3info

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CPE 2.2info

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