ory kratos up to 1.2.x available_aal information disclosure

Summaryinfo

A vulnerability was found in ory kratos up to 1.2.x and classified as problematic. The impacted element is an unknown function. The manipulation of the argument available_aal results in information disclosure. This vulnerability is cataloged as CVE-2024-45042. The attack may be launched remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in ory kratos up to 1.2.x. Affected is an unknown code. The manipulation of the argument available_aal with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. CVE summarizes:

Ory Kratos is an identity, user management and authentication system for cloud services. Prior to version 1.3.0, given a number of preconditions, the `highest_available` setting will incorrectly assume that the identity’s highest available AAL is `aal1` even though it really is `aal2`. This means that the `highest_available` configuration will act as if the user has only one factor set up, for that particular user. This means that they can call the settings and whoami endpoint without a `aal2` session, even though that should be disallowed. An attacker would need to steal or guess a valid login OTP of a user who has only OTP for login enabled and who has an incorrect `available_aal` value stored, to exploit this vulnerability. All other aspects of the session (e.g. the session’s aal) are not impacted by this issue. On the Ory Network, only 0.00066% of registered users were affected by this issue, and most of those users appeared to be test users. Their respective AAL values have since been updated and they are no longer vulnerable to this attack. Version 1.3.0 is not affected by this issue. As a workaround, those who require MFA should disable the passwordless code login method. If that is not possible, check the sessions `aal` to identify if the user has `aal1` or `aal2`.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2024-45042 since 08/21/2024. The exploitability is told to be difficult. It is possible to launch the attack remotely. Additional levels of successful authentication are needed for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

Upgrading to version 1.3.0 eliminates this vulnerability.

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Productinfo

Vendor

• ory

Name

• kratos

Version

• 1.0
• 1.1
• 1.2

Website

• Product: https://github.com/ory/kratos/

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