CVE-2022-46177 : Vulnerability Insights and Analysis

Discourse password reset link can lead to an account takeover if the user changes to a new email.

Understanding CVE-2022-46177

This CVE affects Discourse, an open-source discussion platform, where a vulnerability existed prior to version 2.8.14 on the

stable

branch and version 3.0.0.beta16 on the

beta

and

tests-passed

branches.

What is CVE-2022-46177?

CVE-2022-46177 is a vulnerability in Discourse that allows an attacker to take over a user account by exploiting the password reset mechanism. When a user requests a password reset link email, changes their primary email, and then uses the old reset email, the account's primary email can be re-linked to the old email, leading to an account takeover.

The Impact of CVE-2022-46177

The impact of this vulnerability is high, with confidentiality and integrity impacts rated as high. It requires high privileges to exploit and user interaction is required. However, the availability impact is none.

Technical Details of CVE-2022-46177

This CVE has a CVSSv3.1 base score of 5.7, indicating a medium severity vulnerability with high attack complexity and the need for user interaction.

Vulnerability Description

The vulnerability arises from insufficient session expiration, allowing the reuse of old password reset links after a primary email change.

Affected Systems and Versions

Users of Discourse versions prior to 2.8.14 and 3.0.0.beta16 are affected by this vulnerability.

Exploitation Mechanism

By exploiting the password reset link email and changing the primary email, an attacker can take over the user's account.

Mitigation and Prevention

It is crucial for users to take immediate steps to prevent exploitation and ensure long-term security practices.

Immediate Steps to Take

Users should upgrade to versions 2.8.14 or 3.0.0.beta15 to receive a patch for this vulnerability. Additionally, they can lower the

email_token_valid_hours

as a temporary workaround.

Long-Term Security Practices

Implement strong password policies, utilize 2-factor authentication, and regularly update the Discourse platform to the latest versions.

Patching and Updates

Stay informed about security updates and promptly apply patches released by Discourse to mitigate any potential risks.