Horizon Alert
Summary of the vulnerability and why it matters
This advisory highlights a critical vulnerability in SOGo, a groupware solution, where a misconfiguration can allow unauthenticated attackers to bypass password checks and access user accounts. This could expose sensitive information within those accounts.
- Password bypass allows unauthorized account access.
- Exposes sensitive user information and services.
- Confirm relevance and assess potential exposure.
Attack Path
How an attacker could exploit the issue
An attacker could bypass SOGo's HTTP Basic authentication by sending a request with an existing user's username and any password when the `SogoTrustProxyAuthentication` parameter is incorrectly configured. This allows the attacker to log in to the targeted user's account.
- Network access required.
- Bypasses HTTP Basic authentication.
- Account takeover.
Live Threat
Current exploitation, exposure, and threat context
When SOGo is configured with `SogoTrustProxyAuthentication=YES`, an unauthenticated attacker could bypass HTTP Basic authentication by providing a valid username and any password to log into a user's account. This could expose user account data and service functionality to unauthorized access.
- User account data and service functionality.
- Bypassing authentication with valid username.
- Unauthorized access to user accounts.
Operational Fix
Recommended remediation, mitigation, and detection steps
This critical vulnerability bypasses authentication, allowing unauthorized access to user accounts. The primary responsibility for addressing this lies with the platform or infrastructure team managing SOGo, in coordination with security teams to assess and mitigate exposure. The initial step is to identify all SOGo instances, confirm their accessibility and criticality, and then plan remediation based on the identified risk.
- Platform or infrastructure teams own the issue.
- Verify SOGo instance accessibility and criticality.
- Plan remediation based on assessed risk.
