Horizon Alert
Summary of the vulnerability and why it matters
This advisory concerns a vulnerability in AVideo affecting its account activation and login processes. The issue stems from the use of a predictable random number generator, which could allow an unauthenticated attacker to bypass standard authentication and take over user accounts by guessing a valid activation or login code. This could expose user data and grant unauthorized access.
- Predictable codes allow account takeover.
- Important for systems handling user access.
- Confirm relevance and check for exposure.
Attack Path
How an attacker could exploit the issue
An unauthenticated attacker can target a publicly accessible API endpoint to guess a weak activation or login code. Once a valid code is guessed, the attacker can obtain an account's email and a long-lasting credential that bypasses password authentication, leading to account takeover.
- Entry condition: Publicly accessible API endpoint.
- Trigger point: Guessing a weak login code.
- Resulting risk: Account takeover via credential bypass.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability could allow an unauthenticated attacker to take over user accounts. An attacker can repeatedly guess account activation or login codes, which are generated using a predictable method. If an attacker successfully guesses a valid code, they can obtain the target account's email address and a credential that bypasses password requirements for a year, leading to account takeover.
- Account email addresses and year-long access credentials.
- Guessing weak login codes via an unauthenticated API.
- Account takeover by an unauthenticated remote attacker.
Operational Fix
Recommended remediation, mitigation, and detection steps
This vulnerability in AVideo impacts systems where the application is exposed externally. The first practical step is to identify all AVideo instances, assess their business criticality and reachability, and locate the accountable owner for remediation planning.
- Application owners should lead remediation efforts.
- Verify external accessibility of AVideo instances.
- Plan vendor coordination for mitigation.
