Horizon Alert
Summary of the vulnerability and why it matters
This advisory concerns a vulnerability in Tenda AC15 wireless routers that could allow unauthorized access to protected resources by exposing account password hashes and using easily guessable session identifiers. An attacker with network access or the ability to run JavaScript in a victim's browser could potentially steal a session cookie and impersonate a legitimate user.
- Weaknesses in session handling can expose sensitive information.
- Protects network access, a common attack vector.
- Confirm relevance and assess potential exposure.
Attack Path
How an attacker could exploit the issue
An attacker could gain access to a Tenda AC15 router, potentially by running malicious JavaScript in a user's browser or by being on the same network. This allows them to steal a specially crafted authentication cookie. The router then incorrectly uses this stolen cookie to grant the attacker access to protected administrative functions, bypassing normal login requirements.
- Attacker needs network access or code execution.
- Stolen authentication cookie is replayed.
- Unauthorized access to router functions.
Live Threat
Current exploitation, exposure, and threat context
A vulnerability in Tenda AC15 firmware could allow an attacker to gain access to protected resources by stealing an authentication cookie. This could occur when an attacker has network access or can execute JavaScript in a user's browser. The affected cookie exposes the account password hash and uses a weak session identifier, making it easier to compromise.
- Router administration access at risk.
- Cookie theft via network or JS.
- Unauthorized access to device functions.
Operational Fix
Recommended remediation, mitigation, and detection steps
Determining precise ownership for this router vulnerability requires understanding your specific network architecture and device management policies. Typically, the infrastructure or network team would be accountable for managing edge devices like this Tenda router. The immediate first step is to identify all instances of this device, confirm their exposure to untrusted networks, and then assign ownership for remediation based on the identified risk and business criticality.
- Infrastructure or network team ownership.
- Verify device exposure and criticality.
- Plan remediation based on risk.
