CVE-2017-11519 : Exploit Details and Defense Strategies

In the TP-Link Archer C9(UN)_V2_160517 firmware, a vulnerability in the passwd_recovery.lua script allows a malicious actor to reset the administrator password due to a predictable random number generator seed. This issue has been resolved in the C9(UN)_V2_170511 firmware update.

Understanding CVE-2017-11519

This CVE entry describes a security vulnerability in the TP-Link Archer C9(UN)_V2_160517 firmware that enables unauthorized password resets.

What is CVE-2017-11519?

The vulnerability in the passwd_recovery.lua script of the TP-Link Archer C9(UN)_V2_160517 firmware allows an attacker to reset the admin password by exploiting a predictable random number generator seed. This flaw has been fixed in the C9(UN)_V2_170511 firmware update.

The Impact of CVE-2017-11519

The exploitation of this vulnerability could lead to unauthorized access to the administrator account of the affected device, compromising its security and potentially allowing for further malicious activities.

Technical Details of CVE-2017-11519

This section provides more in-depth technical information about the vulnerability.

Vulnerability Description

The vulnerability arises from the use of a predictable random number generator seed in the passwd_recovery.lua script, enabling an attacker to reset the administrator password.

Affected Systems and Versions

Affected System: TP-Link Archer C9(UN)_V2_160517 firmware
Resolved in: C9(UN)_V2_170511 firmware update

Exploitation Mechanism

The vulnerability can be exploited by leveraging the predictable random number generator seed to reset the administrator password.

Mitigation and Prevention

Protecting systems from CVE-2017-11519 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update the firmware to the latest version (C9(UN)_V2_170511) to mitigate the vulnerability.
Change the default administrator password to a strong, unique one.

Long-Term Security Practices

Regularly update firmware and security patches to address known vulnerabilities.
Implement strong password policies and multi-factor authentication to enhance security.
Conduct security audits and assessments to identify and remediate potential weaknesses.
Monitor network traffic and system logs for any suspicious activities.

Patching and Updates

Ensure that all devices running the TP-Link Archer C9(UN)_V2_160517 firmware are updated to the latest version (C9(UN)_V2_170511) to eliminate the vulnerability.