CVE-2017-12754 : Exploit Details and Defense Strategies

A stack buffer overflow vulnerability in the httpd component of Asuswrt-Merlin firmware versions 380.67_0RT-AC5300 and earlier for ASUS devices allows remote code execution on routers.

Understanding CVE-2017-12754

This CVE identifies a critical security issue in Asuswrt-Merlin firmware that could be exploited by attackers to run arbitrary code on affected ASUS routers.

What is CVE-2017-12754?

A stack buffer overflow vulnerability in the httpd component of Asuswrt-Merlin firmware versions 380.67_0RT-AC5300 and earlier for ASUS devices allows remote attackers to execute arbitrary code on the targeted router by sending a specially crafted HTTP GET request packet.

The Impact of CVE-2017-12754

Attackers can remotely execute arbitrary code on ASUS routers, compromising their security and potentially gaining unauthorized access.

Technical Details of CVE-2017-12754

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability arises from a stack buffer overflow in the httpd component of Asuswrt-Merlin firmware versions 380.67_0RT-AC5300 and earlier for ASUS devices.

Affected Systems and Versions

Asuswrt-Merlin firmware versions 380.67_0RT-AC5300 and earlier for ASUS devices such as RT-AC5300, RT_AC1900P, RT-AC68U, and more are impacted.

Exploitation Mechanism

Exploitation involves sending a specially crafted HTTP GET request packet with a lengthy delete_offline_client parameter in the URL to trigger the vulnerability.

Mitigation and Prevention

Protecting systems from CVE-2017-12754 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update affected ASUS routers to the latest firmware version provided by the vendor.
Implement network segmentation to minimize the impact of potential attacks.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update firmware and security patches on all network devices.
Conduct security audits and penetration testing to identify and address vulnerabilities.

Patching and Updates

Regularly check for firmware updates and security advisories from ASUS to patch known vulnerabilities and enhance system security.