CVE-2019-20754 : Exploit Details and Defense Strategies

A buffer overflow vulnerability has been discovered in certain NETGEAR devices when accessed by an authorized user. The affected models include DGN2200, DGN2200B, D8500, D7000v2, D6400, D6220, EX7000, EX6200, EX6150, EX7500, JNDR3000, R8000, R8500, R8300, R7900P, R8000P, R7900, R7000P, R7300DST, R7100LG, R6900P, R7000, R6900, R6700, R6400v2, R6400, R6300v2, R6250, WNDR4500v2, and WNR3500Lv2.

Understanding CVE-2019-20754

This CVE identifies a buffer overflow vulnerability in specific NETGEAR devices that can be exploited by an authenticated user.

What is CVE-2019-20754?

A buffer overflow vulnerability has been found in certain NETGEAR devices when accessed by an authorized user. Multiple models are affected, allowing potential attackers to exploit this vulnerability.

The Impact of CVE-2019-20754

CVSS Base Score: 6.8 (Medium)
Attack Vector: Adjacent Network
Attack Complexity: Low
Privileges Required: High
User Interaction: None
Confidentiality, Integrity, and Availability Impact: High
Scope: Unchanged

Technical Details of CVE-2019-20754

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability is a buffer overflow issue that arises when an authenticated user interacts with certain NETGEAR devices.

Affected Systems and Versions

The following models are affected:

DGN2200 (versions prior to 1.0.0.58)
DGN2200B (versions prior to 1.0.0.58)
D8500 (versions prior to 1.0.3.42)
D7000v2 (versions prior to 1.0.0.51)
D6400 (versions prior to 1.0.0.80)
and more...

Exploitation Mechanism

The vulnerability can be exploited by an authenticated user to trigger a buffer overflow, potentially leading to unauthorized access or denial of service.

Mitigation and Prevention

Protecting systems from CVE-2019-20754 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update affected devices to the latest firmware versions provided by NETGEAR.
Implement strong access controls and restrict network access to trusted users only.

Long-Term Security Practices

Regularly monitor for security advisories and updates from NETGEAR.
Conduct security assessments and penetration testing to identify and address vulnerabilities proactively.

Patching and Updates

Apply patches and updates promptly to ensure that known vulnerabilities are mitigated effectively.