CVE-2018-21135 : What You Need to Know
Learn about CVE-2018-21135, a vulnerability allowing authenticated users to trigger a stack-based buffer overflow in NETGEAR devices. Find out the impacted systems and mitigation steps.
An authenticated user can exploit a stack-based buffer overflow vulnerability in certain NETGEAR devices including R6700, R7500, R7800, R8900, R9000, WNDR3700v4, WNDR4300v1, WNDR4300v2, WNDR4500v3, and WNR2000v5-R2000.
Understanding CVE-2018-21135
This CVE involves a stack-based buffer overflow vulnerability in specific NETGEAR devices.
What is CVE-2018-21135?
A stack-based buffer overflow vulnerability allows an authenticated user to execute arbitrary code on affected NETGEAR devices.
The Impact of CVE-2018-21135
- CVSS Base Score: 6.8 (Medium)
- Attack Vector: Adjacent Network
- Attack Complexity: Low
- Privileges Required: High
- Confidentiality Impact: High
- Integrity Impact: High
- Availability Impact: High
- Scope: Unchanged
- User Interaction: None
Technical Details of CVE-2018-21135
This section provides more in-depth technical information about the vulnerability.
Vulnerability Description
The vulnerability allows an authenticated user to trigger a stack-based buffer overflow on the affected NETGEAR devices.
Affected Systems and Versions
The following devices are impacted:
- R6700 (before version 1.0.1.48)
- R7500 (before version 1.0.0.124)
- R7800 (before version 1.0.2.58)
- R8900 (before version 1.0.4.2)
- R9000 (before version 1.0.4.2)
- WNDR3700v4 (before version 1.0.2.102)
- WNDR4300v1 (before version 1.0.2.104)
- WNDR4300v2 (before version 1.0.0.56)
- WNDR4500v3 (before version 1.0.0.56)
- WNR2000v5-R2000 (before version 1.0.0.68)
Exploitation Mechanism
The vulnerability can be exploited by an authenticated user to execute malicious code on the affected devices.
Mitigation and Prevention
Steps to address and prevent the CVE-2018-21135 vulnerability.
Immediate Steps to Take
- Update the firmware of the affected devices to the latest versions provided by NETGEAR.
- Monitor network traffic for any signs of exploitation.
Long-Term Security Practices
- Regularly update firmware and software to patch known vulnerabilities.
- Implement strong authentication mechanisms to prevent unauthorized access.
Patching and Updates
- NETGEAR has released updated firmware versions that address the stack-based buffer overflow vulnerability.