CVE-2019-8985 : What You Need to Know
Learn about CVE-2019-8985, a critical stack-based buffer overflow vulnerability affecting Netis WF2411 routers and other WF2xxx devices. Find out the impact, affected systems, exploitation method, and mitigation steps.
A stack-based buffer overflow vulnerability exists on Netis WF2411 routers and other Netis WF2xxx devices, potentially leading to denial of service or remote code execution.
Understanding CVE-2019-8985
This CVE involves a critical security issue on specific Netis routers that can be exploited without authentication, posing serious risks to device security.
What is CVE-2019-8985?
The vulnerability allows attackers to trigger a buffer overflow by sending a specially crafted HTTP request, potentially leading to a denial of service (device reboot) or remote code execution.
The Impact of CVE-2019-8985
Exploiting this vulnerability can result in severe consequences, including unauthorized device restarts or the execution of malicious code by remote attackers.
Technical Details of CVE-2019-8985
This section provides more in-depth technical insights into the vulnerability.
Vulnerability Description
The vulnerability is a stack-based buffer overflow that occurs in the user_auth->user_ok function in the /bin/boa directory of Netis WF2411 routers and other WF2xxx devices. It can be triggered by sending a GET request with a long HTTP "Authorization: Basic" header.
Affected Systems and Versions
- Netis WF2411 with firmware 2.1.36123
- Other Netis WF2xxx devices, possibly WF2411 through WF2880
Exploitation Mechanism
The vulnerability is exploited by sending a GET request with an excessively long HTTP "Authorization: Basic" header, which is mishandled by the user_auth->user_ok function in the /bin/boa directory.
Mitigation and Prevention
Protecting systems from CVE-2019-8985 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Disable remote access if not required
- Implement network segmentation to limit exposure
- Monitor network traffic for suspicious activities
Long-Term Security Practices
- Regularly update firmware and security patches
- Conduct security assessments and penetration testing
- Educate users on safe browsing habits and security best practices
Patching and Updates
- Check for firmware updates from Netis for the affected devices
- Apply patches promptly to mitigate the vulnerability and enhance device security