CVE-2021-44415 : What You Need to Know
Learn about CVE-2021-44415, a denial of service vulnerability in the cgiserver.cgi JSON command parser of reolink RLC-410W v3.0.0.136_20121102. Understand the impact, technical details, and mitigation steps.
A denial of service vulnerability exists in the cgiserver.cgi JSON command parser functionality of reolink RLC-410W v3.0.0.136_20121102. This vulnerability allows an attacker to trigger a reboot by sending a specially-crafted HTTP request.
Understanding CVE-2021-44415
This CVE highlights a denial of service vulnerability with a high severity base score.
What is CVE-2021-44415?
The vulnerability is due to improper input validation in the ModifyUser parameter of the cgiserver.cgi JSON command parser of the affected device. An attacker can exploit this by sending a malicious HTTP request.
The Impact of CVE-2021-44415
The base severity of this vulnerability is high, with a CVSS base score of 8.6. Successful exploitation can result in a denial of service leading to a system reboot.
Technical Details of CVE-2021-44415
This section dives into the technical aspects of the vulnerability.
Vulnerability Description
The issue lies in the cgiserver.cgi JSON command parser of the reolink RLC-410W v3.0.0.136_20121102. When a specially-crafted HTTP request is sent, it can trigger a reboot due to improper input validation in the ModifyUser parameter.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Version: RLC-410W v3.0.0.136_20121102
Exploitation Mechanism
- Attack Complexity: Low
- Attack Vector: Network
- Privileges Required: None
- User Interaction: None
- Scope: Changed
- Availability Impact: High
- Vector String: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Mitigation and Prevention
It is crucial to take immediate action to mitigate the risks associated with this vulnerability.
Immediate Steps to Take
- Apply vendor-supplied patches or updates promptly.
- Restrict network access to the affected device.
- Monitor network traffic for any suspicious activity.
Long-Term Security Practices
- Regularly update and patch all software and firmware.
- Conduct security assessments and penetration testing periodically.
Patching and Updates
- Check for security advisories from the vendor.
- Apply patches or updates to address the vulnerability promptly.