CVE-2019-8313 : Security Advisory and Response
Learn about CVE-2019-8313, a Command Injection vulnerability in D-Link DIR-878 devices allowing remote code execution. Find mitigation steps and long-term security practices here.
A Command Injection vulnerability in the firmware 1.12A1 of D-Link DIR-878 devices allows remote attackers to execute unauthorized code and gain root shell access.
Understanding CVE-2019-8313
This CVE involves a critical security issue in D-Link DIR-878 devices that can be exploited by attackers to execute arbitrary commands.
What is CVE-2019-8313?
The vulnerability enables attackers to execute OS commands through a specially crafted /HNAP1 POST request, leading to unauthorized code execution and root shell access.
The Impact of CVE-2019-8313
- Remote attackers can exploit the Command Injection vulnerability to execute unauthorized code on affected devices.
- Unauthorized access to a root shell can compromise the security and integrity of the device.
Technical Details of CVE-2019-8313
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The flaw arises when untrusted input from the request body triggers the twsystem function for the SetIPv6FirewallSettings API function, allowing attackers to execute arbitrary OS commands.
Affected Systems and Versions
- Product: D-Link DIR-878
- Firmware Version: 1.12A1
Exploitation Mechanism
Attackers can exploit the vulnerability by using shell metacharacters in the SrcIPv6AddressRangeStart field of the HNAP API function.
Mitigation and Prevention
Protecting systems from CVE-2019-8313 requires immediate action and long-term security measures.
Immediate Steps to Take
- Apply security patches provided by D-Link to mitigate the vulnerability.
- Implement network segmentation to limit the impact of potential attacks.
- Monitor network traffic for any suspicious activity.
Long-Term Security Practices
- Regularly update firmware and software to address security vulnerabilities.
- Conduct security assessments and penetration testing to identify and remediate weaknesses.
Patching and Updates
- Stay informed about security advisories from D-Link and apply patches promptly to secure the devices.