CVE-2018-18708 : Security Advisory and Response
Learn about CVE-2018-18708, a buffer overflow vulnerability in Tenda routers AC7, AC9, AC10, AC15, and AC18, allowing attackers to manipulate function return addresses. Find mitigation steps here.
A buffer overflow vulnerability was found in the web servers of Tenda AC7 V15.03.06.44_CN, AC9 V15.03.05.19(6318)_CN, AC10 V15.03.06.23_CN, AC15 V15.03.05.19_CN, and AC18 V15.03.05.19(6318)_CN devices, allowing attackers to override the return address of the function.
Understanding CVE-2018-18708
This CVE involves a buffer overflow vulnerability in specific Tenda router models, potentially leading to a security compromise.
What is CVE-2018-18708?
This vulnerability arises from the mishandling of the "page" parameter in the "fromAddressNat" function of the affected Tenda routers, enabling attackers to manipulate the return address of the function.
The Impact of CVE-2018-18708
The exploitation of this vulnerability could result in unauthorized access, data breaches, and potential control over the affected devices by malicious actors.
Technical Details of CVE-2018-18708
This section delves into the technical aspects of the CVE.
Vulnerability Description
The vulnerability occurs due to the direct utilization of the "page" parameter in a sprintf function, leading to a buffer overflow that can be exploited by attackers.
Affected Systems and Versions
- Tenda AC7 V15.03.06.44_CN
- Tenda AC9 V15.03.05.19(6318)_CN
- Tenda AC10 V15.03.06.23_CN
- Tenda AC15 V15.03.05.19_CN
- Tenda AC18 V15.03.05.19(6318)_CN
Exploitation Mechanism
Attackers can craft malicious requests containing specially crafted values for the "page" parameter, triggering the buffer overflow and potentially gaining control over the affected devices.
Mitigation and Prevention
Protecting systems from CVE-2018-18708 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply security patches provided by Tenda promptly.
- Implement network segmentation to limit the impact of potential attacks.
- Monitor network traffic for any suspicious activities.
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
Ensure that all Tenda router models mentioned are updated with the latest firmware versions to mitigate the risk of exploitation.