CVE-2021-41054 : Exploit Details and Defense Strategies
Learn about CVE-2021-41054, a buffer overflow flaw in atftp up to 0.7.4, potentially allowing attackers to execute arbitrary code or cause denial of service. Find mitigation steps here.
CVE-2021-41054 involves a buffer overflow vulnerability in atftp through version 0.7.4 due to inadequate buffer size handling. This vulnerability can be exploited by combining data, OACK, and other options, potentially leading to security breaches.
Understanding CVE-2021-41054
What is CVE-2021-41054?
CVE-2021-41054 is a vulnerability in the atftp software up to version 0.7.4 that allows for a buffer overflow due to insufficient consideration of buffer size when handling data, OACK, and other options.
The Impact of CVE-2021-41054
This vulnerability can be exploited by attackers to cause a buffer overflow in affected systems, potentially leading to arbitrary code execution or denial of service.
Technical Details of CVE-2021-41054
Vulnerability Description
The vulnerability exists in the tftpd_file.c component of atftp through version 0.7.4, where the buffer overflow is triggered by inadequate buffer-size handling.
Affected Systems and Versions
- Product: N/A
- Vendor: N/A
- Versions: Up to 0.7.4
Exploitation Mechanism
Attackers can exploit this vulnerability by sending specially crafted data, OACK, and other options to trigger the buffer overflow.
Mitigation and Prevention
Immediate Steps to Take
- Apply the security update provided by atftp to patch the vulnerability.
- Monitor network traffic for any signs of exploitation.
- Consider restricting network access to affected systems.
Long-Term Security Practices
- Regularly update software to the latest versions to mitigate known vulnerabilities.
- Implement network segmentation to limit the impact of potential attacks.
Patching and Updates
Ensure that all systems running atftp are updated to version 0.7.5 or later which contains the necessary patches.