CVE-2019-10055 : What You Need to Know
Learn about CVE-2019-10055, a vulnerability in Suricata 4.1.3 that allows attackers to crash the application via FTP responses. Find mitigation steps and preventive measures here.
Suricata 4.1.3 has a vulnerability in the function ftp_pasv_response that can lead to a crash due to a lack of verification for the length of part1 and part2 in the ftp/mod.rs file.
Understanding CVE-2019-10055
This CVE entry highlights a specific vulnerability in Suricata 4.1.3 related to FTP response handling.
What is CVE-2019-10055?
CVE-2019-10055 is a vulnerability in Suricata 4.1.3 that arises from inadequate length verification in the ftp_pasv_response function, potentially resulting in a crash within the ftp/mod.rs file.
The Impact of CVE-2019-10055
The vulnerability can be exploited to cause a denial of service (DoS) by crashing the Suricata application, affecting the availability of the system.
Technical Details of CVE-2019-10055
This section delves into the technical aspects of the vulnerability.
Vulnerability Description
The issue in Suricata 4.1.3 stems from the lack of length verification for part1 and part2 in the ftp_pasv_response function, leading to a crash within the ftp/mod.rs file.
Affected Systems and Versions
- Affected Version: Suricata 4.1.3
- Systems: Suricata installations using the affected version
Exploitation Mechanism
Attackers can exploit this vulnerability by sending specially crafted FTP responses to trigger the crash in the Suricata application.
Mitigation and Prevention
Protecting systems from CVE-2019-10055 requires immediate actions and long-term security measures.
Immediate Steps to Take
- Update Suricata to a patched version that addresses the FTP response handling issue.
- Monitor network traffic for any suspicious FTP activity that could indicate exploitation attempts.
Long-Term Security Practices
- Regularly update Suricata and other security software to mitigate known vulnerabilities.
- Implement network segmentation to limit the impact of potential attacks on critical systems.
Patching and Updates
Ensure timely application of security patches and updates provided by Suricata to address CVE-2019-10055 and other vulnerabilities.