CVE-2020-18976 Explained : Impact and Mitigation
Learn about CVE-2020-18976, a Buffer Overflow vulnerability in Tcpreplay v4.3.2 that allows attackers to cause a Denial of Service by exploiting the 'do_checksum' function in 'checksum.c'. Find out how to mitigate this issue.
Tcpreplay v4.3.2 is vulnerable to a Buffer Overflow, allowing attackers to execute a Denial of Service attack by exploiting the 'do_checksum' function in 'checksum.c' when a crafted pcap file is sent to the 'tcpreplay-edit' binary.
Understanding CVE-2020-18976
This CVE describes a specific vulnerability in Tcpreplay v4.3.2 that can be exploited to cause a Denial of Service.
What is CVE-2020-18976?
The vulnerability in Tcpreplay v4.3.2 enables attackers to trigger a Buffer Overflow by manipulating the 'do_checksum' function in 'checksum.c' through a specially crafted pcap file.
The Impact of CVE-2020-18976
The exploitation of this vulnerability can result in a Denial of Service condition, affecting the availability of the system and potentially disrupting network operations.
Technical Details of CVE-2020-18976
Tcpreplay v4.3.2 vulnerability details.
Vulnerability Description
The vulnerability allows attackers to exploit a Buffer Overflow in the 'do_checksum' function of 'checksum.c' by sending a malicious pcap file to the 'tcpreplay-edit' binary.
Affected Systems and Versions
- Product: Tcpreplay v4.3.2
- Vendor: N/A
- Version: N/A
Exploitation Mechanism
The vulnerability can be exploited by sending a specifically crafted pcap file to the 'tcpreplay-edit' binary, triggering the Buffer Overflow.
Mitigation and Prevention
Protecting systems from CVE-2020-18976.
Immediate Steps to Take
- Apply security patches or updates provided by the vendor.
- Implement network monitoring to detect unusual traffic patterns.
- Restrict network access to vulnerable services.
Long-Term Security Practices
- Conduct regular security assessments and penetration testing.
- Educate users and administrators on secure network practices.
- Keep software and systems up to date with the latest security patches.
- Employ intrusion detection and prevention systems.
- Consider network segmentation to limit the impact of potential attacks.
Patching and Updates
Ensure that Tcpreplay v4.3.2 is updated with the latest patches to mitigate the vulnerability.