CVE-2019-16410 : What You Need to Know

A vulnerability has been identified in Suricata 4.1.4 that can lead to accessing unallocated memory due to a lack of header_len checking when multiple fragmented IPv4 packets are sent.

Understanding CVE-2019-16410

This CVE involves a flaw in Suricata 4.1.4 that could be exploited by sending multiple fragmented IPv4 packets.

What is CVE-2019-16410?

The vulnerability in Suricata 4.1.4 arises from the function Defrag4Reassemble in defrag.c attempting to access an unallocated memory region due to the absence of header_len checking.

The Impact of CVE-2019-16410

The vulnerability could potentially allow attackers to execute arbitrary code or cause a denial of service by exploiting the memory access issue.

Technical Details of CVE-2019-16410

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The flaw in Suricata 4.1.4 allows attackers to access unallocated memory by sending multiple fragmented IPv4 packets, exploiting the Defrag4Reassemble function.

Affected Systems and Versions

Affected Version: Suricata 4.1.4
Other versions may also be impacted if they use the same function and lack the necessary header_len checking.

Exploitation Mechanism

Attackers can exploit this vulnerability by sending multiple fragmented IPv4 packets, triggering the function Defrag4Reassemble to access unallocated memory.

Mitigation and Prevention

Protecting systems from CVE-2019-16410 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Suricata to the latest version that includes a patch for this vulnerability.
Implement network-level protections to detect and block malicious fragmented packets.

Long-Term Security Practices

Regularly monitor and update intrusion detection and prevention systems.
Conduct security audits to identify and address potential vulnerabilities in network security.

Patching and Updates

Apply patches provided by Suricata to fix the vulnerability.
Stay informed about security advisories and updates from Suricata to address any future vulnerabilities.