CVE-2019-15699 : Exploit Details and Defense Strategies
Learn about CVE-2019-15699, a vulnerability in Suricata 4.1.4 that allows attackers to exploit memory corruption via SSLv3 packets. Find mitigation steps and prevention measures here.
A vulnerability has been identified in Suricata 4.1.4 that allows attackers to exploit a memory corruption issue when processing SSLv3 (TLS 1.2) packets.
Understanding CVE-2019-15699
This CVE involves a vulnerability in Suricata 4.1.4 that can be exploited by sending a corrupted SSLv3 (TLS 1.2) packet, leading to a memory access issue.
What is CVE-2019-15699?
The vulnerability in Suricata 4.1.4 allows attackers to trigger a memory corruption issue by sending a specifically crafted SSLv3 (TLS 1.2) packet. This results in an attempt to access an unallocated memory region due to a mismatch in the expected and actual lengths of the packet.
The Impact of CVE-2019-15699
Exploiting this vulnerability could potentially lead to a denial of service (DoS) condition or arbitrary code execution on the affected system.
Technical Details of CVE-2019-15699
This section provides more in-depth technical details about the CVE.
Vulnerability Description
The vulnerability in Suricata 4.1.4 occurs in the file app-layer-ssl.c when processing corrupted SSLv3 (TLS 1.2) packets. The parser function attempts to access an unallocated memory region due to a discrepancy in the expected and actual lengths of the packet.
Affected Systems and Versions
- Suricata 4.1.4
Exploitation Mechanism
Attackers can exploit this vulnerability by sending a specially crafted SSLv3 (TLS 1.2) packet to the target system, triggering the memory corruption issue.
Mitigation and Prevention
To address CVE-2019-15699, follow these mitigation strategies:
Immediate Steps to Take
- Update Suricata to version 4.1.5 or later to patch the vulnerability.
- Monitor network traffic for any signs of exploitation.
Long-Term Security Practices
- Regularly update and patch all software and systems to prevent known vulnerabilities.
- Implement network segmentation to limit the impact of potential attacks.
Patching and Updates
- Apply security updates and patches promptly to ensure the system is protected against known vulnerabilities.