CVE-2019-10050 : What You Need to Know

Suricata 4.1.x before version 4.1.4 has a buffer over-read vulnerability that can be exploited by attackers to manipulate control flow, leading to a crash.

Understanding CVE-2019-10050

What is CVE-2019-10050?

A buffer over-read vulnerability in Suricata 4.1.x before 4.1.4 allows attackers to cause a crash by manipulating the control flow.

The Impact of CVE-2019-10050

This vulnerability can be exploited to alter the network packet length, potentially leading to a system crash.

Technical Details of CVE-2019-10050

Vulnerability Description

The vulnerability is located in the decode-mpls.c function DecodeMPLS, where an attacker can make the loop exit condition true, resulting in a network packet length of 2 bytes without validation, leading to a crash.

Affected Systems and Versions

Product: Suricata
Vendor: N/A
Versions affected: Suricata 4.1.x before 4.1.4

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the control flow to exit the loop, causing the network packet length to become 2 bytes without proper validation, resulting in a crash.

Mitigation and Prevention

Immediate Steps to Take

Update Suricata to version 4.1.4 or later to mitigate this vulnerability.
Monitor vendor communications for any patches or workarounds.

Long-Term Security Practices

Regularly update and patch all software to prevent known vulnerabilities.
Implement network segmentation and access controls to limit the impact of potential attacks.

Patching and Updates

Ensure that Suricata is kept up to date with the latest security patches and updates to protect against known vulnerabilities.