CVE-2019-11937 : Vulnerability Insights and Analysis

A vulnerability in Mcrouter versions prior to v0.41.0 could lead to stack exhaustion and denial of service when processing large struct inputs.

Understanding CVE-2019-11937

This CVE involves uncontrolled resource consumption in Mcrouter, a product by Facebook.

What is CVE-2019-11937?

In Mcrouter versions before v0.41.0, a specific input scenario could cause stack exhaustion and denial of service due to a Carbon protocol reader processing large struct inputs.

The Impact of CVE-2019-11937

The vulnerability could be exploited to exhaust the stack and potentially lead to denial of service attacks on affected systems.

Technical Details of CVE-2019-11937

This section provides detailed technical insights into the CVE.

Vulnerability Description

The issue arises in Mcrouter versions prior to v0.41.0 when a Carbon protocol reader receives a large struct input, leading to stack exhaustion and denial of service.

Affected Systems and Versions

Product: Mcrouter
Vendor: Facebook
Affected Versions:
0.41.0
Versions less than 0.41.0 (custom versions)

Exploitation Mechanism

The vulnerability is triggered by providing a large struct input to the Carbon protocol reader in Mcrouter versions before v0.41.0.

Mitigation and Prevention

Protecting systems from CVE-2019-11937 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Mcrouter to version 0.41.0 or newer to mitigate the vulnerability.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

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

Patching and Updates

Facebook has released version 0.41.0 to address the vulnerability. Ensure timely patching of Mcrouter to the latest secure version.