CVE-2018-20353 : Security Advisory and Response

The Cesanta Mongoose Embedded Web Server Library version 6.13 and earlier are susceptible to a denial of service attack or remote code execution due to a use-after-free vulnerability in the mg_http_get_proto_data function.

Understanding CVE-2018-20353

What is CVE-2018-20353?

This CVE identifies an issue in the Cesanta Mongoose Embedded Web Server Library that allows for a denial of service or potential remote code execution.

The Impact of CVE-2018-20353

The vulnerability can lead to a denial of service (application crash) or remote code execution, posing a significant risk to affected systems.

Technical Details of CVE-2018-20353

Vulnerability Description

An invalid read of 8 bytes occurs in the mg_http_get_proto_data function in mongoose.c, triggered by a use-after-free vulnerability during a "NULL test".

Affected Systems and Versions

Product: Cesanta Mongoose Embedded Web Server Library
Versions affected: 6.13 and earlier

Exploitation Mechanism

The vulnerability arises from an invalid read operation due to a use-after-free issue during a specific function call.

Mitigation and Prevention

Immediate Steps to Take

Apply patches or updates provided by the vendor promptly.
Monitor security advisories for any new information or updates regarding this vulnerability.

Long-Term Security Practices

Regularly update software and libraries to mitigate potential vulnerabilities.
Implement secure coding practices to prevent similar issues in the future.

Patching and Updates

Ensure that the Cesanta Mongoose Embedded Web Server Library is updated to a version that addresses the vulnerability.