CVE-2019-12208 : Security Advisory and Response

The version of njs up to and including 0.3.1, which is utilized in NGINX, is affected by a heap-based buffer overflow vulnerability located in the njs_function_native_call function within the njs_function.c file of the njs module.

Understanding CVE-2019-12208

This CVE identifies a specific vulnerability in the njs module used in NGINX.

What is CVE-2019-12208?

CVE-2019-12208 is a heap-based buffer overflow vulnerability in the njs_function_native_call function of the njs module up to version 0.3.1, as integrated with NGINX.

The Impact of CVE-2019-12208

This vulnerability could potentially allow an attacker to execute arbitrary code or cause a denial of service by exploiting the buffer overflow in the njs module.

Technical Details of CVE-2019-12208

The technical aspects of this CVE are as follows:

Vulnerability Description

The vulnerability lies in a heap-based buffer overflow in the njs_function_native_call function within the njs_function.c file of the njs module.

Affected Systems and Versions

Product: n/a
Vendor: n/a
Versions: up to and including 0.3.1

Exploitation Mechanism

The vulnerability can be exploited by crafting specific input that triggers the buffer overflow in the njs_function_native_call function.

Mitigation and Prevention

To address CVE-2019-12208, consider the following steps:

Immediate Steps to Take

Update NGINX to a version that includes a patch for this vulnerability.
Monitor for any unusual activity that could indicate exploitation of the vulnerability.

Long-Term Security Practices

Regularly update software and modules to the latest versions to mitigate known vulnerabilities.
Implement network security measures to detect and prevent unauthorized access.

Patching and Updates

Ensure that NGINX and the njs module are kept up to date with the latest security patches to prevent exploitation of this vulnerability.