CVE-2018-11756 Explained : Impact and Mitigation

The PHP Runtime for Apache OpenWhisk can be affected by a security issue where a Docker action using specific versions could potentially enable an attacker to substitute the user function within the container.

Understanding CVE-2018-11756

This CVE involves a vulnerability in the PHP Runtime for Apache OpenWhisk that could allow attackers to manipulate user functions within Docker containers.

What is CVE-2018-11756?

In PHP Runtime for Apache OpenWhisk, certain Docker tags may permit attackers to replace user functions in containers if the user code is exploitable.

The Impact of CVE-2018-11756

The vulnerability could lead to information disclosure if exploited, potentially compromising sensitive data within the container.

Technical Details of CVE-2018-11756

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The vulnerability allows attackers to substitute user functions within Docker containers using specific Docker tags in the PHP Runtime for Apache OpenWhisk.

Affected Systems and Versions

Product: PHP Runtime for Apache OpenWhisk
Versions:
Docker tag openwhisk/action-php-v7.2 1.0.0
openwhisk/action-php-v7.1 1.0.0, 1.0.1

Exploitation Mechanism

Attackers can exploit this vulnerability by leveraging susceptible user code to manipulate user functions within the container.

Mitigation and Prevention

Protecting systems from CVE-2018-11756 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update to the latest versions of the affected Docker tags.
Monitor and review user code for vulnerabilities regularly.

Long-Term Security Practices

Implement secure coding practices to prevent code exploitation.
Conduct regular security assessments and audits to identify and address vulnerabilities.

Patching and Updates

Ensure timely patching of the PHP Runtime for Apache OpenWhisk to address the vulnerability and prevent potential exploitation.