CVE-2023-39523 : Security Advisory and Response

ScanCode.io is a server that automates software composition analysis with ScanPipe pipelines. Prior to version 32.5.1, a command injection vulnerability exists in the docker image fetch process, allowing malicious commands in the

docker_reference

parameter.

Understanding CVE-2023-39523

This vulnerability, identified in ScanCode.io, allows attackers to inject arbitrary commands during the docker image fetch process, leading to possible exploitation.

What is CVE-2023-39523?

CVE-2023-39523 pertains to a command injection vulnerability found in the docker fetch process of ScanCode.io versions prior to 32.5.1. This flaw enables threat actors to execute malicious commands using user-controlled inputs.

The Impact of CVE-2023-39523

The impact of this vulnerability is marked by a high availability impact, potentially allowing attackers to execute arbitrary commands which could lead to server/container damage. Although blind, the attacker can still cause harm without direct feedback.

Technical Details of CVE-2023-39523

In the

scanpipe/pipes/fetch.py

module, the user-controllable

docker_reference

parameter is vulnerable to command injections due to the lack of input sanitization and direct execution of shell commands.

Vulnerability Description

The vulnerability arises from the insecure construction and execution of shell commands based on user inputs, specifically in the

get_docker_image_platform

function.

Affected Systems and Versions

The vulnerability affects ScanCode.io versions older than 32.5.1, particularly those where the

docker_reference

parameter is utilized in the docker fetch process.

Exploitation Mechanism

By appending malicious commands, threat actors can exploit the vulnerability, especially by injecting commands after

docker://;

input, enabling them to execute unauthorized actions.

Mitigation and Prevention

To address CVE-2023-39523, immediate steps include updating to version 32.5.1 which contains a patch for the command injection issue. Additionally, input sanitization of the

docker_reference

parameter is crucial to prevent further exploitation.

Immediate Steps to Take

Upgrade to version 32.5.1 of ScanCode.io and implement proper input sanitization to mitigate the risk of command injections.

Long-Term Security Practices

Enforce secure coding practices, validate and sanitize user inputs, and regularly update software to prevent vulnerabilities like command injections.

Patching and Updates

Stay informed about security patches and updates for ScanCode.io to address known vulnerabilities and enhance system security.