CVE-2023-1713 : Security Advisory and Response

This CVE-2023-1713 information discusses a critical vulnerability identified as the Bitrix24 Remote Command Execution (RCE) via Insecure Temporary File Creation.

Understanding CVE-2023-1713

CVE-2023-1713 is a security flaw discovered in Bitrix24, version 22.0.300, that allows remote authenticated attackers to execute arbitrary code by leveraging insecure temporary file creation in a specific component.

What is CVE-2023-1713?

The vulnerability in Bitrix24 22.0.300 occurs due to insecure temporary file creation in the "bitrix/modules/crm/lib/order/import/instagram.php" file on the Apache HTTP Server. Attackers with remote authenticated access can upload a crafted ".htaccess" file to execute arbitrary code.

The Impact of CVE-2023-1713

The impact of CVE-2023-1713 is categorized as high severity, with a CVSS base score of 8.8. It can lead to the local execution of code (CAPEC-549), posing risks of confidentiality, integrity, and availability breaches.

Technical Details of CVE-2023-1713

This section provides a deeper look into the technical aspects of CVE-2023-1713 vulnerability.

Vulnerability Description

The vulnerability stems from the unrestricted upload of a dangerous file type, allowing attackers to perform remote command execution through the ".htaccess" file upload.

Affected Systems and Versions

Affected Version: Bitrix24 version 22.0.300
Affected Component: bitrix/components/bitrix/crm.order.import.instagram.view/class.php

Exploitation Mechanism

By exploiting the insecure temporary file creation vulnerability in the specified Bitrix24 component, attackers can upload a malicious ".htaccess" file to execute unauthorized code remotely.

Mitigation and Prevention

To prevent exploitation and mitigate the risks associated with CVE-2023-1713, consider the following actions:

Immediate Steps to Take

Update Bitrix24 to a patched version that addresses the vulnerability.
Implement access controls and restrictions on file uploads to prevent malicious files from being executed.
Conduct security assessments and audits to identify and resolve similar vulnerabilities proactively.

Long-Term Security Practices

Regularly update and patch software to ensure the latest security fixes are applied.
Provide security awareness training to all users to recognize and report suspicious activities effectively.
Utilize web application firewalls and intrusion detection systems to monitor and block potential threats.

Patching and Updates

Keep track of security advisories and updates released by Bitrix24 to promptly apply patches against known vulnerabilities like CVE-2023-1713. Regularly review and enhance security measures to safeguard against emerging threats.