CVE-2021-37708 in Shopware
Summary
by MITRE • 08/17/2021
Shopware is an open source eCommerce platform. Versions prior to 6.4.3.1 contain a command injection vulnerability in mail agent settings. Version 6.4.3.1 contains a patch. As workarounds for older versions of 6.1, 6.2, and 6.3, corresponding security measures are also available via a plugin.
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Analysis
by VulDB Data Team • 08/19/2021
The vulnerability identified as CVE-2021-37708 affects Shopware, a widely used open source eCommerce platform that powers numerous online businesses worldwide. This command injection flaw exists within the mail agent settings functionality of Shopware versions prior to 6.4.3.1, representing a critical security risk that could allow attackers to execute arbitrary commands on affected systems. The vulnerability stems from insufficient input validation and sanitization within the email configuration parameters, creating an attack surface where malicious actors can manipulate system commands through improperly validated user inputs.
The technical implementation of this vulnerability occurs when administrators configure mail agent settings within the Shopware platform. Attackers can exploit this weakness by injecting malicious command sequences into the mail configuration fields, which are then processed and executed by the underlying system without proper sanitization. This type of vulnerability maps directly to CWE-77, which specifically addresses command injection flaws where user-supplied data is incorporated into system commands without adequate validation or escaping mechanisms. The attack vector typically involves manipulating configuration parameters that are subsequently used in shell commands or system calls, allowing for arbitrary code execution with the privileges of the web application process.
The operational impact of CVE-2021-37708 extends beyond simple data compromise, as successful exploitation could lead to complete system takeover, data exfiltration, and potential lateral movement within network environments. Organizations running vulnerable Shopware installations face significant risks including unauthorized access to customer data, payment information, and sensitive business operations. The vulnerability affects multiple major versions including 6.1, 6.2, and 6.3, indicating a prolonged exposure period where organizations were potentially at risk without proper patch management. This command injection vulnerability could be leveraged by threat actors to establish persistent backdoors, install malware, or conduct further reconnaissance activities within compromised environments.
Security mitigation strategies for this vulnerability include immediate upgrade to Shopware version 6.4.3.1 or later, which contains the official patch addressing the command injection flaw. Organizations running older versions should implement the workaround solutions provided through official plugins designed to address the specific security gap in versions 6.1, 6.2, and 6.3. The ATT&CK framework categorizes this vulnerability under T1059.001 for command and scripting interpreter, as it enables adversaries to execute system commands through the compromised mail agent configuration. Additional defensive measures should include implementing network segmentation, monitoring for suspicious command execution patterns, and establishing robust input validation controls. Organizations should also conduct comprehensive security assessments of their Shopware installations to identify any other potential injection points and ensure proper access controls are in place for administrative functions.