CVE-2014-6633 in Tryton
Summary
by MITRE
The safe_eval function in trytond in Tryton before 2.4.15, 2.6.x before 2.6.14, 2.8.x before 2.8.11, 3.0.x before 3.0.7, and 3.2.x before 3.2.3 allows remote authenticated users to execute arbitrary commands via shell metacharacters in (1) the collection.domain in the webdav module or (2) the formula field in the price_list module.
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Analysis
by VulDB Data Team • 01/24/2020
The vulnerability described in CVE-2014-6633 represents a critical command injection flaw within the Tryton business management software platform. This issue affects multiple version branches of Tryton including 2.4, 2.6, 2.8, 3.0, and 3.2, with specific patched versions outlined in the advisory. The vulnerability stems from the unsafe handling of user input within the safe_eval function, which is designed to evaluate expressions but fails to properly sanitize or validate input containing shell metacharacters. The flaw exists in two distinct attack vectors within the Tryton ecosystem, specifically targeting the webdav module's collection.domain parameter and the price_list module's formula field, both of which process user-supplied data without adequate input validation.
The technical implementation of this vulnerability exploits the inherent trust placed in the safe_eval function, which should theoretically provide safe evaluation of expressions but instead becomes a conduit for arbitrary command execution. When authenticated users manipulate the collection.domain parameter in the webdav module or the formula field in the price_list module, they can inject shell metacharacters that get processed by the underlying system's command execution mechanisms. This allows attackers to execute arbitrary system commands with the privileges of the Tryton application process, potentially leading to complete system compromise. The vulnerability operates at the application level where user input flows directly into command execution contexts, creating a direct path for privilege escalation and remote code execution.
The operational impact of this vulnerability extends beyond simple command execution, as it provides attackers with the ability to manipulate the entire Tryton environment and potentially access underlying system resources. Attackers can leverage this vulnerability to escalate privileges, extract sensitive data, modify system configurations, or establish persistent access points within the network. The authenticated nature of the attack means that even limited user accounts can potentially exploit this flaw, making it particularly dangerous in environments where multiple users have access to the Tryton platform. This vulnerability directly maps to CWE-78, which describes improper neutralization of special elements used in OS commands, and aligns with ATT&CK techniques involving command and script injection. Organizations using affected Tryton versions face significant risk of data breaches, system compromise, and potential lateral movement within their network infrastructure.
The recommended mitigation strategy involves immediate upgrading to patched versions of Tryton as specified in the advisory, with version 2.4.15, 2.6.14, 2.8.11, 3.0.7, and 3.2.3 being the minimum required to address this vulnerability. Organizations should also implement additional security controls including network segmentation, privileged access monitoring, and input validation enforcement at multiple layers of the application stack. Regular security assessments and vulnerability scanning should be conducted to identify similar patterns in other applications, as this vulnerability demonstrates the importance of proper input sanitization in all evaluation functions. The fix typically involves implementing proper parameter escaping and validation mechanisms that prevent shell metacharacter interpretation in user-supplied data before it reaches command execution contexts.