CVE-2015-0861 in trytond
Summary
by MITRE
model/modelstorage.py in trytond 3.2.x before 3.2.10, 3.4.x before 3.4.8, 3.6.x before 3.6.5, and 3.8.x before 3.8.1 allows remote authenticated users to bypass intended access restrictions and write to arbitrary fields via a sequence of records.
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Analysis
by VulDB Data Team • 10/05/2018
The vulnerability identified as CVE-2015-0861 resides within the modelstorage.py component of the trytond framework, a Python-based business management software suite. This issue affects multiple version branches including 3.2.x prior to 3.2.10, 3.4.x prior to 3.4.8, 3.6.x prior to 3.6.5, and 3.8.x prior to 3.8.1. The flaw represents a significant authorization bypass that allows authenticated attackers to manipulate data beyond their intended permissions. The vulnerability specifically targets the framework's data model storage mechanisms where record sequences are processed and validated.
The technical implementation of this vulnerability stems from inadequate input validation and access control checks within the sequence processing logic of the modelstorage module. When authenticated users submit sequences of records for processing, the system fails to properly validate whether the requesting user has authorization to modify specific fields within those records. This allows malicious actors to construct carefully crafted sequences that include unauthorized field modifications, effectively bypassing the intended access control restrictions. The flaw operates at the application layer and requires authentication credentials to exploit, making it particularly dangerous in environments where users have elevated privileges or where credential compromise occurs.
From an operational perspective, this vulnerability enables remote authenticated attackers to perform unauthorized data modifications across arbitrary fields within the trytond application. The impact extends beyond simple data corruption to potentially enable more sophisticated attacks including privilege escalation, data exfiltration, and system compromise. Attackers could leverage this vulnerability to modify critical business data, alter financial records, manipulate user permissions, or corrupt system integrity. The vulnerability's presence in multiple version streams indicates a fundamental flaw in the access control implementation that was not properly addressed across the software lifecycle. This issue aligns with CWE-284, which describes improper access control in software systems, and represents a classic example of how insufficient validation can lead to privilege escalation.
The exploitation of this vulnerability requires an authenticated user account within the trytond system, making it less severe than some zero-day exploits but still highly concerning for enterprise environments. Organizations running affected versions of trytond face significant risk as the vulnerability can be leveraged to bypass security controls that are fundamental to business process integrity. The impact is particularly severe in financial and enterprise resource planning environments where data accuracy and access control are paramount. Security teams should prioritize patching affected systems and implementing additional monitoring for unauthorized field modifications. This vulnerability also aligns with ATT&CK technique T1078 which covers valid accounts and privilege escalation, as it allows authenticated users to perform actions beyond their intended permissions. Organizations should conduct thorough security assessments of their trytond deployments to identify and remediate this access control weakness before it can be exploited by malicious actors.