CVE-2020-26565 in Opinio
Summary
by MITRE • 07/31/2021
ObjectPlanet Opinio before 7.14 allows Expression Language Injection via the admin/permissionList.do from parameter. This can be used to retrieve possibly sensitive serverInfo data.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 08/06/2021
The vulnerability identified as CVE-2020-26565 affects ObjectPlanet Opinio versions prior to 7.14 and represents a critical expression language injection flaw that can be exploited through the admin/permissionList.do endpoint. This vulnerability stems from insufficient input validation and sanitization mechanisms within the application's parameter handling process, specifically targeting the way the system processes user-supplied data through the permissionList.do administrative interface.
The technical flaw manifests as an expression language injection vulnerability that allows attackers to manipulate the application's internal processing of user input through the parameter mechanism. When an attacker submits maliciously crafted input to the admin/permissionList.do endpoint, the system fails to properly sanitize or escape the expression language syntax, enabling the execution of arbitrary code within the application's context. This vulnerability is classified under CWE-94, which specifically addresses "Improper Control of Generation of Code ('Code Injection')" and falls within the broader category of injection flaws that can lead to complete system compromise.
The operational impact of this vulnerability is severe as it provides attackers with the capability to extract sensitive server information through the retrieval of serverInfo data. This access can reveal critical system details including server configuration, installed software versions, directory structures, and potentially other sensitive operational data that could be leveraged for further exploitation. The administrative nature of the targeted endpoint amplifies the risk, as successful exploitation could provide unauthorized access to permission management functionality, potentially allowing attackers to escalate privileges or modify access controls within the application.
Organizations affected by this vulnerability should prioritize immediate remediation through the application of the vendor-provided patch or upgrade to version 7.14 or later. Additionally, implementing proper input validation and output encoding mechanisms within the application's parameter handling processes would provide defense-in-depth protection against similar injection attacks. Security teams should also consider monitoring for suspicious access patterns to administrative endpoints and implementing web application firewalls to detect and block malicious expression language injection attempts. The vulnerability aligns with ATT&CK technique T1059.007 for "Command and Scripting Interpreter: PowerShell" and T1566.002 for "Phishing: Spearphishing Attachment" as attackers may use this vulnerability to execute malicious commands or deliver payloads through infected email attachments that exploit the vulnerable application.