CVE-2021-2039 in Siebel Core - Server Framework
Summary
by MITRE • 01/20/2021
Vulnerability in the Siebel Core - Server Framework product of Oracle Siebel CRM (component: Search). Supported versions that are affected are 20.12 and prior. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Siebel Core - Server Framework. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Siebel Core - Server Framework, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Siebel Core - Server Framework accessible data as well as unauthorized update, insert or delete access to some of Siebel Core - Server Framework accessible data. CVSS 3.1 Base Score 7.6 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N).
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Analysis
by VulDB Data Team • 02/17/2021
The vulnerability identified as CVE-2021-2039 resides within the Siebel Core - Server Framework component of Oracle Siebel CRM, specifically affecting the search functionality. This issue impacts versions 20.12 and earlier, representing a significant security weakness that can be exploited by low-privileged attackers with network access through HTTP protocols. The vulnerability's classification as easily exploitable indicates that attackers can leverage relatively straightforward techniques to compromise the system, making it particularly concerning for organizations relying on Siebel CRM for critical business operations. The attack vector requires network access via HTTP, suggesting that the vulnerability can be exploited from external networks without requiring physical access to the system infrastructure.
The technical flaw manifests in the search component of the Siebel Core - Server Framework, where insufficient input validation or access control mechanisms allow unauthorized data access and manipulation. This vulnerability operates under the Common Weakness Enumeration framework as a weakness related to improper access control or input validation, potentially classified under CWE-285 for improper access control or CWE-79 for cross-site scripting depending on the specific exploitation method. The CVSS 3.1 scoring of 7.6 reflects the severity of impact, with high confidentiality impact and low integrity impact, indicating that attackers can access critical data but may not be able to directly modify system configurations. The vulnerability requires human interaction from users other than the attacker, suggesting that social engineering or user manipulation may be necessary to complete the attack, though the underlying system weakness remains exploitable.
The operational impact of this vulnerability extends beyond the immediate Siebel Core - Server Framework, as successful exploitation can affect additional products within the Siebel ecosystem. This cascading effect aligns with ATT&CK framework concept of privilege escalation and lateral movement, where initial access to one component can potentially lead to broader system compromise. The potential for unauthorized access to critical data represents a serious threat to business continuity and information security, while the ability to perform unauthorized updates, inserts, or deletions of data within the framework creates risks for data integrity and system availability. Organizations using Siebel CRM may face regulatory compliance issues and reputational damage if sensitive customer or business data becomes compromised through this vulnerability.
Mitigation strategies should focus on immediate patch application for affected versions, implementing network-level restrictions to limit HTTP access to the Siebel framework, and strengthening access controls through proper authentication and authorization mechanisms. Organizations should also consider network segmentation to isolate critical Siebel components and implement monitoring solutions to detect suspicious activities related to search functionality. The vulnerability's classification under CVSS vector AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N indicates that network-based attacks with low complexity and requiring only low privileges can result in high confidentiality impact, making comprehensive security measures essential. Regular security assessments and vulnerability scanning should be implemented to identify similar weaknesses in other components of the Siebel CRM platform and ensure overall system resilience against evolving threats.