CVE-2021-2115 in Common Applications Calendar
Summary
by MITRE • 01/20/2021
Vulnerability in the Oracle Common Applications Calendar product of Oracle E-Business Suite (component: Tasks). Supported versions that are affected are 12.1.1-12.1.3 and 12.2.3-12.2.10. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Common Applications Calendar. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Oracle Common Applications Calendar, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Common Applications Calendar accessible data as well as unauthorized update, insert or delete access to some of Oracle Common Applications Calendar 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 • 02/16/2021
The vulnerability identified as CVE-2021-2115 resides within Oracle Common Applications Calendar component of the Oracle E-Business Suite, specifically affecting versions 12.1.1 through 12.1.3 and 12.2.3 through 12.2.10. This flaw represents a significant security weakness that operates at the intersection of web application security and enterprise resource planning systems. The vulnerability's classification as easily exploitable indicates that attackers can leverage relatively straightforward techniques to compromise the affected system, making it particularly concerning for organizations running these legacy versions of Oracle E-Business Suite.
The technical nature of this vulnerability involves a privilege escalation issue that requires an attacker to have network access via HTTP protocol while maintaining low privilege user credentials. The attack vector specifically targets the Tasks component within the calendar functionality, suggesting that the flaw exists in how the system handles user requests and authentication processes. According to CVSS 3.1 scoring, this vulnerability carries a base score of 7.6, indicating high severity with significant confidentiality impacts and moderate integrity impacts. The attack requires human interaction from a legitimate user, which means that while the vulnerability is accessible to low-privileged attackers, it cannot be fully automated without user involvement.
The operational impact of CVE-2021-2115 extends beyond the immediate calendar component, as successful exploitation can compromise critical data within the Oracle Common Applications Calendar system and potentially affect additional products within the Oracle E-Business Suite ecosystem. This cascading effect aligns with the CVSS vector's classification of 'C' for scope, indicating that a successful attack could impact additional products. The vulnerability permits unauthorized access to all accessible data within the calendar system and provides attackers with unauthorized update, insert, or delete capabilities for some data, creating both confidentiality and integrity threats that could severely compromise business operations and data integrity.
Organizations should consider implementing multiple layers of defense to address this vulnerability, including immediate patching of affected systems to the latest supported versions of Oracle E-Business Suite. Network segmentation and access controls should be reviewed to limit unnecessary HTTP access to the calendar component, while monitoring systems should be enhanced to detect unusual user behavior patterns. The vulnerability demonstrates the importance of maintaining up-to-date security patches and highlights the risks associated with running unsupported or outdated software versions in enterprise environments. According to CWE classification, this vulnerability relates to CWE-287 which deals with improper authentication, while ATT&CK framework references would align with techniques involving privilege escalation and credential access through web application vulnerabilities. The attack scenario emphasizes the need for comprehensive security awareness training to prevent social engineering attacks that might exploit human interaction requirements, as well as regular security assessments to identify and remediate similar vulnerabilities across the enterprise infrastructure.