CVE-2017-10326 in Common Applications Calendar
Summary
by MITRE
Vulnerability in the Oracle Common Applications Calendar component of Oracle E-Business Suite (subcomponent: Applications Calendar). Supported versions that are affected are 12.1.1, 12.1.2, 12.1.3, 12.2.3, 12.2.4, 12.2.5, 12.2.6 and 12.2.7. Easily exploitable vulnerability allows unauthenticated 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 3.0 Base Score 8.2 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N).
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Analysis
by VulDB Data Team • 01/17/2021
The vulnerability identified as CVE-2017-10326 resides within the Oracle Common Applications Calendar component of Oracle E-Business Suite, specifically affecting multiple version releases including 12.1.1 through 12.2.7. This represents a critical security flaw that operates at the application layer and demonstrates how deeply embedded calendar functionalities can become attack vectors within enterprise systems. The vulnerability's classification as easily exploitable indicates that attackers require minimal technical expertise to leverage this weakness, making it particularly dangerous in production environments where such systems handle sensitive business data. The attack surface extends beyond the immediate calendar component to potentially impact other integrated Oracle products within the suite, creating cascading security implications that organizations must carefully consider.
The technical nature of this vulnerability involves an authentication bypass mechanism that allows unauthenticated attackers to access the calendar component through standard HTTP network connections. This flaw operates under the Common Weakness Enumeration framework as a weakness related to improper authentication and access control, specifically categorized under CWE-287 which addresses improper handling of authentication tokens. The vulnerability requires human interaction from users other than the attacker, suggesting that the attack might involve social engineering elements where legitimate users inadvertently trigger malicious calendar events or access patterns. The CVSS 3.0 scoring of 8.2 reflects the high severity impact with significant confidentiality and integrity implications, indicating that attackers can achieve unauthorized access to critical data and potentially modify calendar entries that could affect business operations. The attack vector AV:N indicates network-based exploitation, while the low access complexity AC:L suggests that no specialized tools or extensive preparation are required for successful exploitation.
The operational impact of this vulnerability extends far beyond simple calendar data compromise, as successful exploitation can result in complete access to all calendar accessible data and unauthorized modification capabilities. This means that attackers could potentially manipulate scheduling information, access confidential meeting details, or alter critical business calendar entries that affect operational planning. The integrity impact score of 8.2 indicates that attackers can perform unauthorized updates, inserts, or deletions to calendar data, which could severely disrupt business processes and create false information that impacts decision-making. Organizations using Oracle E-Business Suite may experience significant business disruption if calendar data is compromised, particularly in environments where calendar systems are integrated with other critical business processes such as resource management, project tracking, or compliance monitoring. The security implications are further exacerbated by the fact that this vulnerability affects multiple versions of the Oracle E-Business Suite, meaning that organizations across different release cycles may be simultaneously exposed to the same risk.
Mitigation strategies for CVE-2017-10326 should include immediate patching of affected Oracle E-Business Suite versions through official Oracle security updates, as well as network-level controls such as firewall rules that restrict access to calendar components and implement additional authentication layers. Organizations should also consider implementing network segmentation to isolate calendar services from general network access and deploy intrusion detection systems to monitor for unusual calendar access patterns. The implementation of additional authentication mechanisms beyond the default Oracle authentication, such as multi-factor authentication for calendar access, should be considered as part of a comprehensive security posture. Regular security assessments of Oracle E-Business Suite installations should include vulnerability scanning specifically targeting calendar components and related applications to identify potential exposure. The ATT&CK framework categorizes this vulnerability under privilege escalation and credential access tactics, indicating that attackers could leverage this weakness to establish persistent access to calendar systems and potentially expand their attack surface through further exploitation of integrated Oracle applications. Organizations should also conduct regular user access reviews and implement principle of least privilege controls for calendar data access to minimize the impact of potential exploitation.