CVE-2019-2753 in Oracle
Summary
by MITRE
Vulnerability in the Oracle Text component of Oracle Database Server. Supported versions that are affected are 11.2.0.4, 12.1.0.2, 12.2.0.1 and 18c. Easily exploitable vulnerability allows low privileged attacker having Create Session privilege with network access via OracleNet to compromise Oracle Text. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Oracle Text accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Text. CVSS 3.0 Base Score 4.6 (Confidentiality and Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L).
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Analysis
by VulDB Data Team • 07/05/2020
The vulnerability identified as CVE-2019-2753 resides within the Oracle Text component of Oracle Database Server, representing a significant security weakness that affects multiple version lines including 11.2.0.4, 12.1.0.2, 12.2.0.1, and 18c. This flaw operates at the intersection of database security and network communication protocols, specifically leveraging OracleNet for network access. The vulnerability classification as easily exploitable indicates that attackers can readily leverage this weakness without requiring extensive technical expertise or specialized tools, making it particularly concerning for organizations with extensive Oracle database deployments.
The technical nature of this vulnerability stems from insufficient input validation within the Oracle Text processing mechanisms, which allows malicious actors with minimal privileges to execute unauthorized operations against the database text processing functionality. The requirement for a low-privileged attacker to possess Create Session privilege demonstrates that this vulnerability can be exploited by individuals who already have basic database connectivity rights, potentially through compromised user accounts or insider threats. The attack vector utilizes OracleNet network protocols, enabling remote exploitation from external network locations, which significantly expands the potential attack surface.
From an operational perspective, the impact of this vulnerability manifests in two primary areas: unauthorized data access and partial denial of service conditions. The confidentiality impact level of CVSS 3.0 score 4.6 indicates that attackers can access a subset of Oracle Text accessible data, potentially including sensitive textual information stored within database tables, documents, or other text-based database objects. The availability impact component suggests that successful exploitation can result in partial denial of service, meaning that the Oracle Text functionality may become partially impaired or unavailable to legitimate users, disrupting database operations and potentially affecting business continuity. The requirement for human interaction from a person other than the attacker indicates that while the vulnerability itself is easily exploitable, social engineering or user manipulation may be necessary to complete the attack chain, though this adds only minimal complexity to the overall exploitation process.
Organizations affected by this vulnerability should prioritize immediate remediation through Oracle's security patches and updates, as the CVSS score indicates a moderate to high risk level that warrants urgent attention. The vulnerability aligns with CWE-20, which describes improper input validation issues, and can be mapped to ATT&CK technique T1078 for valid accounts and T1046 for network service scanning, indicating that attackers may use this vulnerability as part of broader exploitation campaigns. Network segmentation and access controls should be implemented to limit potential attack vectors, while database monitoring should be enhanced to detect unusual text processing activities. Additionally, regular security assessments and vulnerability scanning should be conducted to identify similar weaknesses in database configurations and ensure that all systems remain protected against evolving threats in the database security landscape.