CVE-2007-2114 in Database Server
Summary
by MITRE
Multiple unspecified vulnerabilities in Oracle Database 10.1.0.5 and 10.2.0.2 have unknown impact and remote authenticated attack vectors, related to (1) Change Data Capture (CDC), aka DB08, and (2) Oracle Instant Client, aka DB11. NOTE: as of 20070424, oracle has not disputed reliable claims that these issues are buffer overflows using a long CHANGE_TABLE_NAME parameter to the DBMS_CDC_IPUBLISH.CHGTAB_CACHE procedure (DB08) and Oracle Instant Client genezi utility (DB11).
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Analysis
by VulDB Data Team • 07/14/2021
The vulnerability identified as CVE-2007-2114 represents a critical security weakness in Oracle Database versions 10.1.0.5 and 10.2.0.2 affecting both Change Data Capture functionality and Oracle Instant Client components. This vulnerability manifests through buffer overflow conditions that occur when processing excessively long CHANGE_TABLE_NAME parameters within specific database procedures and client utilities. The affected components include the DBMS_CDC_IPUBLISH.CHGTAB_CACHE procedure designated as DB08 and the Oracle Instant Client genezi utility referred to as DB11. These issues present significant security implications as they allow authenticated remote attackers to potentially execute arbitrary code on affected systems.
The technical flaw stems from inadequate input validation mechanisms within Oracle Database's Change Data Capture implementation and Instant Client utilities. When the CHANGE_TABLE_NAME parameter exceeds allocated buffer boundaries during processing of the CHGTAB_CACHE procedure, memory corruption occurs that can be exploited to overwrite adjacent memory locations. This buffer overflow vulnerability specifically affects the handling of table names used in change data capture processes, where the system fails to properly validate the length of input parameters before processing. The vulnerability is classified under CWE-121 as a stack-based buffer overflow, representing a fundamental flaw in memory management and input sanitization within Oracle's database components. The attack vector requires authentication to the database system, making it a remote authenticated vulnerability that can be particularly dangerous in environments where database access is granted to multiple users.
The operational impact of this vulnerability extends beyond simple data corruption or system crashes, as it provides potential attackers with pathways to gain unauthorized access to database systems. Successful exploitation could result in complete system compromise, data exfiltration, or disruption of database services that are critical to enterprise operations. Organizations utilizing Oracle Database 10.1.0.5 and 10.2.0.2 versions face significant risk exposure, particularly in environments where database administrators have granted sufficient privileges to users who might be compromised. The vulnerability affects both the core database functionality through the Change Data Capture mechanism and client-side applications through the Instant Client utilities, creating multiple potential attack surfaces. This dual impact means that organizations must consider both server-side database configurations and client applications when implementing mitigation strategies, making the vulnerability particularly challenging to secure comprehensively.
Mitigation strategies for CVE-2007-2114 should prioritize immediate patching of affected Oracle Database versions to address the buffer overflow conditions in both the Change Data Capture procedures and Instant Client components. Organizations should implement network segmentation and access controls to limit authentication access to database systems, particularly for users who do not require administrative privileges. The implementation of parameter validation controls within database applications can help prevent malicious input from reaching vulnerable procedures, while monitoring and logging of database activities can aid in detecting exploitation attempts. According to ATT&CK framework, this vulnerability aligns with techniques involving privilege escalation and code injection, making defensive measures such as principle of least privilege enforcement and regular security assessments essential. Additionally, organizations should conduct comprehensive vulnerability assessments to identify other potential buffer overflow conditions in database components and ensure that all database applications properly validate input parameters before processing. The vulnerability serves as a reminder of the critical importance of regular security updates and proper input validation in database systems, particularly given the remote authenticated nature of the attack vector that allows exploitation from outside the organization's network perimeter.