CVE-2006-0435 in Oracle
Summary
by MITRE
Unspecified vulnerability in Oracle PL/SQL (PLSQL), as used in Database Server DS 9.2.0.7 and 10.1.0.5, Application Server 1.0.2.2, 9.0.4.2, 10.1.2.0.2, 10.1.2.1.0, and 10.1.3.0.0, E-Business Suite and Applications 11.5.10, and Collaboration Suite 10.1.1, 10.1.2.0, 10.1.2.1, and 9.0.4.2, allows attackers to bypass the PLSQLExclusion list and access excluded packages and procedures, aka Vuln# PLSQL01.
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Analysis
by VulDB Data Team • 01/20/2025
The vulnerability identified as CVE-2006-0435 represents a critical security flaw within Oracle's PL/SQL execution environment that affects multiple Oracle product versions including Database Server, Application Server, E-Business Suite, and Collaboration Suite. This vulnerability specifically targets the PLSQLExclusion list mechanism which is designed to prevent unauthorized access to sensitive packages and procedures within the Oracle database environment. The flaw allows attackers to circumvent the intended security controls that should restrict access to privileged database objects, creating a significant risk for organizations relying on Oracle technologies for their core business operations.
The technical nature of this vulnerability stems from a failure in the PL/SQL access control implementation where the exclusion list mechanism does not properly validate user privileges or authentication contexts when executing database operations. This weakness creates a path for malicious actors to access excluded packages and procedures that should be restricted to authorized users only. The vulnerability operates at the application level within Oracle's PL/SQL engine, making it particularly dangerous as it can be exploited through standard database connection methods without requiring elevated privileges or specialized attack tools. The flaw essentially allows privilege escalation by enabling unauthorized users to execute code that should be restricted to administrators or specific authorized roles.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass potential data breaches, system compromise, and business disruption. Attackers who successfully exploit this vulnerability can access sensitive database objects including system tables, administrative procedures, and business-critical data that should remain protected. This exposure can lead to complete system compromise where attackers gain the ability to manipulate database contents, extract confidential information, or even escalate their privileges to full administrative control of the database environment. The widespread nature of affected Oracle products means that organizations across multiple industries and deployment scenarios could be impacted, making this vulnerability particularly concerning for enterprise environments.
Organizations affected by this vulnerability should immediately implement comprehensive mitigation strategies focusing on access control hardening and security monitoring. The primary mitigation involves applying Oracle's security patches and updates that address the specific PL/SQL exclusion list bypass mechanism. Additionally, implementing network segmentation and strict access controls can help reduce the attack surface by limiting direct database access to trusted networks and authorized users only. Security monitoring should be enhanced to detect unusual database access patterns or attempts to execute restricted procedures. From a compliance perspective, this vulnerability relates to CWE-284 which addresses improper access control, and aligns with ATT&CK techniques involving privilege escalation and credential access. Organizations should also consider implementing database activity monitoring solutions and regularly reviewing database user permissions to ensure proper segregation of duties and minimize potential impact from such security flaws.