CVE-2006-0774 in Db Esession
Summary
by MITRE
SQL injection vulnerability in deleteSession() in DB_eSession library 1.0.2 and earlier, as used in multiple products, allows remote attackers to execute arbitrary SQL commands via the $_sess_id_set variable, which is usually derived from PHPSESSID.
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Analysis
by VulDB Data Team • 07/31/2017
The vulnerability identified as CVE-2006-0774 represents a critical SQL injection flaw within the DB_eSession library version 1.0.2 and earlier implementations. This vulnerability exists in the deleteSession() function where the $_sess_id_set variable is processed without proper input sanitization or validation. The affected products typically utilize PHPSESSID cookies as the primary means of session management, making this vulnerability particularly dangerous as it directly targets the session handling mechanism that underpins web application security. The vulnerability stems from the improper handling of user-supplied session identifiers that are automatically extracted from HTTP cookies, creating an attack surface where malicious actors can manipulate session data to inject arbitrary SQL commands.
The technical exploitation of this vulnerability occurs when an attacker manipulates the PHPSESSID cookie value to include malicious SQL syntax that gets directly incorporated into database queries within the deleteSession() function. This flaw represents a classic SQL injection vulnerability categorized under CWE-89, which specifically addresses improper neutralization of special elements used in SQL commands. The vulnerability allows remote attackers to execute arbitrary SQL commands against the underlying database system, potentially leading to complete database compromise, data exfiltration, or unauthorized access to sensitive information stored within the application's database infrastructure. The attack vector is particularly concerning because it leverages the standard session management mechanism that applications rely upon for user authentication and authorization, making it both accessible and impactful.
The operational impact of this vulnerability extends beyond simple data theft, as successful exploitation can result in complete system compromise and unauthorized access to sensitive user data, application logic, and database structures. Attackers can leverage this vulnerability to perform actions such as reading, modifying, or deleting database records, potentially gaining access to user credentials, personal information, financial data, or proprietary business information. The vulnerability affects multiple products that utilize the DB_eSession library, creating a widespread risk across various web applications that depend on this session management component. This type of vulnerability aligns with ATT&CK technique T1071.004, which covers application layer protocol manipulation, and specifically targets the database layer through improper input handling. The impact is particularly severe because session management is fundamental to web application security, making this vulnerability a prime target for attackers seeking persistent access to systems.
Mitigation strategies for CVE-2006-0774 require immediate patching of affected systems to upgrade to DB_eSession library versions that properly sanitize input parameters before incorporating them into database queries. Organizations should implement proper input validation and parameterized queries to prevent SQL injection attacks, ensuring that session identifiers are properly escaped or parameterized before database operations. Additionally, implementing web application firewalls and input filtering mechanisms can provide additional layers of protection against exploitation attempts. Security teams should conduct comprehensive vulnerability assessments to identify all instances of the affected library within their infrastructure and ensure proper database access controls are implemented to limit the potential damage from successful exploitation attempts. The remediation process must include thorough testing to ensure that the patch does not introduce compatibility issues with existing application functionality while maintaining the security improvements necessary to protect against this specific SQL injection vulnerability.