CVE-2007-3834 in ALEPH
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in Ex Libris ALEPH allow remote attackers to inject arbitrary web script or HTML via unspecified vectors related to a URL that can be discovered through a keyword search. NOTE: this may be related to the MetaLib XSS issue, CVE-2007-3835.
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Analysis
by VulDB Data Team • 09/05/2018
The vulnerability described in CVE-2007-3834 represents a critical cross-site scripting flaw within the Ex Libris ALEPH library management system, a widely deployed enterprise software solution used by academic and research institutions worldwide. This vulnerability specifically affects the system's handling of user-supplied input through URL parameters that can be discovered via keyword search functionality, creating an attack surface that allows remote threat actors to execute malicious scripts within the context of authenticated user sessions. The flaw exists in the application's input validation and output encoding mechanisms, where user-provided data is not properly sanitized before being rendered in web responses, enabling attackers to inject arbitrary HTML and JavaScript code that executes in victims' browsers.
The technical exploitation of this vulnerability occurs through the manipulation of URL parameters that are processed by the ALEPH system's search functionality, where the discovered URLs contain insecure input handling that fails to properly escape or validate user-supplied content. This vulnerability falls under CWE-79 - Improper Neutralization of Input During Web Page Generation, which specifically addresses the failure to properly encode or escape user-controllable data before incorporating it into dynamically generated web content. The attack vector leverages the system's keyword search feature to identify vulnerable URL endpoints, then crafts malicious payloads that exploit the lack of proper input validation and output encoding in the application's response handling.
The operational impact of this vulnerability extends beyond simple script injection, as it can enable attackers to perform session hijacking, steal sensitive user credentials, access restricted administrative functions, and potentially escalate privileges within the library management system. An attacker could craft malicious URLs that, when visited by authenticated users, would execute scripts that steal session cookies, redirect users to malicious sites, or modify library records. The vulnerability particularly affects users with elevated privileges such as system administrators or library staff who have access to sensitive catalog data, making the potential impact significantly more severe. The issue is closely related to CVE-2007-3835, which addresses similar MetaLib XSS vulnerabilities, indicating a broader pattern of insecure input handling within the Ex Libris product line.
Organizations affected by this vulnerability should implement immediate mitigations including input validation and output encoding controls, web application firewall rules to detect and block malicious payloads, and comprehensive security testing of all user input handling components. The remediation strategy should focus on implementing proper HTML escaping and context-aware output encoding for all dynamic content generation, as recommended by the OWASP Top Ten and the NIST Cybersecurity Framework. Additionally, organizations should conduct thorough security assessments of their ALEPH installations, implement regular security patching procedures, and establish monitoring protocols to detect potential exploitation attempts. The vulnerability demonstrates the critical importance of proper input validation and output encoding in web applications, aligning with ATT&CK technique T1203 - Exploitation for Credential Access, which emphasizes the exploitation of web application vulnerabilities to gain unauthorized access to systems and data.