CVE-2018-1773 in Datacap Fastdoc Capture
Summary
by MITRE
IBM Datacap Fastdoc Capture 9.1.1, 9.1.3, and 9.1.4 could allow an authenticated user to bypass future authentication mechanisms once the initial login is completed. IBM X-Force ID: 148691.
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Analysis
by VulDB Data Team • 05/16/2023
IBM Datacap Fastdoc Capture versions 9.1.1, 9.1.3, and 9.1.4 contain a critical authentication bypass vulnerability that undermines the security posture of the application. This flaw allows an authenticated user to circumvent subsequent authentication requirements after successfully completing the initial login process, effectively creating a persistent backdoor access mechanism. The vulnerability stems from improper session management and authentication state handling within the application's security framework, where the system fails to properly validate user credentials for subsequent operations. The issue manifests when a user successfully authenticates and then performs actions that should require re-authentication or additional verification steps, yet the system continues to grant access without proper credential validation.
The technical implementation of this vulnerability involves a failure in the application's session token validation mechanism and authentication state transition logic. When users navigate through the Fastdoc Capture interface, the system should enforce re-authentication for sensitive operations or after a certain time period. However, the flaw permits users to maintain elevated access privileges without proper re-verification, creating a scenario where an attacker who has gained initial access can continue operating within the system without additional authentication checks. This behavior violates fundamental security principles of least privilege and proper access control enforcement, as the system should maintain strict authentication boundaries between different operational phases.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it provides attackers with sustained privileges within the document capture environment. An authenticated attacker could potentially access sensitive document processing capabilities, modify capture configurations, or manipulate the document workflow without further authentication prompts. This persistent access capability aligns with the attack pattern described in the attack technique ATT&CK T1078.004 for Valid Accounts and T1566.001 for Phishing, where attackers leverage legitimate credentials to maintain access. The vulnerability affects the integrity and availability of the document capture system, as unauthorized modifications could compromise document processing workflows and potentially lead to data loss or manipulation. Organizations relying on Fastdoc Capture for sensitive document processing may experience unauthorized access to confidential information, particularly in environments where document classification and access controls are critical.
Mitigation strategies should focus on implementing proper session management controls and strengthening authentication state validation mechanisms within the application. Organizations should immediately apply the vendor-provided security patches and updates to address this vulnerability, as IBM has released fixes specifically targeting the authentication bypass issue. Additionally, implementing robust session timeout mechanisms, enforcing re-authentication for privileged operations, and conducting regular security audits of authentication flows can help prevent exploitation. The vulnerability classification aligns with CWE-287, which addresses improper authentication, and CWE-306, which covers missing authentication. Network segmentation and monitoring of authentication events should be enhanced to detect potential exploitation attempts, while access controls should be reviewed to ensure that only authorized personnel can perform sensitive operations within the Fastdoc Capture environment. Regular security testing and penetration testing should be conducted to validate that authentication bypass scenarios are properly mitigated.