CVE-2025-7353 in 1756-EN2T
Summary
by MITRE • 08/14/2025
A security issue exists within the 5032 16pt Digital Configurable module’s web server. The web server’s session number increments at an interval that correlates to the last two consecutive sign in session interval, making it predictable.
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Analysis
by VulDB Data Team • 08/17/2025
The vulnerability identified as CVE-2025-7353 resides within the web server component of the 5032 16pt Digital Configurable module, representing a significant security weakness that directly impacts session management and authentication processes. This module, designed for digital configurable systems, incorporates a web server that handles user authentication and session tracking, making it a critical attack surface for potential exploitation. The flaw manifests in the predictable nature of session number generation, which compromises the fundamental security principle of session uniqueness and randomness that is essential for maintaining secure user sessions.
The technical implementation of this vulnerability stems from the web server's session number incrementing mechanism that follows a pattern based on the last two consecutive sign-in session intervals. This predictable increment behavior creates a deterministic sequence that can be easily reverse-engineered by an attacker who observes the session numbers generated during legitimate authentication processes. The vulnerability directly maps to CWE-330 Use of Insufficiently Random Values, which specifically addresses weaknesses in cryptographic implementations where insufficient randomness leads to predictable outputs. The predictable session numbers expose the system to session hijacking attacks, where malicious actors can anticipate and potentially reuse valid session identifiers to gain unauthorized access to user accounts and system resources.
The operational impact of CVE-2025-7353 extends beyond simple authentication bypass scenarios, creating a comprehensive attack vector that can lead to unauthorized system access, data breaches, and privilege escalation within the affected digital configurable module. Attackers leveraging this vulnerability can systematically guess valid session tokens, potentially gaining access to multiple user accounts simultaneously without requiring valid credentials for each individual session. This weakness particularly affects systems where session management is critical for operational security, as it undermines the integrity of the authentication process and creates opportunities for persistent unauthorized access. The vulnerability also aligns with ATT&CK technique T1566.001 Phishing: Spearphishing Attachment, where attackers might exploit the predictable session behavior to maintain access during reconnaissance phases or to establish more persistent footholds within the system.
Mitigation strategies for this vulnerability require immediate implementation of cryptographic random number generation for session identifier creation, ensuring that session numbers are generated using cryptographically secure pseudo-random number generators that meet industry standards such as NIST SP 800-90A. Organizations should implement session management policies that enforce unique, unpredictable session identifiers for each authentication event, incorporating proper entropy sources and avoiding deterministic increment patterns. The system should also implement additional security controls including session timeout mechanisms, IP binding for sessions, and monitoring for unusual session activity patterns. Regular security audits and penetration testing should be conducted to validate that session management implementations meet current security standards and that no similar predictable patterns exist within other system components. Furthermore, system administrators should establish logging and alerting mechanisms to detect potential exploitation attempts based on observed session number patterns, ensuring that any suspicious activity related to session management is promptly identified and addressed through appropriate incident response procedures.