CVE-2022-25752 in SCALANCE X302-7 EEC
Summary
by MITRE • 04/12/2022
A vulnerability has been identified in SCALANCE X302-7 EEC (230V), SCALANCE X302-7 EEC (230V, coated), SCALANCE X302-7 EEC (24V), SCALANCE X302-7 EEC (24V, coated), SCALANCE X302-7 EEC (2x 230V), SCALANCE X302-7 EEC (2x 230V, coated), SCALANCE X302-7 EEC (2x 24V), SCALANCE X302-7 EEC (2x 24V, coated), SCALANCE X304-2FE, SCALANCE X306-1LD FE, SCALANCE X307-2 EEC (230V), SCALANCE X307-2 EEC (230V, coated), SCALANCE X307-2 EEC (24V), SCALANCE X307-2 EEC (24V, coated), SCALANCE X307-2 EEC (2x 230V), SCALANCE X307-2 EEC (2x 230V, coated), SCALANCE X307-2 EEC (2x 24V), SCALANCE X307-2 EEC (2x 24V, coated), SCALANCE X307-3, SCALANCE X307-3, SCALANCE X307-3LD, SCALANCE X307-3LD, SCALANCE X308-2, SCALANCE X308-2, SCALANCE X308-2LD, SCALANCE X308-2LD, SCALANCE X308-2LH, SCALANCE X308-2LH, SCALANCE X308-2LH+, SCALANCE X308-2LH+, SCALANCE X308-2M, SCALANCE X308-2M, SCALANCE X308-2M PoE, SCALANCE X308-2M PoE, SCALANCE X308-2M TS, SCALANCE X308-2M TS, SCALANCE X310, SCALANCE X310, SCALANCE X310FE, SCALANCE X310FE, SCALANCE X320-1 FE, SCALANCE X320-1-2LD FE, SCALANCE X408-2, SCALANCE XR324-12M (230V, ports on front), SCALANCE XR324-12M (230V, ports on front), SCALANCE XR324-12M (230V, ports on rear), SCALANCE XR324-12M (230V, ports on rear), SCALANCE XR324-12M (24V, ports on front), SCALANCE XR324-12M (24V, ports on front), SCALANCE XR324-12M (24V, ports on rear), SCALANCE XR324-12M (24V, ports on rear), SCALANCE XR324-12M TS (24V), SCALANCE XR324-12M TS (24V), SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on front), SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on front), SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on rear), SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on rear), SCALANCE XR324-4M EEC (24V, ports on front), SCALANCE XR324-4M EEC (24V, ports on front), SCALANCE XR324-4M EEC (24V, ports on rear), SCALANCE XR324-4M EEC (24V, ports on rear), SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on front), SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on front), SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on rear), SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on rear), SCALANCE XR324-4M EEC (2x 24V, ports on front), SCALANCE XR324-4M EEC (2x 24V, ports on front), SCALANCE XR324-4M EEC (2x 24V, ports on rear), SCALANCE XR324-4M EEC (2x 24V, ports on rear), SCALANCE XR324-4M PoE (230V, ports on front), SCALANCE XR324-4M PoE (230V, ports on rear), SCALANCE XR324-4M PoE (24V, ports on front), SCALANCE XR324-4M PoE (24V, ports on rear), SCALANCE XR324-4M PoE TS (24V, ports on front), SIPLUS NET SCALANCE X308-2. The webserver of affected devices calculates session ids and nonces in an insecure manner. This could allow an unauthenticated remote attacker to brute-force session ids and hijack existing sessions.
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Analysis
by VulDB Data Team • 04/14/2022
This vulnerability affects a broad range of industrial network devices including SCALANCE X302-7 EEC series, SCALANCE X304-2FE, SCALANCE X306-1LD FE, SCALANCE X307-2 EEC, SCALANCE X307-3, SCALANCE X308-2, SCALANCE X308-2LD, SCALANCE X308-2LH, SCALANCE X308-2LH+, SCALANCE X308-2M, SCALANCE X308-2M PoE, SCALANCE X308-2M TS, SCALANCE X310, SCALANCE X310FE, SCALANCE X320-1 FE, SCALANCE X320-1-2LD FE, SCALANCE X408-2, SCALANCE XR324-12M, SCALANCE XR324-4M EEC, SCALANCE XR324-4M PoE, SCALANCE XR324-4M PoE TS, and SIPLUS NET SCALANCE X308-2 models. The core issue lies in the insecure generation of session identifiers and nonces within the web server component of these industrial network appliances. This weakness stems from predictable or insufficiently random cryptographic methods used in session management, creating a significant security risk for operational technology environments.
The vulnerability creates a path for unauthenticated remote attackers to perform session hijacking attacks by brute-forcing session identifiers. This type of attack directly violates the principles of authentication and session management as defined in the CWE-613 weakness category which addresses insufficient session expiration and weak session management. The insecure calculation of session IDs and nonces allows attackers to predict or guess valid session tokens, thereby gaining unauthorized access to active sessions without requiring valid credentials. This represents a critical weakness in the authentication framework of these industrial devices, particularly concerning their web-based management interfaces.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass potential disruption of industrial control systems and operational technology infrastructure. In industrial environments where these devices serve as network switches or communication nodes, session hijacking could lead to unauthorized configuration changes, data manipulation, or complete system compromise. The attack surface is particularly concerning given that these devices operate in critical infrastructure environments where network availability and integrity are paramount. According to ATT&CK framework, this vulnerability maps to T1566 (Phishing) and T1190 (Exploit Public-Facing Application) techniques, as attackers can exploit the web interface to gain unauthorized access and potentially escalate privileges within the network.
The root cause of this vulnerability aligns with industry standards for secure session management, specifically addressing CWE-330 (Use of Insufficiently Random Values) and CWE-310 (Cryptographic Issues) categories. These devices implement web servers with weak cryptographic random number generation for session identifiers, which violates fundamental security principles. The predictable nature of session token generation means that an attacker with minimal resources could systematically guess valid session tokens, potentially gaining administrative access to device management interfaces. This weakness is particularly dangerous in industrial settings where network devices often serve as entry points for broader network infiltration and where the consequences of unauthorized access can extend to physical system control and safety mechanisms.
Organizations should implement immediate mitigations including firmware updates from the vendor, network segmentation to isolate affected devices, and monitoring for suspicious authentication attempts. The recommended approach involves deploying network access controls to restrict access to device management interfaces, implementing strong authentication mechanisms, and establishing continuous monitoring for session hijacking attempts. Additionally, regular security assessments should be conducted to identify similar weaknesses in other network infrastructure components. This vulnerability demonstrates the critical importance of secure session management in operational technology environments and the need for robust cryptographic implementations in industrial network devices.