CVE-2020-23162 in Termod4
Summary
by MITRE • 01/26/2021
Sensitive information disclosure and weak encryption in Pyrescom Termod4 time management devices before 10.04k allows remote attackers to read a session-file and obtain plain-text user credentials.
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Analysis
by VulDB Data Team • 02/19/2021
The vulnerability identified as CVE-2020-23162 affects Pyrescom Termod4 time management devices running firmware versions prior to 10.04k, representing a critical security flaw that combines sensitive information disclosure with weak encryption practices. This vulnerability resides within the device's session management and authentication mechanisms, creating a pathway for remote attackers to compromise user credentials and potentially gain unauthorized access to the time management system. The issue stems from the improper handling of session files that contain plain-text credentials, which are accessible through network-based attacks without requiring authentication or specialized tools. The affected devices operate in environments where time tracking and access control are critical functions, making this vulnerability particularly dangerous for organizations relying on these systems for security management.
The technical flaw manifests through the device's failure to properly encrypt or protect session files that contain user authentication information. When users authenticate to the Termod4 device, session data is stored in a manner that exposes plain-text credentials, allowing attackers to retrieve this information through remote access. This weakness directly aligns with CWE-312, which describes the exposure of sensitive information through improper data handling, and CWE-327, which addresses weak encryption implementations. The vulnerability can be exploited using standard network reconnaissance techniques, as attackers can access session files through the device's network interface without requiring privileged access or complex attack vectors. The lack of proper encryption mechanisms means that even if network traffic is intercepted, the credentials remain readable and usable by unauthorized parties, creating a persistent security risk.
The operational impact of this vulnerability extends beyond simple credential theft, as it undermines the fundamental security posture of organizations using Pyrescom Termod4 devices for time and access management. Remote attackers can leverage this vulnerability to gain unauthorized access to employee time records, potentially accessing sensitive payroll information, attendance data, and access control logs. The disclosure of plain-text credentials enables attackers to impersonate legitimate users, potentially gaining access to restricted areas or systems that rely on the time management device for authentication. This vulnerability particularly affects environments where time tracking systems are integrated with other security infrastructure, as compromised credentials can provide lateral movement opportunities within the network. The attack surface is broadened by the fact that the vulnerability affects multiple device models and firmware versions, making it difficult for organizations to assess their exposure across different installations.
Organizations should immediately implement mitigation strategies including firmware updates to version 10.04k or later, which address the session file handling and encryption weaknesses. Network segmentation should be implemented to limit access to these devices to authorized personnel only, while monitoring systems should be deployed to detect unauthorized access attempts or unusual network traffic patterns. The implementation of strong encryption protocols and secure session management practices should be enforced across all time management systems, with regular security assessments conducted to identify similar vulnerabilities. According to ATT&CK framework, this vulnerability maps to T1078 for valid accounts and T1566 for phishing, as attackers can use compromised credentials to establish persistent access. Additionally, organizations should consider implementing multi-factor authentication mechanisms and regular credential rotation policies to reduce the impact of credential exposure. The vulnerability also highlights the importance of secure coding practices and proper input validation, as the issue could have been prevented through better session management and encryption implementation during the device's development lifecycle.