CVE-2001-1253 in Alexis Server
Summary
by MITRE
Alexis 2.0 and 2.1 in COM2001 InternetPBX stores voicemail passwords in plain text in the com2001.ini file, which could allow local users to make long distance calls as other users.
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Analysis
by VulDB Data Team • 04/09/2019
The vulnerability identified as CVE-2001-1253 represents a critical security flaw in the COM2001 InternetPBX system, specifically affecting versions Alexis 2.0 and 2.1. This issue stems from poor security practices in credential storage mechanisms where voicemail passwords are maintained in plaintext format within the com2001.ini configuration file. The fundamental problem lies in the absence of proper cryptographic protection for sensitive authentication data, creating an exploitable condition that directly compromises system security.
The technical implementation of this vulnerability demonstrates a clear violation of security best practices and aligns with CWE-312, which addresses the exposure of sensitive information through improper data handling. The plaintext storage of voicemail passwords within the configuration file creates an attack surface where local users can directly access these credentials without requiring any sophisticated exploitation techniques. The vulnerability exists because the system fails to implement proper password hashing or encryption mechanisms, leaving authentication tokens in a readable format that can be immediately utilized by unauthorized individuals.
The operational impact of this vulnerability extends beyond simple credential theft, as it enables privilege escalation and unauthorized access to telephony services. Local users who gain access to the com2001.ini file can not only retrieve voicemail passwords but also leverage this information to make unauthorized long distance calls on behalf of other users. This creates significant financial implications for organizations utilizing the affected system, as malicious actors can exploit the compromised credentials to generate unauthorized charges. The vulnerability essentially transforms legitimate user accounts into potential vehicles for fraud and unauthorized resource consumption.
The attack vector for this vulnerability is particularly concerning as it requires only local system access, making it easily exploitable by users with minimal privileges. This aligns with ATT&CK technique T1078 which covers valid accounts usage and privilege escalation through legitimate credentials. The vulnerability demonstrates a classic case of inadequate access control and privilege management, where the system fails to properly isolate user credentials and prevent unauthorized access to sensitive configuration data. Organizations using COM2001 InternetPBX systems face significant risk of financial loss and service disruption when this vulnerability is exploited.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term security improvements. The primary solution involves implementing proper password encryption or hashing mechanisms for all stored credentials, ensuring that authentication data cannot be read directly from configuration files. System administrators should also implement strict file access controls and permissions for the com2001.ini file, limiting access to authorized personnel only. Additionally, organizations should consider implementing regular security audits to identify and remediate similar plaintext storage vulnerabilities across their telephony infrastructure. The vulnerability serves as a critical reminder of the importance of following security guidelines and implementing proper cryptographic practices for sensitive data storage, particularly in systems handling authentication credentials and financial transaction data.