CVE-2002-0110 in Miramail
Summary
by MITRE
Nevrona Designs MiraMail 1.04 and earlier stores authentication information such as POP usernames and passwords in plaintext in a .ini file, which allows an attacker to gain privileges by reading the passwords from the file.
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Analysis
by VulDB Data Team • 10/21/2024
The vulnerability identified as CVE-2002-0110 represents a critical security flaw in Nevrona Designs MiraMail version 1.04 and earlier, demonstrating poor cryptographic practices in credential storage. This issue falls under the category of insecure credential storage as defined by CWE-312, where sensitive authentication data is persisted in an unencrypted format within the application's configuration files. The flaw specifically affects the email client's handling of POP3 authentication credentials, which are stored in plaintext within a .ini file located in the application's directory structure. This design decision exposes users to significant risk as any attacker with access to the system can directly read these credentials without requiring additional exploitation techniques. The vulnerability is particularly concerning because it eliminates the need for complex attack vectors, as the authentication information is readily accessible to anyone who can read the configuration file.
The technical implementation of this flaw involves the application's failure to implement proper encryption or obfuscation mechanisms for storing user credentials. When users configure their email accounts within MiraMail, the system prompts for POP3 usernames and passwords, which are then written to a configuration file without any form of cryptographic protection. This plaintext storage approach violates fundamental security principles and creates a persistent attack surface that remains viable even after the application is closed or the system is rebooted. The .ini file format commonly used by Windows applications makes this vulnerability particularly accessible, as the file structure is well-documented and standard tools can easily parse its contents. The vulnerability is classified as a privilege escalation issue because an attacker who gains access to the file can immediately assume the identity of the email account owner, potentially leading to unauthorized email access, data exfiltration, and further network compromise.
The operational impact of this vulnerability extends beyond simple credential theft, as it creates opportunities for broader security breaches within organizational environments. In enterprise settings where multiple users may share a single system or where local file access is not properly restricted, this flaw can enable attackers to compromise multiple email accounts simultaneously. The vulnerability also aligns with ATT&CK technique T1566, which involves credential harvesting through the exploitation of weak credential storage mechanisms. Once an attacker has obtained the plaintext credentials, they can leverage them for additional attacks including lateral movement, email-based social engineering, or as stepping stones to compromise other systems within the network. The persistence of these credentials in the file system means that even if the application is updated or the user changes their password, the old plaintext credentials remain accessible until the file is manually deleted or overwritten.
Mitigation strategies for this vulnerability should focus on both immediate remediation and long-term architectural improvements. The most effective immediate solution involves upgrading to a newer version of MiraMail that implements proper credential encryption, as the original version is no longer supported and likely contains additional undiscovered vulnerabilities. System administrators should conduct thorough file system audits to identify and remove any existing credential files that may contain plaintext passwords, while implementing proper access controls to limit who can read these configuration files. The implementation of file system permissions that restrict access to the .ini files containing authentication information represents a crucial defensive measure. Additionally, organizations should consider implementing centralized credential management solutions that store authentication information in encrypted databases rather than plaintext files, aligning with security frameworks such as NIST SP 800-63B for identity management. Regular security assessments should include checks for similar credential storage issues across all applications, as this vulnerability type remains prevalent in legacy systems and poorly designed applications, making it essential to maintain vigilance against such fundamental security oversights.