CVE-2004-1661 in Mailworks Professional
Summary
by MITRE
MailWorks Professional allows remote attackers to bypass authentication and gain privileges via a cookie that contains "auth=1" and "uId=1."
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Analysis
by VulDB Data Team • 06/09/2025
The vulnerability described in CVE-2004-1661 represents a critical authentication bypass flaw within MailWorks Professional software that enables remote attackers to escalate privileges without proper authorization. This issue stems from improper session management and authentication validation mechanisms within the application's cookie handling system. The vulnerability specifically manifests when the application processes cookies containing the parameters auth=1 and uId=1 which are intended to authenticate users and assign administrative privileges. The flaw demonstrates a classic weakness in access control implementation where the application fails to properly validate the authenticity and integrity of these cookie values before granting elevated access rights.
From a technical perspective, this vulnerability falls under the category of weak session management and improper authentication checks as classified by CWE-287, which addresses authentication bypass issues. The flaw operates by exploiting the application's trust in cookie data without sufficient validation mechanisms to ensure that these values originate from legitimate sources. Attackers can simply craft malicious cookies with the specified parameters to bypass the normal authentication flow and gain administrative access to the MailWorks Professional system. This represents a fundamental failure in the principle of least privilege and demonstrates how improper input validation can lead to complete system compromise.
The operational impact of this vulnerability is severe as it allows remote attackers to gain unauthorized administrative access to email server functionality, potentially leading to data breaches, email interception, message manipulation, and complete system control. The remote nature of the attack means that adversaries do not require physical access or local network presence to exploit this vulnerability, making it particularly dangerous in enterprise environments where email servers are critical infrastructure components. This type of vulnerability can be leveraged to establish persistent access, exfiltrate sensitive communications, or disrupt email services that organizations depend upon for business operations.
Mitigation strategies for this vulnerability should focus on implementing robust session management practices and strengthening authentication mechanisms within the MailWorks Professional application. Organizations should ensure that all cookie values are properly validated and authenticated before granting access privileges, implementing proper input sanitization, and employing secure session management techniques that prevent cookie manipulation. The fix should include validating the integrity of authentication cookies through cryptographic means, implementing proper session timeout mechanisms, and ensuring that administrative privileges are only granted after multi-factor authentication or additional verification steps. This vulnerability also highlights the importance of regular security assessments and proper secure coding practices, as outlined in the ATT&CK framework's credential access and privilege escalation techniques, where adversaries often exploit weak authentication mechanisms to gain unauthorized access to systems and data.