CVE-2001-0972 in ASP Forum
Summary
by MITRE
Surf-Net ASP Forum before 2.30 uses easily guessable cookies based on the UserID, which allows remote attackers to gain administrative privileges by calculating the value of the admin cookie (UserID 1), i.e. "0888888."
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Analysis
by VulDB Data Team • 09/30/2025
The vulnerability described in CVE-2001-0972 represents a critical authentication flaw in the Surf-Net ASP Forum software prior to version 2.30. This issue stems from a predictable cookie generation mechanism that exposes the system to unauthorized administrative access. The flaw specifically affects the session management component of the web application, where cookies are generated using a straightforward algorithm based on the user identifier. The security weakness becomes apparent when examining how the system handles administrative privileges, as the cookie value for the administrator account can be easily calculated by attackers who know the UserID of the admin account, which is typically 1 in such systems.
The technical implementation of this vulnerability demonstrates a fundamental flaw in cryptographic design and session management practices. The cookie generation algorithm uses a simple mathematical relationship between the UserID and the resulting cookie value, making it trivial for attackers to compute the correct administrative cookie. This predictable pattern violates core security principles outlined in the OWASP Top Ten and aligns with CWE-310, which addresses cryptographic weaknesses in applications. The vulnerability operates at the application layer and specifically targets the authentication mechanism, allowing attackers to bypass normal access controls through a process known as session hijacking or privilege escalation.
The operational impact of this vulnerability is severe as it provides attackers with immediate administrative access to the forum system without requiring any valid credentials or authentication factors. Once an attacker calculates the admin cookie value of "0888888" for UserID 1, they can impersonate the administrator account and perform any actions permitted by administrative privileges. This includes modifying forum content, deleting posts, adding or removing users, changing system configurations, and potentially accessing sensitive data stored within the forum. The vulnerability affects all users who have access to the forum and can be exploited remotely without requiring any special tools or privileges beyond knowledge of the target system's administrative account structure.
From a threat modeling perspective, this vulnerability aligns with ATT&CK technique T1566, which covers social engineering and credential access methods, and T1078, which addresses valid accounts usage for persistence. The attack vector is particularly dangerous because it requires minimal reconnaissance effort from threat actors, as the cookie generation pattern can often be discovered through simple observation or documentation analysis. Organizations should implement proper session management practices including the use of cryptographically secure random number generators for cookie creation, implementing proper session timeout mechanisms, and ensuring that administrative privileges are not accessible through predictable authentication tokens. The vulnerability also highlights the importance of following secure coding practices and conducting regular security assessments to identify and remediate similar weaknesses in web application frameworks and components.
Mitigation strategies for this vulnerability include immediate patching of the Surf-Net ASP Forum software to version 2.30 or later, where the cookie generation mechanism has been properly secured. Organizations should also implement additional security controls such as rotating session identifiers, implementing proper access logging, and establishing monitoring for unusual administrative activities. The fix should involve using cryptographically strong random values for session cookies and implementing proper session management that does not rely on predictable patterns based on user identifiers. Security teams should also consider implementing network-level protections such as intrusion detection systems and access control lists to limit exposure to this type of vulnerability.