CVE-2002-1730 in Guestbook
Summary
by MITRE
ASPjar Guestbook 1.00 allows remote attackers to delete arbitrary messages accessing the delete.asp administrative script with certain cookie values set to "true".
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Analysis
by VulDB Data Team • 06/09/2018
The vulnerability identified as CVE-2002-1730 affects ASPjar Guestbook version 1.00, a web-based guestbook application written in active server pages technology. This security flaw represents a classic case of insufficient access control within the application's administrative interface, specifically targeting the delete.asp script that handles message deletion functionality. The vulnerability stems from the application's failure to properly validate administrative privileges before executing destructive operations, creating a path for unauthorized users to manipulate the system through crafted cookie values.
The technical implementation of this vulnerability exploits the application's reliance on client-side cookie values to determine administrative access rights. When an attacker accesses the delete.asp script with specific cookie parameters set to "true", the application erroneously interprets these values as legitimate administrative credentials, bypassing proper authentication mechanisms. This represents a fundamental flaw in the application's privilege escalation logic, where cookie-based session management is insufficient to prevent unauthorized access to administrative functions. The vulnerability specifically targets the authentication validation process within the ASP application, allowing attackers to escalate their privileges through manipulation of client-side state information.
The operational impact of this vulnerability extends beyond simple message deletion, as it provides attackers with unauthorized administrative access to the guestbook system. This compromise enables malicious actors to remove all messages from the guestbook, potentially destroying valuable user interactions and compromising the integrity of the application's data. The vulnerability also creates opportunities for data manipulation and potentially more severe attacks if the application's administrative interface contains additional functions beyond message deletion. From a security perspective, this represents a critical access control failure that undermines the application's security model and provides attackers with unauthorized administrative capabilities.
This vulnerability aligns with CWE-285, which addresses improper authorization issues in software applications, and demonstrates how insufficient access control mechanisms can lead to privilege escalation attacks. The attack pattern follows typical exploitation techniques described in the MITRE ATT&CK framework under the privilege escalation category, where attackers leverage application weaknesses to gain elevated access rights. The vulnerability also reflects poor input validation practices and inadequate session management, which are commonly addressed through secure coding guidelines and security frameworks that emphasize proper authentication and authorization controls.
Mitigation strategies for this vulnerability require immediate implementation of proper authentication controls within the ASPjar Guestbook application. The most effective approach involves modifying the delete.asp script to validate administrative credentials through server-side authentication checks rather than relying on client-side cookie values. Administrators should implement proper session management mechanisms that verify user identity before executing administrative operations, including implementing time-based session tokens and server-side credential validation. Additionally, the application should be updated to the latest version or replaced with a more secure guestbook solution that properly implements access control measures. Network-level protections such as web application firewalls can also provide additional defense-in-depth measures, though they cannot fully compensate for the underlying authentication flaws in the vulnerable application.