CVE-2002-1019 in Content Server
Summary
by MITRE
The library feature for Adobe Content Server 3.0 allows a remote attacker to check out an eBook for an arbitrary length of time via a modified loanMin parameter to download.asp.
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Analysis
by VulDB Data Team • 04/18/2019
The vulnerability identified as CVE-2002-1019 represents a critical security flaw in Adobe Content Server 3.0's library management system that exposes eBook lending mechanisms to unauthorized manipulation. This issue specifically targets the download.asp component where the loanMin parameter controls the minimum loan period for digital content. The flaw allows remote attackers to manipulate this parameter to extend eBook checkout periods indefinitely, effectively bypassing the intended lending restrictions that protect digital intellectual property. The vulnerability operates through a simple parameter modification attack vector that requires no authentication or specialized tools beyond basic web interaction capabilities.
The technical implementation of this vulnerability stems from inadequate input validation and parameter sanitization within the Adobe Content Server's loan management system. When the loanMin parameter is submitted through the download.asp interface, the system fails to properly validate or sanitize user-supplied input before processing the loan extension request. This lack of proper input validation creates a classic case of insecure parameter handling that falls under the CWE-20 category of "Improper Input Validation." The flaw enables attackers to submit arbitrary values for the loanMin parameter, allowing them to set extended checkout periods that could range from days to years, effectively granting permanent access to purchased content.
The operational impact of this vulnerability extends beyond simple content theft, creating significant financial and security implications for publishers and content providers using Adobe Content Server. Attackers can exploit this weakness to download and retain access to copyrighted materials indefinitely, potentially leading to widespread piracy and revenue loss for content creators. The remote nature of the attack means that malicious actors do not require physical access to the system or network, making it particularly dangerous for organizations that rely on digital rights management for their business models. This vulnerability directly impacts the integrity of digital lending systems and undermines the trust between content providers and consumers in digital distribution environments.
Organizations affected by this vulnerability should implement immediate mitigations including patching the Adobe Content Server to the latest available version that addresses this specific parameter validation flaw. Network segmentation and access controls should be implemented to limit exposure of the download.asp endpoint to unauthorized users. Additionally, monitoring systems should be configured to detect unusual patterns in loan extension requests that might indicate exploitation attempts. The vulnerability demonstrates the importance of proper input validation and parameter sanitization in web applications, aligning with ATT&CK technique T1212 for "Exploitation for Credential Access" and emphasizing the need for robust application security controls. Organizations should also consider implementing additional digital rights management measures such as content encryption and periodic access verification to further protect against similar exploitation vectors.