CVE-2001-1039 in JetAdmin
Summary
by MITRE
The JetAdmin web interface for HP JetDirect does not set a password for the telnet interface when the admin password is changed, which allows remote attackers to gain access to the printer.
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Analysis
by VulDB Data Team • 05/21/2019
The vulnerability described in CVE-2001-1039 represents a critical security flaw in HP JetDirect print server implementations that undermines fundamental network security controls. This issue affects the JetAdmin web interface component of HP JetDirect devices, which are network-attached printing solutions that allow administrators to manage printer configurations remotely. The vulnerability stems from a design flaw where the system fails to synchronize authentication credentials across different administrative interfaces, creating a persistent security weakness that can be exploited by unauthorized parties.
The technical implementation flaw occurs when administrators modify the administrative password through the web interface, as the system does not automatically update the corresponding telnet interface credentials. This creates a scenario where the web administration interface becomes secured with a new password while the underlying telnet service retains its original default or previously configured credentials. The vulnerability falls under the category of credential mismanagement and authentication bypass, with direct implications for access control mechanisms. According to CWE classification, this represents a weakness in password management and credential synchronization, specifically CWE-256 which addresses the presence of weak or unenforced password policies.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass potential full system compromise and data exposure. Remote attackers who discover this credential mismatch can exploit the telnet interface to gain administrative privileges on the printer, potentially leading to printer configuration modifications, document interception, or even printer firmware manipulation. The telnet protocol, being inherently insecure and lacking encryption, combined with the persistent weak credentials creates a significant attack surface that aligns with ATT&CK technique T1075 which covers the use of legitimate credentials for lateral movement and system access. This vulnerability particularly affects organizations relying on HP JetDirect printers for networked printing services, as it undermines the security boundaries that should protect these devices from unauthorized access.
Mitigation strategies for this vulnerability should focus on immediate credential synchronization and access control hardening. Organizations must ensure that all administrative interfaces on HP JetDirect devices maintain consistent authentication credentials, with the web interface updates automatically propagating to all underlying services including telnet. The recommended approach includes disabling unnecessary services such as telnet where possible, implementing network segmentation to isolate printer networks, and ensuring that all administrative access occurs through secure encrypted channels. Additionally, regular security assessments should verify that credential changes are properly synchronized across all interfaces, and organizations should consider upgrading to newer printer management solutions that properly handle credential consistency. This vulnerability demonstrates the critical importance of maintaining authentication consistency across all administrative interfaces and serves as a reminder that legacy systems often contain hidden security flaws that can be exploited by determined attackers.