CVE-2019-6319 in DeskJet 3630
Summary
by MITRE
HP DeskJet 3630 All-in-One Printers models F5S43A - F5S57A, K4T93A - K4T99C, K4U00B - K4U03B, and V3F21A - V3F22A (firmware version SWP1FN1912BR or higher) have a Cross-Site Request Forgery (CSRF) vulnerability that could lead to a denial of service (DOS) or device misconfiguration.
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Analysis
by VulDB Data Team • 01/10/2020
The CVE-2019-6319 vulnerability affects HP DeskJet 3630 All-in-One printers across multiple firmware versions, representing a critical cross-site request forgery flaw that undermines the security posture of these network-connected devices. This vulnerability resides within the web-based management interface of the affected printers, which exposes administrative functions through HTTP endpoints that lack proper authentication mechanisms. The flaw allows an attacker to craft malicious requests that, when executed by a victim who is authenticated to the printer's web interface, can manipulate device configuration settings without proper authorization. The vulnerability impacts the device's operational integrity by enabling unauthorized changes to critical printer parameters, potentially leading to service disruption or complete device misconfiguration. The affected firmware versions SWP1FN1912BR and higher indicate that this vulnerability has been present for several firmware releases, suggesting a prolonged window of exposure for users of these devices. This issue directly violates the principle of least privilege and authentication controls that should protect administrative functions from unauthorized access.
The technical implementation of this CSRF vulnerability stems from the absence of anti-forgery tokens or other validation mechanisms within the printer's web interface. When legitimate users access the printer's management page, the device fails to verify the origin of administrative requests, allowing attackers to leverage the user's existing authenticated session to perform unauthorized operations. The attack vector typically involves tricking a logged-in user into visiting a malicious website or clicking on a compromised link that automatically submits requests to the printer's administrative endpoints. This flaw specifically targets the printer's configuration APIs and administrative functions, which are accessible through standard HTTP methods without proper session validation. The vulnerability can be exploited to modify network settings, change print job configurations, or disable critical device functions, potentially leading to complete service interruption. According to CWE-352, this represents a classic cross-site request forgery vulnerability where the application fails to validate that requests originate from the legitimate user interface rather than from external malicious sources.
The operational impact of this vulnerability extends beyond simple denial of service conditions to encompass potential device compromise and service disruption that could affect business operations. Organizations relying on these printers for document management may experience unexpected print failures, configuration drift, or complete device unavailability if attackers successfully exploit this vulnerability. The risk is particularly elevated in environments where users have unrestricted access to the network and where the printers are configured with default or weak authentication credentials. The vulnerability can be exploited by attackers who have access to the local network or through social engineering techniques that convince users to interact with malicious content. From an attacker's perspective, this vulnerability aligns with ATT&CK technique T1210 - Exploitation of Remote Services, as it leverages the printer's web interface to gain unauthorized administrative access. The potential for device misconfiguration could result in permanent service degradation or require costly device replacement if critical system parameters are altered.
Mitigation strategies for CVE-2019-6319 should prioritize immediate firmware updates from HP to address the identified CSRF vulnerability in the affected printer models. Organizations should implement network segmentation to isolate printer devices from general user networks and restrict access to printer management interfaces through firewall rules and access control lists. The implementation of network monitoring solutions can help detect unusual patterns of administrative requests that may indicate exploitation attempts. Users should be educated about the risks of visiting untrusted websites and clicking on suspicious links that could trigger CSRF attacks against their networked devices. Regular security audits of networked printer devices should include verification of firmware versions and assessment of web interface configurations to ensure that administrative functions are properly protected. Network administrators should consider disabling unnecessary web services on printer devices and implementing strong authentication mechanisms for any remaining administrative access points. The vulnerability also highlights the importance of maintaining up-to-date device firmware and implementing robust security practices for all network-connected IoT devices. Organizations should establish procedures for regularly checking for and applying security patches to prevent exploitation of known vulnerabilities.