CVE-2019-6320 in DeskJet 3630
Summary
by MITRE
Certain 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 vulnerability identified as CVE-2019-6320 affects specific HP DeskJet 3630 All-in-One printer models within a defined firmware version range, representing a critical cross-site request forgery flaw that undermines the security posture of these network-connected devices. This vulnerability resides in the web-based management interface of the affected printers, which fails to properly validate and authenticate requests originating from external sources. The affected firmware versions SWP1FN1912BR and higher indicate that this flaw was introduced or became exploitable within a specific software release cycle, suggesting that the printer's web server component lacks adequate CSRF protection mechanisms.
The technical implementation of this vulnerability stems from the absence of proper request origin verification and anti-CSRF token validation within the printer's web interface. When a user interacts with the printer's management web page, the system should validate that requests are legitimate and originate from authorized sources. However, the affected models fail to implement robust CSRF protection measures, allowing malicious actors to craft specially crafted requests that can be executed without the user's knowledge or consent. This flaw operates under CWE-352, which specifically addresses cross-site request forgery vulnerabilities where web applications fail to validate the source of HTTP requests.
The operational impact of this vulnerability extends beyond simple denial of service conditions to encompass potential device misconfiguration scenarios that could severely compromise printer functionality and network security. An attacker capable of exploiting this vulnerability could potentially disrupt printing services, alter printer settings, or even redirect print jobs to unintended destinations. The denial of service aspect could render the printer completely unusable for legitimate users while the misconfiguration component could lead to unauthorized access to network resources or compromise of the printer's internal configuration parameters. This represents a significant risk in enterprise environments where printers serve as entry points for broader network attacks.
From a cybersecurity perspective, this vulnerability aligns with ATT&CK framework techniques related to initial access and privilege escalation through network device compromise. The affected printers, being network-connected devices, provide a potential attack surface that could be leveraged to establish persistent access points within corporate networks. The lack of CSRF protection in these devices means that attackers could potentially exploit this vulnerability through social engineering campaigns where users are tricked into visiting malicious websites that automatically submit requests to the vulnerable printer. Organizations should consider implementing network segmentation strategies to isolate these devices from critical network segments and establish monitoring protocols to detect unauthorized configuration changes.
The mitigation strategy for this vulnerability primarily involves firmware updates provided by HP to address the CSRF implementation flaws. Organizations should immediately assess their printer inventory to identify all affected models and firmware versions, then implement the necessary firmware updates to resolve the vulnerability. Additionally, network administrators should consider implementing additional protective measures such as disabling web management interfaces when not actively needed, implementing network access controls to restrict access to printer management interfaces, and establishing regular monitoring procedures to detect unauthorized configuration changes. The vulnerability highlights the importance of securing all network-connected devices, particularly those with web interfaces, as these often represent overlooked attack vectors in enterprise security programs.