CVE-2017-7912 in SRN-4000
Summary
by MITRE
Hanwha Techwin SRN-4000, SRN-4000 firmware versions prior to SRN4000_v2.16_170401, A specially crafted http request and response could allow an attacker to gain access to the device management page with admin privileges without proper authentication.
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Analysis
by VulDB Data Team • 08/27/2023
The vulnerability identified as CVE-2017-7912 affects Hanwha Techwin SRN-4000 series network appliances, specifically targeting firmware versions prior to SRN4000_v2.16_170401. This represents a critical authentication bypass flaw that allows remote attackers to access administrative functions without proper credentials, potentially compromising the entire network infrastructure. The affected devices operate as network security appliances that typically handle critical traffic filtering and management functions within enterprise environments.
The technical exploitation of this vulnerability stems from improper input validation within the HTTP request processing mechanism of the affected firmware. Attackers can craft specially formatted HTTP requests that manipulate the authentication flow, effectively bypassing the standard authentication checks required to access the device management interface. This flaw falls under the category of weak authentication mechanisms and improper access control, aligning with CWE-287 which addresses improper authentication vulnerabilities. The vulnerability specifically impacts the web-based management interface that typically requires administrative credentials to access configuration and control functions.
The operational impact of this vulnerability is severe as it enables unauthorized remote access to administrative functions of the network appliance. An attacker who successfully exploits this vulnerability can gain full administrative privileges to the device, allowing them to modify network configurations, disable security features, redirect traffic, or even establish persistent backdoors within the network infrastructure. This represents a significant threat to network security as the compromised device can become a pivot point for further attacks against internal network segments. The vulnerability particularly affects enterprise environments where these appliances are used for network perimeter protection and traffic management.
The exploitation of this vulnerability aligns with several techniques documented in the MITRE ATT&CK framework, particularly focusing on credential access and privilege escalation tactics. Attackers can leverage this flaw to move laterally within networks by using the compromised device as a trusted entry point. Organizations should consider implementing network segmentation strategies to limit the potential impact of such compromises. The vulnerability also highlights the importance of firmware update management and regular security assessments of network infrastructure components. Mitigation strategies should include immediate firmware upgrades to version SRN4000_v2.16_170401 or later, network monitoring for suspicious HTTP traffic patterns, and implementing additional access controls such as firewall rules restricting access to management interfaces from trusted networks only.