CVE-2022-35264 in R1510
Summary
by MITRE • 10/25/2022
A denial of service vulnerability exists in the web_server hashFirst functionality of Robustel R1510 3.1.16 and 3.3.0. A specially-crafted network request can lead to denial of service. An attacker can send a sequence of requests to trigger this vulnerability.The `/action/import_aaa_cert_file/` API is affected by command injection vulnerability.
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Analysis
by VulDB Data Team • 11/25/2022
The CVE-2022-35264 vulnerability represents a critical security flaw affecting Robustel R1510 devices running firmware versions 3.1.16 and 3.3.0. This vulnerability manifests through two distinct but related attack vectors that together create a significant threat to network infrastructure devices. The primary issue lies within the web_server hashFirst functionality which processes incoming network requests without adequate input validation, creating a pathway for malicious actors to disrupt normal device operations. The vulnerability impacts the device's ability to maintain consistent service availability, potentially allowing attackers to render the network infrastructure unusable through carefully crafted network traffic patterns.
The technical implementation of this vulnerability stems from insufficient sanitization of user-supplied input within the web server component of the Robustel R1510 device. When processing requests to the `/action/import_aaa_cert_file/` API endpoint, the system fails to properly validate or escape input parameters, creating an environment where command injection attacks can succeed. This weakness directly maps to CWE-77 which describes command injection vulnerabilities where untrusted data is incorporated into system commands without proper validation. The flaw allows attackers to execute arbitrary commands on the underlying operating system, potentially compromising the entire device and its network services. The hashFirst functionality specifically processes these requests in a manner that does not adequately separate user input from executable code, creating an environment where malicious input can be interpreted as command instructions rather than data.
The operational impact of this vulnerability extends beyond simple denial of service, as it provides attackers with a potential foothold for more sophisticated attacks within the network infrastructure. When an attacker successfully triggers the command injection vulnerability, they can execute arbitrary code with the privileges of the web server process, which typically runs with elevated permissions. This could enable attackers to escalate their privileges, modify device configurations, access sensitive network data, or even use the compromised device as a pivot point for attacking other systems within the network. The sequential nature of the attack, requiring multiple requests to trigger the vulnerability, suggests that the exploitation process is designed to avoid detection by simple network monitoring systems, making it particularly dangerous for enterprise environments where such devices may be deployed.
Security professionals should implement immediate mitigations including network segmentation to isolate affected devices, disabling unnecessary API endpoints, and implementing robust input validation controls at the network perimeter. The vulnerability aligns with ATT&CK technique T1059 which describes command and scripting interpreter usage, and T1498 which covers network denial of service attacks. Organizations should also consider implementing intrusion detection systems that can identify patterns consistent with this attack methodology, particularly focusing on unusual sequences of requests to the affected API endpoint. Device firmware updates from Robustel should be prioritized as soon as available, though administrators should note that the vulnerability affects multiple firmware versions, suggesting that the underlying architectural flaw may require a more fundamental code review. Network administrators should also monitor for unusual traffic patterns that might indicate exploitation attempts and consider implementing rate limiting on API endpoints to prevent automated exploitation attempts.