CVE-2022-35261 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_authorized_keys/` API is affected by command injection vulnerability.
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Analysis
by VulDB Data Team • 10/26/2022
The vulnerability identified as CVE-2022-35261 represents a critical security flaw affecting Robustel R1510 devices running firmware versions 3.1.16 and 3.3.0. This issue manifests through two distinct but related attack vectors that together create a significant threat landscape for affected systems. The primary vulnerability involves a denial of service condition within the web_server hashFirst functionality, while a secondary command injection vulnerability exists within the /action/import_authorized_keys/ API endpoint. Both vulnerabilities stem from inadequate input validation and sanitization mechanisms within the device's web interface, creating pathways for malicious actors to disrupt normal operations and potentially execute arbitrary code.
The technical implementation of this vulnerability exploits weaknesses in how the Robustel R1510 processes network requests through its web server component. The hashFirst functionality appears to improperly handle certain hash values or request parameters, allowing attackers to craft specific sequences of network traffic that cause the web server to crash or become unresponsive. This behavior aligns with CWE-400, which categorizes unchecked resource consumption as a vulnerability that can lead to denial of service conditions. The command injection vulnerability within the /action/import_authorized_keys/ API presents a more severe risk, as it allows attackers to inject malicious commands that can be executed with the privileges of the web server process. This particular weakness corresponds to CWE-77, which describes command injection flaws where user-supplied data is directly incorporated into command execution without proper sanitization.
The operational impact of CVE-2022-35261 extends beyond simple service disruption to potentially compromise the entire security posture of affected network infrastructure. Organizations utilizing Robustel R1510 devices in critical network operations face risks of extended outages that could impact network connectivity, remote access capabilities, and overall system availability. The command injection component creates additional concerns as it may enable attackers to gain unauthorized access to system resources, potentially allowing for privilege escalation, data exfiltration, or further network reconnaissance. According to ATT&CK framework domain T1499, this vulnerability could facilitate service disruption and system compromise through various attack paths including command execution and denial of service. The combination of these two vulnerabilities creates a particularly dangerous scenario where an attacker could first establish a foothold through command injection and then maintain persistent access while simultaneously disrupting services through the denial of service mechanism.
Mitigation strategies for CVE-2022-35261 should prioritize immediate firmware updates from Robustel to address the identified vulnerabilities. Organizations should also implement network segmentation to limit access to affected devices, particularly restricting direct internet access to the web interface. The implementation of web application firewalls and input validation controls can provide additional protection layers against exploitation attempts. Security teams should monitor network traffic for suspicious patterns that might indicate exploitation attempts, particularly focusing on unusual request sequences to the affected API endpoints. Regular vulnerability assessments and penetration testing should be conducted to identify potential additional attack vectors within the network infrastructure. Organizations should also establish incident response procedures specifically tailored to address denial of service and command injection scenarios, ensuring rapid response capabilities to minimize operational impact and prevent further compromise of affected systems.