CVE-2024-27570 in T300-T390
Summary
by MITRE • 03/01/2024
LBT T300-T390 v2.2.1.8 were discovered to contain a stack overflow via the ApCliSsid parameter in the generate_conf_router function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted POST request.
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Analysis
by VulDB Data Team • 03/05/2025
The vulnerability identified as CVE-2024-27570 affects LBT T300-T390 wireless routers running firmware version 2.2.1.8 and potentially other affected models within the same product line. This issue resides in the router's web interface configuration handling mechanism, specifically within the generate_conf_router function that processes incoming configuration parameters. The vulnerability manifests when the ApCliSsid parameter is manipulated in a crafted POST request, creating a condition where the router's stack memory becomes corrupted through buffer overflow exploitation. This represents a critical security flaw that can be exploited remotely without authentication requirements, making it particularly dangerous for network infrastructure devices.
The technical implementation of this vulnerability follows the classic stack buffer overflow pattern where insufficient input validation allows an attacker to write data beyond the allocated buffer boundaries in the router's memory space. The ApCliSsid parameter, which typically represents the wireless network name for access point client connections, becomes the attack vector when it receives input exceeding the predetermined buffer size. The generate_conf_router function fails to properly validate or sanitize the length of the ApCliSsid parameter before processing it, enabling attackers to craft malicious payloads that overwrite adjacent stack memory locations. This flaw directly maps to CWE-121 Stack-based Buffer Overflow, which is categorized under the broader category of CWE-119 Improper Access to Memory Location, representing a fundamental weakness in memory management practices within embedded systems.
The operational impact of CVE-2024-27570 extends beyond simple service disruption to potentially enable more sophisticated attack vectors within the network infrastructure. While the primary effect is a denial of service condition that renders the affected router unusable, the underlying memory corruption could theoretically allow for more advanced exploitation techniques such as arbitrary code execution or privilege escalation. The vulnerability affects network availability and reliability for all users connected through the compromised device, potentially disrupting business operations and creating security gaps that malicious actors could exploit to establish persistent network access. This vulnerability is particularly concerning for small to medium enterprises that rely on consumer-grade networking equipment for their infrastructure, as these devices often lack proper security hardening and are frequently deployed in unsecured environments.
Mitigation strategies for this vulnerability should focus on immediate firmware updates from the vendor, as the most effective solution requires addressing the root cause within the software implementation. Network administrators should implement network segmentation and access controls to limit exposure of affected devices to untrusted networks, while also monitoring for suspicious traffic patterns that might indicate exploitation attempts. The vulnerability aligns with ATT&CK technique T1210 Exploitation of Remote Services, where attackers leverage unpatched network services to gain unauthorized access or cause disruption. Organizations should also consider implementing network-based intrusion detection systems to monitor for the specific payload patterns associated with this vulnerability, and establish procedures for rapid response to potential exploitation attempts. Given the nature of embedded systems and their limited update capabilities, administrators should also consider network-level firewalls and access controls to prevent unauthorized access to the affected devices while permanent patches are being deployed.