CVE-2020-24285 in Tip 200
Summary
by MITRE • 04/12/2021
INTELBRAS TELEFONE IP TIP200 version 60.61.75.22 allows an attacker to obtain sensitive information through /cgi-bin/cgiServer.exx.
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Analysis
by VulDB Data Team • 07/05/2026
The vulnerability identified as CVE-2020-24285 affects the INTELBRAS TELEFONE IP TIP200 device running firmware version 60.61.75.22, representing a critical information disclosure flaw that exposes sensitive system data to unauthenticated attackers. This vulnerability resides within the web interface component of the device, specifically through the /cgi-bin/cgiServer.exx endpoint which serves as a gateway for various administrative functions. The flaw enables remote attackers to extract confidential information without requiring any authentication credentials or prior access to the system, making it particularly dangerous in networked environments where such devices are deployed. The affected device operates as an IP telephone system that connects to enterprise networks, potentially providing attackers with access to internal communication infrastructure details and system configurations that could facilitate further exploitation.
The technical nature of this vulnerability stems from inadequate input validation and access control mechanisms within the cgiServer.exx application programming interface. The endpoint fails to properly authenticate or authorize external requests, allowing malicious actors to directly query system information through crafted HTTP requests. This weakness creates an information exposure condition that falls under the Common Weakness Enumeration category of CWE-200, which specifically addresses the improper exposure of sensitive information. The vulnerability is particularly concerning because it operates at the application layer, bypassing traditional network security controls that might otherwise prevent unauthorized access. Attackers can exploit this flaw by sending specially crafted requests to the vulnerable endpoint, potentially retrieving system logs, user credentials, network configuration details, or other sensitive data that should remain protected within the device's internal memory.
The operational impact of CVE-2020-24285 extends beyond simple information disclosure, as the exposed data could provide attackers with crucial insights for subsequent attacks within the network. An attacker who successfully exploits this vulnerability could gain knowledge about the device's internal structure, network topology, and potentially identify additional attack vectors or vulnerable components within the same network segment. The exposure of system information may enable advanced persistent threat actors to perform reconnaissance activities, map network infrastructure, or develop more sophisticated attack strategies against other connected devices. This vulnerability particularly impacts enterprise environments where IP telephony systems are integrated with critical business infrastructure, as the compromised device could serve as a foothold for lateral movement or as a source of credentials that might be used to access other network resources. The potential for privilege escalation or further exploitation increases significantly when attackers can obtain information about the device's configuration and operational parameters.
Mitigation strategies for this vulnerability should prioritize immediate firmware updates from INTELBRAS to address the underlying access control and input validation issues within the cgiServer.exx component. Network administrators should implement strict access controls and firewall rules that restrict access to the vulnerable endpoint, limiting connections to trusted IP addresses only. The principle of least privilege should be applied by ensuring that only authorized personnel can access the device's administrative interfaces, while network segmentation can help contain potential exploitation attempts. Security monitoring should be enhanced to detect unusual access patterns or attempts to query the vulnerable endpoint, with intrusion detection systems configured to alert on suspicious activity. Organizations should also consider implementing network access control measures that prevent unauthorized devices from connecting to the network and conducting regular vulnerability assessments to identify similar flaws in other networked devices. The ATT&CK framework categorizes this type of vulnerability under T1083 - File and Directory Discovery, as attackers can leverage the information disclosure to map system resources and identify potential targets for further exploitation within the compromised network environment.