Overview
CVE-2019-25226 describes an unauthenticated configuration disclosure vulnerability affecting Dongyoung Media DM-AP240T/W wireless access points. This vulnerability allows a remote attacker to retrieve a compressed configuration archive from the /cgi-bin/sys_system_config management endpoint without needing any authentication. The configuration archive can contain sensitive information, including administrative credentials, network settings, and other security-related parameters. Exploiting this vulnerability could allow an attacker to gain unauthorized access to the device and potentially the entire network.
Technical Details
The vulnerability resides in the web management interface of the Dongyoung Media DM-AP240T/W access points. Specifically, the /cgi-bin/sys_system_config endpoint is accessible without requiring any authentication or authorization. When accessed, this endpoint serves a compressed archive containing the device’s configuration files. Analysis of these configuration files reveals that they often include plaintext passwords and other sensitive configuration details used to manage the device and network.
The lack of authentication on this endpoint allows any attacker with network access to the device to download the configuration archive. The archive’s contents are typically not encrypted, making it easy to extract the sensitive information.
CVSS Analysis
While the CVE entry lists the Severity and CVSS score as N/A, given the nature of the vulnerability, a proper assessment would likely result in a High severity rating. A remote unauthenticated attacker can retrieve sensitive information including credentials. A potential CVSS score would likely fall between 7.5 and 9.0 depending on the attack vector and scope, considering the confidentiality impact.
Possible Impact
The impact of CVE-2019-25226 can be significant:
- Compromised Device Access: Exposed administrative credentials allow attackers to gain full control of the access point.
- Network Intrusions: Attackers can use the exposed network settings to gain unauthorized access to the wider network.
- Data Breaches: Sensitive data transmitted through the compromised access point could be intercepted.
- Denial of Service: Attackers could modify the configuration of the access point, leading to a denial-of-service condition.
Mitigation and Patch Steps
Unfortunately, as of this writing, a dedicated patch from Dongyoung Media may not be readily available. Here are some mitigation strategies:
- Restrict Network Access: Limit access to the access point’s management interface to trusted IP addresses only (if possible within the device’s configuration).
- Firewall Rules: Implement firewall rules to block unauthorized access to the access point from untrusted networks.
- Configuration Review: Regularly review the access point’s configuration to ensure that strong passwords are used and that unnecessary services are disabled.
- Device Replacement: If possible, consider replacing the vulnerable DM-AP240T/W access points with newer, more secure models from a different vendor.
- Network Segmentation: Implement network segmentation to limit the impact of a potential compromise. Isolate the vulnerable device from critical network resources.
