CVE-2020-25078 Overview
CVE-2020-25078 is an information disclosure vulnerability affecting multiple D-Link DCS series IP cameras. The vulnerability exists in the /config/getuser endpoint, which fails to require authentication before returning sensitive user configuration data. An unauthenticated remote attacker can exploit this endpoint to retrieve administrator credentials in plaintext, leading to complete device compromise.
Critical Impact
This vulnerability allows unauthenticated remote attackers to obtain administrator passwords from affected D-Link cameras, enabling full device takeover and potential use in botnet operations. This vulnerability is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, indicating active exploitation in the wild.
Affected Products
- D-Link DCS-2530L (firmware before 1.06.01 Hotfix)
- D-Link DCS-2670L (firmware through 2.02)
- D-Link DCS-4603
- D-Link DCS-4622
- D-Link DCS-4701E
- D-Link DCS-4703E
- D-Link DCS-4705E
- D-Link DCS-4802E
- D-Link DCS-P703
Discovery Timeline
- 2020-09-02 - CVE-2020-25078 published to NVD
- 2025-11-07 - Last updated in NVD database
Technical Details for CVE-2020-25078
Vulnerability Analysis
This vulnerability represents a critical authentication bypass in the web management interface of affected D-Link IP cameras. The /config/getuser endpoint is designed to retrieve user account information, including administrator credentials. However, the endpoint fails to implement proper authentication checks, allowing any network-accessible attacker to query this endpoint without providing valid credentials.
When exploited, the vulnerable endpoint returns the administrator username and password in cleartext. This information disclosure is particularly severe because it directly leads to full administrative access to the camera, enabling attackers to modify device settings, access live video feeds, pivot to other network resources, or enlist the device in IoT botnets.
The vulnerability is classified under CWE-NVD-CWE-noinfo, though it fundamentally represents broken access control and missing authentication for a critical function. The attack requires no user interaction and can be executed remotely over the network by any attacker who can reach the camera's web interface.
Root Cause
The root cause of CVE-2020-25078 is the absence of authentication enforcement on the /config/getuser endpoint within the camera's embedded web server. This represents a design flaw where a sensitive administrative endpoint was exposed without implementing the necessary access controls. The firmware developers failed to apply authentication middleware or session validation to this particular API route, despite it handling highly sensitive credential data.
Attack Vector
An attacker can exploit this vulnerability by sending a simple HTTP GET request to the /config/getuser endpoint on an affected D-Link camera. The attack is trivial to execute and requires no authentication, no valid session, and no user interaction.
The exploitation flow is straightforward:
- The attacker identifies a vulnerable D-Link DCS camera accessible over the network
- A direct HTTP request is sent to the /config/getuser endpoint
- The camera responds with administrator credentials in plaintext
- The attacker uses these credentials to gain full administrative control
Due to the simplicity of exploitation and the high value of the disclosed information, this vulnerability is highly attractive for IoT botnet operators and opportunistic attackers scanning for vulnerable devices.
Detection Methods for CVE-2020-25078
Indicators of Compromise
- HTTP GET requests to /config/getuser endpoint from external or unauthorized IP addresses
- Unusual administrative login activity following credential disclosure
- Configuration changes made to the camera by unauthorized users
- Network scanning activity targeting D-Link camera web interfaces on common ports (80, 443)
Detection Strategies
- Monitor network traffic for HTTP requests containing /config/getuser in the URI path
- Implement IDS/IPS rules to detect and alert on access attempts to the vulnerable endpoint
- Review web server logs on D-Link cameras for requests to configuration endpoints
- Deploy network monitoring to identify reconnaissance activity targeting IoT devices
Monitoring Recommendations
- Segment IoT devices including IP cameras on isolated network VLANs to limit exposure
- Configure firewall rules to restrict access to camera web interfaces from trusted management networks only
- Enable logging on network devices to capture traffic to and from IoT endpoints
- Implement anomaly detection for unusual credential usage or configuration changes on camera devices
How to Mitigate CVE-2020-25078
Immediate Actions Required
- Apply the firmware hotfix released by D-Link for affected DCS camera models immediately
- Restrict network access to camera management interfaces using firewall rules or VLANs
- Change administrator passwords on all affected devices after patching
- Audit camera configurations for unauthorized changes that may indicate prior compromise
- Consider replacing end-of-life devices that will not receive firmware updates
Patch Information
D-Link has released firmware updates to address this vulnerability. For the DCS-2530L, update to firmware version 1.06.01 Hotfix or later. For other affected models, consult the D-Link Security Advisory SAP10180 for specific firmware versions and download links. Additional product support information is available from the D-Link Support Portal.
Workarounds
- Isolate affected cameras from the internet and untrusted networks until patching is complete
- Implement network-level access controls to restrict access to the camera's web interface to authorized management systems only
- Deploy a reverse proxy or web application firewall in front of camera interfaces to block requests to the /config/getuser endpoint
- Disable remote management features if not required for operations
- Monitor for exploitation attempts using network intrusion detection systems
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
