CVE-2025-8205: Comodo Dragon Browser Exposes Sensitive Information via DNS Leakage
TL;DR: A vulnerability in Comodo Dragon browser allows for the cleartext transmission of sensitive information through DNS leakage. While difficult to exploit, this flaw can expose user data. Users should consider alternative browsers or monitor network activity.
Vulnerability Details
- CVE ID: CVE-2025-8205
- Description: Comodo Dragon up to version 134.0.6998.179 is vulnerable to DNS leakage in its IP DNS Leakage Detector component. This results in the cleartext transmission of sensitive information.
- CVSS Score: 3.7 (LOW)
- CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
- CVSS v3.1 Explanation: This vulnerability has a low severity rating. The attack vector is over the network and requires high attack complexity. No privileges or user interaction are needed. The confidentiality impact is low, meaning some sensitive information may be exposed, but integrity and availability are not affected.
- CVSS v4.0 Score: 6.3 (MEDIUM)
- CVSS Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- CVSS v4.0 Explanation: This vulnerability has a medium severity rating with a proof of concept exploit available. The attack vector is over the network and requires high attack complexity. No privileges or user interaction are needed. The confidentiality impact is low, meaning some sensitive information may be exposed.
- Exploit Requirements: Exploitation is considered difficult.
- Affected Vendor: Comodo
- Affected Product: Dragon
- Affected Version: Up to 134.0.6998.179
- CWE: CWE-310 (Cryptographic Issues) and CWE-319 (Cleartext Transmission of Sensitive Information). CWE-310 indicates problems with the use of cryptography, while CWE-319 specifically describes the transmission of sensitive data in an unencrypted format.
Timeline of Events
- 2025-07-26: Vulnerability reported to VulDB.
- 2025-07-26: CVE ID assigned.
Exploitability & Real-World Risk
While the complexity of exploiting this vulnerability is high, the potential impact is still a concern. DNS leakage can reveal browsing history, location data, and other sensitive information to malicious actors. This information can be used for targeted phishing attacks, identity theft, or other malicious activities. The existence of a public exploit increases the risk.
Recommendations
- Upgrade: Upgrade to a patched version of Comodo Dragon, if available. Check the Comodo website for updates. However, the vendor did not respond to the initial disclosure, so updates may be unlikely.
- Use a VPN: Employ a Virtual Private Network (VPN) to encrypt your internet traffic and prevent DNS leakage.
- Alternative Browser: Consider switching to a more secure browser with built-in DNS leak protection.
- Monitor Network Activity: Monitor your network traffic for unusual DNS requests or connections.
Technical Insight
The vulnerability stems from how Comodo Dragon handles DNS requests. Instead of using encrypted channels, the browser may send DNS queries in cleartext, allowing attackers to intercept and read this information. This is particularly problematic when accessing sensitive websites or services.
Credit to Researcher(s)
This vulnerability was reported by FMISec.
References
Tags
CVE-2025-8205, Comodo Dragon, DNS Leakage, Security, Vulnerability, Cleartext Transmission
Summary: Comodo Dragon browser is vulnerable to DNS leakage, potentially exposing sensitive user data through cleartext transmission. The vulnerability is rated as low severity, but users are advised to take precautions such as using a VPN or switching to a more secure browser.
CVE ID: CVE-2025-8205
Risk Analysis: Successful exploitation can lead to the exposure of sensitive user information, such as browsing history and location data, potentially leading to targeted attacks and identity theft.
Recommendation: Users are advised to use a VPN, switch to a more secure browser, and monitor their network activity for unusual DNS requests.
Timeline
- 2025-07-26: Vulnerability reported to VulDB and CVE ID assigned.