CVE-2025-8204
BaseFortify
Publication date: 2025-07-26
Last updated on: 2026-04-29
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| comodo | dragon | to 134.0.6998.179 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-358 | The product does not implement or incorrectly implements one or more security-relevant checks as specified by the design of a standardized algorithm, protocol, or technique. |
| CWE-NVD-CWE-Other |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CVE-2025-8204 is a security vulnerability in the Comodo Dragon browser (up to version 134.0.6998.179) related to improper handling of HTTP Strict Transport Security (HSTS). Unlike standard browsers, Comodo Dragon disables HSTS by default, allowing users to bypass security warnings and connect to spoofed websites with invalid HTTPS certificates. Additionally, the browser has insecure communication in a built-in extension and is vulnerable to HTML injection attacks when combined with DNS spoofing. These flaws enable attackers to perform DNS spoofing, bypass HTTPS protections, and inject malicious scripts or phishing content into the browser. [1, 2, 3]
How can this vulnerability impact me? :
This vulnerability can impact users by allowing attackers to bypass HTTPS security protections, potentially leading to connections with spoofed or malicious websites without proper warnings. Attackers can perform DNS spoofing to redirect users to malicious servers, intercept or manipulate data due to insecure extension communication, and inject malicious scripts or phishing forms into the browser. This can result in compromised user security, exposure to phishing attacks, and execution of arbitrary code within the browser context. [1, 3]
How can this vulnerability be detected on my network or system? Can you suggest some commands?
Detection of this vulnerability involves monitoring for DNS spoofing attempts and unusual HTTPS certificate warnings bypassed by Comodo Dragon browser users. Since the vulnerability allows attackers to spoof HTTPS sites with invalid certificates and inject malicious scripts via DNS spoofing, you can detect it by checking for DNS anomalies and inspecting browser behavior. Commands to help detect DNS spoofing include: 1) Using 'nslookup' or 'dig' to verify DNS resolutions for critical domains (e.g., 'nslookup google.com' or 'dig google.com') and compare with expected IPs. 2) Monitoring network traffic for unexpected HTTP requests from the Comodo Dragon extension (which uses HTTP instead of HTTPS). 3) Using packet capture tools like 'tcpdump' or 'Wireshark' to detect HTTP traffic to suspicious IPs or domains. 4) Checking browser logs or network logs for instances where users bypass HTTPS warnings unusually often. However, no specific detection commands for the vulnerability itself are provided. [3]
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include: 1) Avoid using Comodo Dragon browser versions up to 134.0.6998.179, as no fixes or patches are currently available. 2) Replace Comodo Dragon with alternative browsers that properly enforce HSTS and HTTPS certificate validation, such as Chromium or Firefox. 3) Educate users not to bypass HTTPS warnings or click 'Proceed to website' on invalid certificate prompts. 4) Monitor and secure DNS settings to prevent DNS spoofing attacks, including protecting hosts files and using DNSSEC where possible. 5) Disable or remove the built-in 'IP / DNS Leakage Detector' extension if possible, or monitor its HTTP traffic for manipulation. Since the vendor has not provided any patches or countermeasures, replacing the affected product is the recommended approach. [2, 3]