CVE-2004-0765: High severity Mozilla Thunderbird vulnerability

Published Aug 3, 2004
·
Updated

The certTestHostName function in Mozilla before 1.7, Firefox before 0.9, and Thunderbird before 0.7, only checks the hostname portion of a certificate when the hostname portion of the URI is not a fully qualified domain name (FQDN), which allows remote attackers to spoof trusted certificates.

Affected Software

3 affected components
Mozilla Thunderbird<=0.7
Mozilla Firefox<=0.9
Mozilla Mozilla<=1.7

Event History

Aug 3, 2004
CVE Published
via MITRE·08:00 AM
Data Sourced
via MITRE·08:00 AM
Description
Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the severity of CVE-2004-0765?

CVE-2004-0765 is considered a moderate severity vulnerability due to its potential to allow spoofing of trusted certificates.

2

How do I fix CVE-2004-0765?

To mitigate CVE-2004-0765, upgrade to Mozilla, Firefox, or Thunderbird versions that are newer than those specified in the vulnerability.

3

What software is affected by CVE-2004-0765?

CVE-2004-0765 affects Mozilla before version 1.7, Firefox before version 0.9, and Thunderbird before version 0.7.

4

What kind of attacks can exploit CVE-2004-0765?

CVE-2004-0765 can be exploited by remote attackers leveraging improperly validated hostnames to spoof trusted certificates.

5

Is CVE-2004-0765 present in the latest browser versions?

CVE-2004-0765 is not present in the latest versions of Mozilla, Firefox, or Thunderbird as they have patched this vulnerability.

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203