Vulnerability Description
If Thunderbird is configured to use STARTTLS for an IMAP server, and the server sends a PREAUTH response, then Thunderbird will continue with an unencrypted connection, causing email data to be sent without protection. This vulnerability affects Thunderbird < 68.9.0.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Thunderbird | < 68.9.0 |
| Canonical | Ubuntu Linux | 16.04 |
Related Weaknesses (CWE)
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1613623Issue TrackingPermissions RequiredVendor Advisory
- https://usn.ubuntu.com/4421-1/Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-22/Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1613623Issue TrackingPermissions RequiredVendor Advisory
- https://usn.ubuntu.com/4421-1/Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-22/Vendor Advisory
FAQ
What is CVE-2020-12398?
CVE-2020-12398 is a vulnerability with a CVSS score of 7.5 (HIGH). If Thunderbird is configured to use STARTTLS for an IMAP server, and the server sends a PREAUTH response, then Thunderbird will continue with an unencrypted connection, causing email data to be sent w...
How severe is CVE-2020-12398?
CVE-2020-12398 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-12398?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Thunderbird, Canonical Ubuntu Linux.