Vulnerability Description
By encoding Unicode whitespace characters within the From email header, an attacker can spoof the sender email address that Thunderbird displays. This vulnerability affects Thunderbird < 68.8.0.
CVSS Score
4.3
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Thunderbird | < 68.8.0 |
| Canonical | Ubuntu Linux | 16.04 |
Related Weaknesses (CWE)
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1617370Issue TrackingPatchVendor Advisory
- https://security.gentoo.org/glsa/202005-03Third Party Advisory
- https://usn.ubuntu.com/4373-1/Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-18/Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1617370Issue TrackingPatchVendor Advisory
- https://security.gentoo.org/glsa/202005-03Third Party Advisory
- https://usn.ubuntu.com/4373-1/Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-18/Vendor Advisory
FAQ
What is CVE-2020-12397?
CVE-2020-12397 is a vulnerability with a CVSS score of 4.3 (MEDIUM). By encoding Unicode whitespace characters within the From email header, an attacker can spoof the sender email address that Thunderbird displays. This vulnerability affects Thunderbird < 68.8.0.
How severe is CVE-2020-12397?
CVE-2020-12397 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-12397?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Thunderbird, Canonical Ubuntu Linux.