Vulnerability · Published May 22, 2020 · Assigned by mozilla
CVE-2020-12397
Medium 4.3
In plain English
A medium-severity security flaw in Thunderbird from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)4.3Medium
Exploit odds (30 days)0.6%top 50.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | thunderbird | 68.8.0-r0 | ALPINE-CVE-2020-12397 |
| Alpine:v3.21 | thunderbird | 68.8.0-r0 | ALPINE-CVE-2020-12397 |
| Alpine:v3.22 | thunderbird | 68.8.0-r0 | ALPINE-CVE-2020-12397 |
| Alpine:v3.23 | thunderbird | 68.8.0-r0 | ALPINE-CVE-2020-12397 |
| Debian:12 | thunderbird | 1:68.8.0-1 | DEBIAN-CVE-2020-12397 |
| Debian:13 | thunderbird | 1:68.8.0-1 | DEBIAN-CVE-2020-12397 |
| Debian:14 | thunderbird | 1:68.8.0-1 | DEBIAN-CVE-2020-12397 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Thunderbird | unspecified – before 68.8.0 |
References
- https://www.mozilla.org/security/advisories/mfsa2020-18/ x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1617370 x_refsource_MISC
- USN-4373-1 vendor-advisory, x_refsource_UBUNTU
- https://security.gentoo.org/glsa/202005-03 x_refsource_MISC