Vulnerability · Published Jul 9, 2020 · Assigned by mozilla
CVE-2020-12398
High 7.5
In plain English
A high-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 1.0% (higher than 62% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.5High
Exploit odds (30 days)1.0%top 37.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | thunderbird | 68.9.0-r0 | ALPINE-CVE-2020-12398 |
| Alpine:v3.21 | thunderbird | 68.9.0-r0 | ALPINE-CVE-2020-12398 |
| Alpine:v3.22 | thunderbird | 68.9.0-r0 | ALPINE-CVE-2020-12398 |
| Alpine:v3.23 | thunderbird | 68.9.0-r0 | ALPINE-CVE-2020-12398 |
| Debian:12 | thunderbird | 1:68.9.0-1 | DEBIAN-CVE-2020-12398 |
| Debian:13 | thunderbird | 1:68.9.0-1 | DEBIAN-CVE-2020-12398 |
| Debian:14 | thunderbird | 1:68.9.0-1 | DEBIAN-CVE-2020-12398 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Thunderbird | unspecified – before 68.9.0 |
References
- https://www.mozilla.org/security/advisories/mfsa2020-22/ x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1613623 x_refsource_MISC
- USN-4421-1 vendor-advisory, x_refsource_UBUNTU