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CVE-2020-12398

Date: July 9, 2020

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.

Severity Score

Related Resources (8)

https://bugzilla.mozilla.org/show_bug.cgi?id=1613623
https://access.redhat.com/security/cve/CVE-2020-12398
https://nvd.nist.gov/vuln/detail/CVE-2020-12398
https://www.mozilla.org/security/advisories/mfsa2020-22/
https://usn.ubuntu.com/4421-1/
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-12398
https://security-tracker.debian.org/tracker/CVE-2020-12398
https://www.mend.io/vulnerability-database/CVE-2020-12398

Severity Score

Weakness Type (CWE)

Cleartext Transmission of Sensitive Information

CWE-319

Missing Encryption of Sensitive Data

CWE-311

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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