CVE-2021-38502

Summary

Thunderbird ignored the configuration to require STARTTLS security for an SMTP connection. A MITM could perform a downgrade attack to intercept transmitted messages, or could take control of the authenticated session to execute SMTP commands chosen by the MITM. If an unprotected authentication method was configured, the MITM could obtain the authentication credentials, too. This vulnerability affects Thunderbird < 91.2.

Affected Software

VendorProductVersion RangeStatus
MozillaThunderbirdunspecified < 91.2affected

Weaknesses

  • Downgrade attack on SMTP STARTTLS connections

ADP Enrichment

CVE Program Container

Additional References

References