CVE-2021-29969

Summary

If Thunderbird was configured to use STARTTLS for an IMAP connection, and an attacker injected IMAP server responses prior to the completion of the STARTTLS handshake, then Thunderbird didn't ignore the injected data. This could have resulted in Thunderbird showing incorrect information, for example the attacker could have tricked Thunderbird to show folders that didn't exist on the IMAP server. This vulnerability affects Thunderbird < 78.12.

Affected Software

VendorProductVersion RangeStatus
MozillaThunderbirdunspecified < 78.12affected

Weaknesses

  • IMAP server responses sent by a MITM prior to STARTTLS could be processed

ADP Enrichment

CVE Program Container

Additional References

References