CVEvulnerability
CVE-2021-29969
5.9 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2021-08-05
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.9 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- CVSS 2.0 ([email protected])
- 4.3 MEDIUM — AV:N/AC:M/Au:N/C:P/I:N/A:N
- Weaknesses
- CWE-552
Description
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 configurations
• mozilla thunderbird (< 78.12)
Related
Weakness · CWE (1)
- CWE-552 Files or Directories Accessible to External Parties weakness
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1682370 Issue Tracking, Permissions Required, Vendor Advisory
- https://security.gentoo.org/glsa/202208-14 Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-30/ Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1682370 Issue Tracking, Permissions Required, Vendor Advisory
- https://security.gentoo.org/glsa/202208-14 Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-30/ Vendor Advisory