CVE-2021-38502
Mozilla: Downgrade attack on SMTP STARTTLS connections
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
Thunderbird ignoró la configuración para requerir seguridad STARTTLS para una conexión SMTP. Un MITM podría llevar a cabo un ataque de degradación para interceptar los mensajes transmitidos, o podría tomar el control de la sesión autenticada para ejecutar los comandos SMTP elegidos por el MITM. Si es configurado un método de autenticación no protegido, el MITM podría obtener también las credenciales de autenticación. Esta vulnerabilidad afecta a Thunderbird versiones anteriores a 91.2
Multiple security issues were discovered in Thunderbird. If a user were tricked into opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, trick a user into accepting unwanted permissions, conduct header splitting attacks, conduct spoofing attacks, bypass security restrictions, confuse the user, or execute arbitrary code.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2021-08-10 CVE Reserved
- 2021-10-13 CVE Published
- 2024-08-04 CVE Updated
- 2025-04-13 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-319: Cleartext Transmission of Sensitive Information
CAPEC
References (5)
URL | Tag | Source |
---|---|---|
https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html | Mailing List |
|
URL | Date | SRC |
---|
URL | Date | SRC |
---|
URL | Date | SRC |
---|---|---|
https://www.debian.org/security/2022/dsa-5034 | 2022-07-12 | |
https://www.mozilla.org/security/advisories/mfsa2021-47 | 2022-07-12 | |
https://access.redhat.com/security/cve/CVE-2021-38502 | 2021-10-13 | |
https://bugzilla.redhat.com/show_bug.cgi?id=2013469 | 2021-10-13 |
Affected Vendors, Products, and Versions
Vendor | Product | Version | Other | Status | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
Mozilla Search vendor "Mozilla" | Thunderbird Search vendor "Mozilla" for product "Thunderbird" | < 91.2 Search vendor "Mozilla" for product "Thunderbird" and version " < 91.2" | - |
Affected
| ||||||
Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0" | - |
Affected
| ||||||
Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0" | - |
Affected
| ||||||
Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 11.0 Search vendor "Debian" for product "Debian Linux" and version "11.0" | - |
Affected
|