// For flags

CVE-2021-4126

 

Severity Score

6.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

When receiving an OpenPGP/MIME signed email message that contains an additional outer MIME message layer, for example a message footer added by a mailing list gateway, Thunderbird only considered the inner signed message for the signature validity. This gave the false impression that the additional contents were also covered by the digital signature. Starting with Thunderbird version 91.4.1, only the signature that belongs to the top level MIME part will be considered for the displayed status. This vulnerability affects Thunderbird < 91.4.1.

Al recibir un mensaje de correo electrónico firmado con OpenPGP/MIME que contiene una capa de mensaje MIME externa adicional, por ejemplo un pie de página de mensaje agregado por una puerta de enlace de lista de correo, Thunderbird solo consideró el mensaje firmado interno para la validez de la firma. Esto daba la falsa impresión de que los contenidos adicionales también estaban cubiertos por la firma digital. A partir de la versión 91.4.1 de Thunderbird, solo se considerará para el estado mostrado la firma que pertenece a la parte MIME de nivel superior. Esta vulnerabilidad afecta a Thunderbird &lt; 91.4.1.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-12-16 CVE Reserved
  • 2022-01-21 CVE Published
  • 2024-07-14 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
CAPEC
References (1)
URL Tag Source
URL Date SRC
URL Date SRC
URL Date SRC
https://www.mozilla.org/security/advisories/mfsa2021-55 2023-01-04
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"
 < 91.4.1
Search vendor "Mozilla" for product "Thunderbird" and version " < 91.4.1"
-
Affected