// For flags

CVE-2021-44549

SMTPS server hostname not checked when making TLS connection to SMTPS server

Severity Score

7.4
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Apache Sling Commons Messaging Mail provides a simple layer on top of JavaMail/Jakarta Mail for OSGi to send mails via SMTPS. To reduce the risk of "man in the middle" attacks additional server identity checks must be performed when accessing mail servers. For compatibility reasons these additional checks are disabled by default in JavaMail/Jakarta Mail. The SimpleMailService in Apache Sling Commons Messaging Mail 1.0 lacks an option to enable these checks for the shared mail session. A user could enable these checks nevertheless by accessing the session via the message created by SimpleMessageBuilder and setting the property mail.smtps.ssl.checkserveridentity to true. Apache Sling Commons Messaging Mail 2.0 adds support for enabling server identity checks and these checks are enabled by default. - https://javaee.github.io/javamail/docs/SSLNOTES.txt - https://javaee.github.io/javamail/docs/api/com/sun/mail/smtp/package-summary.html - https://github.com/eclipse-ee4j/mail/issues/429

Apache Sling Commons Messaging Mail proporciona una capa sencilla sobre JavaMail/Jakarta Mail para OSGi para enviar correos por medio de SMTPS. Para reducir el riesgo de ataques de tipo "man in the middle" deben realizarse comprobaciones adicionales de la identidad del servidor cuando accede a los servidores de correo. Por razones de compatibilidad, estas comprobaciones adicionales están deshabilitadas por defecto en JavaMail/Jakarta Mail. El SimpleMailService de Apache Sling Commons Messaging Mail versión 1.0 carece de una opción para habilitar estas comprobaciones para la sesión de correo compartido. Sin embargo, un usuario podría habilitar estas comprobaciones accediendo a la sesión por medio del mensaje creado por SimpleMessageBuilder y estableciendo la propiedad mail.smtps.ssl.checkserveridentity a true. Apache Sling Commons Messaging Mail versión 2.0 añade soporte para habilitar las comprobaciones de identidad del servidor y estas comprobaciones están habilitadas por defecto. - https://javaee.github.io/javamail/docs/SSLNOTES.txt - https://javaee.github.io/javamail/docs/api/com/sun/mail/smtp/package-summary.html - https://github.com/eclipse-ee4j/mail/issues/429

*Credits: The issue was reported by Michael Lescisin.
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-12-04 CVE Reserved
  • 2021-12-14 CVE Published
  • 2023-12-11 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-295: Improper Certificate Validation
CAPEC
References (1)
URL Tag Source
URL Date SRC
URL Date SRC
URL Date SRC
https://lists.apache.org/thread/l8p9h2bqvkj6rhv4w8kzctb817415b7f 2023-11-07
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Apache
Search vendor "Apache"
 Sling Commons Messaging Mail
Search vendor "Apache" for product "Sling Commons Messaging Mail"
 1.0.0
Search vendor "Apache" for product "Sling Commons Messaging Mail" and version "1.0.0"
-
Affected