// For flags

CVE-2021-40824

 

Severity Score

5.9
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

A logic error in the room key sharing functionality of Element Android before 1.2.2 and matrix-android-sdk2 (aka Matrix SDK for Android) before 1.2.2 allows a malicious Matrix homeserver present in an encrypted room to steal room encryption keys (via crafted Matrix protocol messages) that were originally sent by affected Matrix clients participating in that room. This allows the attacker to decrypt end-to-end encrypted messages sent by affected clients.

Un error lógico en la funcionalidad de compartición de claves de sala de Element Android antes de la versión 1.2.2 y matrix-android-sdk2 (también conocido como Matrix SDK para Android) antes de la versión 1.2.2 permite a un servidor doméstico de Matrix malicioso presente en una sala cifrada robar las claves de cifrado de la sala (a través de mensajes de protocolo de Matrix falsificados) que fueron enviados originalmente por los clientes de Matrix afectados que participan en esa sala. Esto permite al atacante descifrar los mensajes cifrados de extremo a extremo enviados por los clientes afectados

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-09-09 CVE Reserved
  • 2021-09-13 CVE Published
  • 2024-05-29 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-290: Authentication Bypass by Spoofing
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Matrix
Search vendor "Matrix"
 Element
Search vendor "Matrix" for product "Element"
 < 1.2.2
Search vendor "Matrix" for product "Element" and version " < 1.2.2"
android
Affected
Matrix
Search vendor "Matrix"
 Matrix-android-sdk2
Search vendor "Matrix" for product "Matrix-android-sdk2"
 < 1.2.2
Search vendor "Matrix" for product "Matrix-android-sdk2" and version " < 1.2.2"
android
Affected