// For flags

CVE-2021-29433

Denial of service (via resource exhaustion) due to improper input validation

Severity Score

4.3
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Sydent is a reference Matrix identity server. In Sydent versions 2.2.0 and prior, sissing input validation of some parameters on the endpoints used to confirm third-party identifiers could cause excessive use of disk space and memory leading to resource exhaustion. A patch for the vulnerability is in version 2.3.0. No workarounds are known to exist.

Sydent es un servidor de identidad de Matrix de referencia. En las versiones 2.2.0 y anteriores de Sydent, la falta de validación de la entrada de algunos parámetros en los puntos finales utilizados para confirmar los identificadores de terceros podría causar un uso excesivo de espacio en disco y memoria, lo que llevaría al agotamiento de los recursos. La versión 2.3.0 contiene un parche para esta vulnerabilidad. No se conoce la existencia de soluciones

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Attack Vector
Network
Attack Complexity
Low
Authentication
Single
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-03-30 CVE Reserved
  • 2021-04-15 CVE Published
  • 2024-08-03 CVE Updated
  • 2024-09-02 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-20: Improper Input Validation
  • CWE-400: Uncontrolled Resource Consumption
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"
Sydent
Search vendor "Matrix" for product "Sydent"
< 2.3.0
Search vendor "Matrix" for product "Sydent" and version " < 2.3.0"
-
Affected