// For flags

CVE-2020-14936

 

Severity Score

9.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Buffer overflows were discovered in Contiki-NG 4.4 through 4.5, in the SNMP agent. Functions parsing the OIDs in SNMP requests lack sufficient allocated target-buffer capacity verification when writing parsed OID values. The function snmp_oid_decode_oid() may overwrite memory areas beyond the provided target buffer, when called from snmp_message_decode() upon an SNMP request reception. Because the content of the write operations is externally provided in the SNMP requests, it enables a remote overwrite of an IoT device's memory regions beyond the allocated buffer. This overflow may allow remote overwrite of stack and statically allocated variables memory regions by sending a crafted SNMP request.

Se detectaron desbordamientos del búfer en Contiki-NG versiones 4.4 hasta 4.5, en el agente SNMP. Las funciones que analizan los OID en las peticiones SNMP carecen de suficiente verificación de la capacidad del búfer de destino asignada al escribir valores de OID analizados. La función snmp_oid_decode_oid() puede sobrescribir áreas de memoria más allá del búfer de destino provisto, cuando se llama desde la función snmp_message_decode() al recibir una petición SNMP. Dado que el contenido de las operaciones de escritura es proporcionado externamente en las peticiones SNMP, permite una sobrescritura remota de las regiones de memoria de un dispositivo IoT más allá del búfer asignado. Este desbordamiento puede permitir la sobrescritura remota de la pila y las regiones de memoria variables asignadas estáticamente mediante el envío de una petición SNMP diseñada.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-06-21 CVE Reserved
  • 2020-08-18 CVE Published
  • 2023-05-04 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-787: Out-of-bounds Write
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Contiki-ng
Search vendor "Contiki-ng"
 Contiki-ng
Search vendor "Contiki-ng" for product "Contiki-ng"
 >= 4.4 <= 4.5
Search vendor "Contiki-ng" for product "Contiki-ng" and version " >= 4.4 <= 4.5"
-
Affected