// For flags

CVE-2022-36053

Out-of-bounds read in the uIP buffer module

Severity Score

8.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Contiki-NG is an open-source, cross-platform operating system for Next-Generation IoT devices. The low-power IPv6 network stack of Contiki-NG has a buffer module (os/net/ipv6/uipbuf.c) that processes IPv6 extension headers in incoming data packets. As part of this processing, the function uipbuf_get_next_header casts a pointer to a uip_ext_hdr structure into the packet buffer at different offsets where extension headers are expected to be found, and then reads from this structure. Because of a lack of bounds checking, the casting can be done so that the structure extends beyond the packet's end. Hence, with a carefully crafted packet, it is possible to cause the Contiki-NG system to read data outside the packet buffer. A patch that fixes the vulnerability is included in Contiki-NG 4.8.

Contiki-NG es un sistema operativo de código abierto y multiplataforma para dispositivos IoT de Próxima Generación. La pila de red IPv6 de bajo consumo de Contiki-NG presenta un módulo de búfer (os/net/ipv6/uipbuf.c) que procesa los encabezados de extensión IPv6 en los paquetes de datos entrantes. Como parte de este procesamiento, la función uipbuf_get_next_header lanza un puntero a una estructura uip_ext_hdr en el búfer del paquete en los diferentes desplazamientos en los que es esperado encontrar las cabeceras de extensión, y luego lee de esta estructura. Debido a una falta de comprobación de límites, el casting puede hacerse de manera que la estructura sea extendida más allá del final del paquete. Por lo tanto, con un paquete cuidadosamente diseñado, es posible causar que el sistema Contiki-NG lea datos fuera del buffer del paquete. En Contiki-NG versión 4.8 es incluido un parche que corrige la vulnerabilidad

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2022-07-15 CVE Reserved
  • 2022-09-01 CVE Published
  • 2024-03-24 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-125: Out-of-bounds Read
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"
 < 4.8
Search vendor "Contiki-ng" for product "Contiki-ng" and version " < 4.8"
-
Affected