CVE-2023-37281

Out-of-bounds read during IPHC address decompression

Severity Score

5.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

Contiki-NG is an operating system for internet-of-things devices. In versions 4.9 and prior, when processing the various IPv6 header fields during IPHC header decompression, Contiki-NG confirms the received packet buffer contains enough data as needed for that field. But no similar check is done before decompressing the IPv6 address. Therefore, up to 16 bytes can be read out of bounds on the line with the statement `memcpy(&ipaddr->u8[16 - postcount], iphc_ptr, postcount);`. The value of `postcount` depends on the address compression used in the received packet and can be controlled by the attacker. As a result, an attacker can inject a packet that causes an out-of-bound read. As of time of publication, a patched version is not available. As a workaround, one can apply the changes in Contiki-NG pull request #2509 to patch the system.

Contiki-NG es un sistema operativo para dispositivos de Internet de las cosas. En las versiones 4.9 y anteriores, al procesar los diversos campos del encabezado IPv6 durante la descompresión del encabezado IPHC, Contiki-NG confirma que el búfer del paquete recibido contiene suficientes datos necesarios para ese campo. Pero no se realiza ninguna verificación similar antes de descomprimir la dirección IPv6. Por lo tanto, se pueden leer hasta 16 bytes fuera de límites en la línea con la declaración `memcpy(&ipaddr->u8[16 - postcount], iphc_ptr, postcount);`. El valor de "postcount" depende de la compresión de dirección utilizada en el paquete recibido y puede ser controlado por el atacante. Como resultado, un atacante puede inyectar un paquete que provoque una lectura fuera de los límites. En el momento de la publicación, no hay una versión parcheada disponible. Como workaround, se pueden aplicar los cambios en la solicitud de extracción #2509 de Contiki-NG para parchear el sistema.

*Credits: N/A

CVSS Scores

NISTv3.1 5.3

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

None

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2023-06-29 CVE Reserved
2023-09-15 CVE Published
2024-09-25 CVE Updated
2024-10-17 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-125: Out-of-bounds Read

CAPEC

References (2)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://github.com/contiki-ng/contiki-ng/pull/2509	2023-09-19

URL	Date	SRC
https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-2v4c-9p48-g9pr	2023-09-19

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"				<= 4.9 Search vendor "Contiki-ng" for product "Contiki-ng" and version " <= 4.9"		-		Affected