CVE-2023-37281 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Reference

https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-2v4c-9p48-g9pr https://github.com/contiki-ng/contiki-ng/pull/2509

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

NONE

Base Severity

5.3