CVE-2023-33975
CriticalCVSS 9.8Exploitation Probability (EPSS)
Elevated risk71th percentile - higher than 71% of all known CVEs
Summary
RIOT-OS, an operating system for IoT devices, contains a network stack capable of processing 6LoWPAN frames. In version 2023.01 and prior, an attacker can send a crafted frame to the device resulting in an out of bounds write in the packet buffer.
Risk Assessment
The overflow can corrupt other packets and allocator metadata, leading to denial of service and the potential for arbitrary code execution by the attacker.
Recommendation
It is recommended to update the system to a version where the issue is fixed or disable support for fragmented IP datagrams as a temporary workaround.
Original NVD description (English source)
RIOT-OS, an operating system for Internet of Things (IoT) devices, contains a network stack with the ability to process 6LoWPAN frames. In version 2023.01 and prior, an attacker can send a crafted frame to the device resulting in an out of bounds write in the packet buffer. The overflow can be used to corrupt other packets and the allocator metadata. Corrupting a pointer will easily lead to denial of service. While carefully manipulating the allocator metadata gives an attacker the possibility to write data to arbitrary locations and thus execute arbitrary code. This issue is fixed in pull request 19680. As a workaround, disable support for fragmented IP datagrams.