Impact
An out-of-bounds write can occur in the BLE L2CAP module of the Contiki-NG operating system. The network stack of Contiki-NG uses a global buffer (packetbuf) for processing of packets, with the size of PACKETBUF_SIZE. In particular, when using the BLE L2CAP module with the default configuration, the PACKETBUF_SIZE value becomes larger then the actual size of the packetbuf. When large packets are processed by the L2CAP module, a buffer overflow can therefore occur when copying the packet data to the packetbuf.
Patches
The vulnerability has been patched in the "develop" branch of Contiki-NG, and will be included in release 4.9.
Workarounds
The problem can be fixed by applying the patch in Contiki-NG pull request #2398.
For more information
If you have any questions or comments about this advisory:
Open an issue in https://github.com/contiki-ng/contiki-ng
Email us at security@contiki-ng.org
Impact
An out-of-bounds write can occur in the BLE L2CAP module of the Contiki-NG operating system. The network stack of Contiki-NG uses a global buffer (packetbuf) for processing of packets, with the size of PACKETBUF_SIZE. In particular, when using the BLE L2CAP module with the default configuration, the PACKETBUF_SIZE value becomes larger then the actual size of the packetbuf. When large packets are processed by the L2CAP module, a buffer overflow can therefore occur when copying the packet data to the packetbuf.
Patches
The vulnerability has been patched in the "develop" branch of Contiki-NG, and will be included in release 4.9.
Workarounds
The problem can be fixed by applying the patch in Contiki-NG pull request #2398.
For more information
If you have any questions or comments about this advisory:
Open an issue in https://github.com/contiki-ng/contiki-ng
Email us at security@contiki-ng.org