Impact
The 6LoWPAN implementation in Contiki-NG may cast a UDP header structure at a certain offset in a packet buffer. The code does not check whether the packet buffer is large enough to fit a full UDP header structure from the offset where the casting is made. Hence, it is possible to cause an out-of-bounds read beyond the packet buffer.
The problem affects anyone running devices with Contiki-NG versions previous to 4.8, and which may receive 6LoWPAN packets from external parties.
Patches
The problem has been patched in Contiki-NG version 4.8.
Workarounds
To fix the issue without upgrading, users can apply the patch in the GitHub pull request #1646.
For more information
If you have any questions or comments about this advisory:
Impact
The 6LoWPAN implementation in Contiki-NG may cast a UDP header structure at a certain offset in a packet buffer. The code does not check whether the packet buffer is large enough to fit a full UDP header structure from the offset where the casting is made. Hence, it is possible to cause an out-of-bounds read beyond the packet buffer.
The problem affects anyone running devices with Contiki-NG versions previous to 4.8, and which may receive 6LoWPAN packets from external parties.
Patches
The problem has been patched in Contiki-NG version 4.8.
Workarounds
To fix the issue without upgrading, users can apply the patch in the GitHub pull request #1646.
For more information
If you have any questions or comments about this advisory: