Impact
In the RPL-Classic routing protocol implementation in the Contiki-NG operating system, an incoming DODAG Information Option (DIO) control message can contain a prefix information option with a length parameter. The value of the length parameter is not validated, however, and it is possible to cause a buffer overflow when copying the prefix in the set_ip_from_prefix function.
This vulnerability affects anyone running a Contiki-NG version prior to 4.7 that can receive RPL DIO messages from external parties.
Patches
To obtain a patched version, users should upgrade to Contiki-NG 4.7 or later.
Workarounds
The problem has been patched in PR #1589, which inserts a validation check that discards DIOs with too large length values in the prefix info option.
For more information
If you have any questions or comments about this advisory:
Impact
In the RPL-Classic routing protocol implementation in the Contiki-NG operating system, an incoming DODAG Information Option (DIO) control message can contain a prefix information option with a length parameter. The value of the length parameter is not validated, however, and it is possible to cause a buffer overflow when copying the prefix in the set_ip_from_prefix function.
This vulnerability affects anyone running a Contiki-NG version prior to 4.7 that can receive RPL DIO messages from external parties.
Patches
To obtain a patched version, users should upgrade to Contiki-NG 4.7 or later.
Workarounds
The problem has been patched in PR #1589, which inserts a validation check that discards DIOs with too large length values in the prefix info option.
For more information
If you have any questions or comments about this advisory: