Maybe there is a Improper Input Validation

[Crispy-fried-chicken]

Hi,

The BN_div function implemented in bn_div.c is quite similiar to those in the openssl. Thus, it's very likely that this Improper Input Validation in CVE-2009-3245 also affects lede.
Here is the patch for CVE-2009-3245 for your reference if this issue needs to be fixed.
Would you can help to check if this bug is true? If it's true, I'd like to open a PR for that if necessary. Thank you for your effort and patience!