Academic research on vulnerable c++ code snippet

[JafarAkhondali]

Dear Sourcey,
We are a group of Academic researchers. We are analyzing vulnerable C++ code snippets migrated from StackOverflow to GitHub. Our research will be published in Academic publications and will not be used in any Industrial application.
We noted a vulnerable code snippet in your repository that was most likely copied from Stack Overflow. The vulnerability exists in this source code file of your repository.

Please verify our report here with regards to the above vulnerability to assist you.
Link to report with four questions for you related to the vulnerability (should not take more than 5 minutes to answer).

Here is a summary of the vulnerable code snippet:

Description:

If current_index or current_index + sizeof(T) get larger than size of vec, information leakage can occur.

static T get_from_vector(const std::vector<uint8_t>& vec, const size_t current_index){

example:

int main(){
std::vector<uint8_t> vec {0x01, 0x05};
auto byte1 = get_from_vector<uint8_t>(vec, 10);
auto byte2 = get_from_vector<uint16_t>(vec, 20);
auto byte4 = get_from_vector<uint32_t>(vec, 50);
auto byte8 = get_from_vector<uint64_t>(vec, 32);
printf("%x - %x -%x -%x",byte1,byte2,byte4,byte8);
}

output it's being like this:

0 - 0 -0 -382d3531

Mitigation:

Validate size of current_index + sizeof(T) to always be in the boundary of vec.

---

Please verify our report here with regards to the above vulnerability to assist you.
Link to report with four questions for you related to the vulnerability (should not take more than 5 minutes to answer).

Sincerely yours,
Morteza Verdi, Shiraz university, E-mail: [email protected]
Jafar Akhondali, Shiraz university, E-mail: [email protected]
Ashkan Sami, Shiraz university, E-mail: [email protected]
Foutse Khomh, Polytechnique Montreal, E-mail: [email protected], website: http://www.khomh.net/
Gias Uddin, Polytechnique Montreal, E-mail: [email protected], website: https://giasuddin.github.io
Alireza Karami motlagh, Shahid Chamran University, E-mail: [email protected]