Hello Malayke 👋
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Happy hacking!

Are you aware of the existing query go/ql/src/Security/CWE-190/AllocationSizeOverflow.ql? This seems very closely related. Can you comment on whether they overlap?

I carefully read the code of AllocationSizeOverflow. If I understand correctly, AllocationSizeOverflow restricts the input of the source to the Marshal function, and the query focuses on whether there will be an overflow.

According to my testing, when the make slice is very large and exceeds the maximum value, it will trigger a panic error, but the program will continue to run normally and not cause denial of service. If it does not exceed the maximum value, the program will run normally but consume a large amount of memory. In this case, the program will exhaust the memory resources, leading to denial of service.

The query I wrote specifically checks whether the size of the make slice is directly defined by an untrusted source. From the results of the two queries, it seems that AllocationSizeOverflow cannot detect the vulnerabilities of the two CVEs I mentioned.

@Malayke Do you intend to address the review comments so this can be merged and your bounty submission can be completed?

Hi @owen-mc, I have addressed all of your comments. Sorry for the late reply. I have been very busy these days.

QHelp previews:

package main

import (
	"encoding/json"
	"fmt"
	"net/http"
	"strconv"
)

func OutOfMemoryBad(w http.ResponseWriter, r *http.Request) {
	query := r.URL.Query()

	queryStr := query.Get("n")
	collectionSize, err := strconv.Atoi(queryStr)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	result := make([]string, collectionSize)
	for i := 0; i < collectionSize; i++ {
		result[i] = fmt.Sprintf("Item %d", i+1)
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(result)
}

package main

import (
	"encoding/json"
	"fmt"
	"net/http"
	"strconv"
)

func OutOfMemoryGood(w http.ResponseWriter, r *http.Request) {
	query := r.URL.Query()
	MaxValue := 6
	queryStr := query.Get("n")
	collectionSize, err := strconv.Atoi(queryStr)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	if collectionSize < 0 || collectionSize > MaxValue {
		http.Error(w, "Bad request", http.StatusBadRequest)
		return
	}
	result := make([]string, collectionSize)
	for i := 0; i < collectionSize; i++ {
		result[i] = fmt.Sprintf("Item %d", i+1)
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(result)
}

hi @owen-mc I'm committed your suggestion.

Thank you very much for your help as well.

Note that this query is being promoted in this PR.