golang-github-cli-safeexec-dev - 1.0.1-1 main

safeexec is a Go module that provides a safer alternative to exec.LookPath()
on Windows.
.
The following, relatively common approach to running external commands
has a subtle vulnerability on Windows:
.
import "os/exec"
.
func gitStatus() error {
// On Windows, this will result in .\git.exe or .\git.bat being executed
// if either were found in the current working directory.
cmd := exec.Command("git", "status") return cmd.Run()
}
.
Searching the current directory (surprising behavior) before searching
folders listed in the PATH environment variable (expected behavior)
seems to be intended in Go and unlikely to be changed:
https://github.com/golang/go/issues/38736
.
Since Go does not provide a version of exec.LookPath() that only searches
PATH and does not search the current working directory, this module provides
a LookPath function that works consistently across platforms.
.
Example use:
.
import (
"os/exec" "github.com/cli/safeexec"
)
.
func gitStatus() error {
gitBin, err := safeexec.LookPath("git")
if err != nil {
return err
}
cmd := exec.Command(gitBin, "status")
return cmd.Run()
}