ghsa-2gqw-q9r9-7f79
Vulnerability from github
Overview
Prototype pollution vulnerability in 'changeset' versions 0.0.1 through 0.2.5 allows attackers to cause a denial of service and may lead to remote code execution.
Details
The npm module 'changeset' can be abused by Prototype Pollution vulnerability since the function 'apply()' does not check for the type of object before assigning value to the property. Due to this flaw an attacker could create a non-existent property or able to manipulate the property which leads to Denial of Service or potentially Remote code execution.
PoC Details
The 'apply()' function accepts 'changes, target, modify' as argument. Due to the absence of validation on the values passed into the 'changes' argument, an attacker can supply a malicious value by adjusting the value to include the 'proto' property. Since there is no validation before assigning the property to check whether the assigned argument is the Object's own property or not, the property 'polluted' will be directly be assigned to the new object thereby polluting the Object prototype. Using the example below, if there is a check to validate 'polluted' the valued later in the code, it would be substituted as "Yes! Its Polluted" as it had been polluted.
PoC Code
js
var changeset = require("changeset") const patch = [{
type: 'put',
key: ["__proto__", "polluted"],
value: "Yes! Its Polluted"
}];
console.log("Before : " + {}.polluted);
changeset.apply(patch, {}, true);
console.log("After : " + {}.polluted);
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "changeset"
},
"ranges": [
{
"events": [
{
"introduced": "0.0.1"
},
{
"fixed": "0.2.5"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2021-25915"
],
"database_specific": {
"cwe_ids": [
"CWE-1321"
],
"github_reviewed": true,
"github_reviewed_at": "2023-10-19T18:27:41Z",
"nvd_published_at": "2021-03-09T15:15:00Z",
"severity": "CRITICAL"
},
"details": "### Overview\nPrototype pollution vulnerability in \u0027changeset\u0027 versions 0.0.1 through 0.2.5 allows attackers to cause a denial of service and may lead to remote code execution.\n\n### Details\nThe npm module \u0027changeset\u0027 can be abused by Prototype Pollution vulnerability since the function \u0027apply()\u0027 does not check for the type of object before assigning value to the property. Due to this flaw an attacker could create a non-existent property or able to manipulate the property which leads to Denial of Service or potentially Remote code execution.\n\n### PoC Details\nThe \u0027apply()\u0027 function accepts \u0027changes, target, modify\u0027 as argument. Due to the absence of validation on the values passed into the \u0027changes\u0027 argument, an attacker can supply a malicious value by adjusting the value to include the \u0027__proto__\u0027 property. Since there is no validation before assigning the property to check whether the assigned argument is the Object\u0027s own property or not, the property \u0027polluted\u0027 will be directly be assigned to the new object thereby polluting the Object prototype. Using the example below, if there is a check to validate \u0027polluted\u0027 the valued later in the code, it would be substituted as \"Yes! Its Polluted\" as it had been polluted.\n\n### PoC Code\n\n```js\nvar changeset = require(\"changeset\") const patch = [{\n type: \u0027put\u0027,\n key: [\"__proto__\", \"polluted\"],\n value: \"Yes! Its Polluted\"\n}];\nconsole.log(\"Before : \" + {}.polluted);\nchangeset.apply(patch, {}, true);\nconsole.log(\"After : \" + {}.polluted);\n```",
"id": "GHSA-2gqw-q9r9-7f79",
"modified": "2023-10-19T18:27:41Z",
"published": "2022-05-24T17:44:00Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-25915"
},
{
"type": "WEB",
"url": "https://github.com/eugeneware/changeset/commit/9e588844edbb9993b32e7366cc799262b4447f99"
},
{
"type": "PACKAGE",
"url": "https://github.com/eugeneware/changeset"
},
{
"type": "WEB",
"url": "https://web.archive.org/web/20210323102946/https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25915"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "Changeset vulnerable to prototype pollution"
}
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.