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Security Advisories: GSA_kwCzR0hTQS12cTMzLTI2cHItcjRoNs4AAnA7
flattenizer vulnerable to prototype pollution
Overview
Prototype pollution vulnerability in ‘flattenizer’ versions 0.0.5 through 1.0.5 allows an attacker to cause a denial of service and may lead to remote code execution.
Details
The NPM module 'flattenizer' can be abused by Prototype Pollution vulnerability since the function 'unflatten()' did 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
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 thereby polluting the Object prototype. Later in the code, if there is a check to validate polluted
the valued would be substituted as "true" as it had been polluted.
var flattenizer = require("flattenizer")
flattenizer.unflatten({'__proto__.polluted': true});
console.log(polluted);
Permalink: https://github.com/advisories/GHSA-vq33-26pr-r4h6JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS12cTMzLTI2cHItcjRoNs4AAnA7
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Critical
Classification: General
Published: over 2 years ago
Updated: 5 months ago
CVSS Score: 9.8
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Identifiers: GHSA-vq33-26pr-r4h6, CVE-2020-28279
References:
- https://nvd.nist.gov/vuln/detail/CVE-2020-28279
- https://github.com/sahellebusch/flattenizer/pull/13
- https://github.com/sahellebusch/flattenizer/commit/3c6a6353df7c8879e931973b81a49a47f6c2b399
- https://web.archive.org/web/20210104205035/https://www.whitesourcesoftware.com/vulnerability-database/CVE-2020-28279
- https://github.com/advisories/GHSA-vq33-26pr-r4h6
Blast Radius: 11.2
Affected Packages
npm:flattenizer
Dependent packages: 4Dependent repositories: 14
Downloads: 4,289 last month
Affected Version Ranges: >= 0.0.5, <= 1.0.5
Fixed in: 1.1.1
All affected versions: 0.0.5, 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5
All unaffected versions: 0.0.1, 0.0.2, 1.1.0, 1.1.1, 1.1.2, 1.1.3