PT-2019-4634 · Handlebars · Handlebars

Published 2019-12-20 · Updated 2022-06-03 · CVE-2019-19919

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions handlebars versions prior to 4.3.0 handlebars versions prior to 3.0.8

Description The issue allows an attacker to execute arbitrary code through crafted payloads by altering an Object's proto and defineGetter properties. This is due to the lack of measures to neutralize special elements in the Handlebars templating engine. Templates may modify these properties, potentially leading to Remote Code Execution.

Recommendations For handlebars versions prior to 3.0.8, upgrade to version 3.0.8 or later. For handlebars versions prior to 4.3.0, upgrade to version 4.3.0 or later.

Exploit

Fix

RCE

Special Elements Injection

Prototype Pollution

Weakness Enumeration

CWE-74

CWE-1321

Related Identifiers

BDU:2020-00795

CVE-2019-19919

GHSA-W457-6Q6X-CGP9

Affected Products

Handlebars

References · 23

• 🔥 https://github.com/rubysec/ruby-advisory-db/blob/master/gems/bootstrap-wysihtml5-rails/CVE-2019-19919.yml · Exploit
• https://tenable.com/security/tns-2021-14 · Patch
• https://security-tracker.debian.org/tracker/CVE-2019-19919 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-19919 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-19919 · Vendor Advisory
• https://bdu.fstec.ru/vul/2020-00795 · Security Note
• https://cve.org/CVERecord?id=CVE-2019-19919 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2019-19919 · Security Note
• https://osv.dev/vulnerability/GHSA-w457-6q6x-cgp9 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-19919 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-19919 · Vendor Advisory
• https://debian.org/News/2020/20200208.ru.html · Vendor Advisory
• https://github.com/handlebars-lang/handlebars.js/commit/90ad8d97ad2933852fb83fcc054699dc99e094db · Note
• https://github.com/wycats/handlebars.js · Note
• https://github.com/wycats/handlebars.js/issues/1558 · Note