Prototype Pollution in handlebars

2019-12-2521:00:00

RubySec

github.com

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

AI Score

7.7

Confidence

Low

EPSS

0.012

Percentile

85.2%

JSON

The bootstrap-wysihtml5-rails gem includes the vendored JavaScript library ‘handlebars.js’.
Versions 0.3.3.7-0.3.3.8 include handlebars 3.0.2, and versions 0.3.3.5-0.3.3.6 include handlebars 1.3.0.

Versions Affected: 0.3.3.5-0.3.3.8
Not affected: < 0.3.3.5
Fixed Versions: None

Versions of handlebars prior to 3.0.8 or 4.3.0 are vulnerable to Prototype Pollution leading to Remote Code Execution.
Templates may alter an Objects’ proto and defineGetter properties, which may allow an attacker to execute
arbitrary code through crafted payloads.