CVE-2021-21353 Detail

Current Description

Pug is an npm package which is a high-performance template engine. In pug before version 3.0.1, if a remote attacker was able to control the `pretty` option of the pug compiler, e.g. if you spread a user provided object such as the query parameters of a request into the pug template inputs, it was possible for them to achieve remote code execution on the node.js backend. This is fixed in version 3.0.1. This advisory applies to multiple pug packages including "pug", "pug-code-gen". pug-code-gen has a backported fix at version 2.0.3. This advisory is not exploitable if there is no way for un-trusted input to be passed to pug as the `pretty` option, e.g. if you compile templates in advance before applying user input to them, you do not need to upgrade.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  9.0 CRITICAL
Vector:  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Nist CVSS score does not match with CNA score
CNA:  GitHub, Inc.
Base Score:  6.8 MEDIUM
Vector:  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: It is possible that the NVD CVSS may not match that of the CNA. The most common reason for this is that publicly available information does not provide sufficient detail or that information simply was not available at the time the CVSS vector string was assigned.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://github.com/pugjs/pug/commit/991e78f7c4220b2f8da042877c6f0ef5a4683be0 Patch  Third Party Advisory 
https://github.com/pugjs/pug/issues/3312 Exploit  Patch  Third Party Advisory 
https://github.com/pugjs/pug/pull/3314 Patch  Third Party Advisory 
https://github.com/pugjs/pug/releases/tag/pug%403.0.1 Release Notes  Third Party Advisory 
https://github.com/pugjs/pug/security/advisories/GHSA-p493-635q-r6gr Third Party Advisory 
https://www.npmjs.com/package/pug Product  Third Party Advisory 
https://www.npmjs.com/package/pug-code-gen Product  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') Provider acceptance level GitHub, Inc.  

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Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-21353
NVD Published Date:
03/02/2021
NVD Last Modified:
03/09/2021
Source:
GitHub, Inc.