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GitHub_MCVE-2021-21353

HistoryMar 03, 2021 - 2:15 a.m.

CVE-2021-21353

2021-03-0302:15:13

CWE-74

GitHub_M

web.nvd.nist.gov

pug

npm package

template engine

remote code execution

cve-2021-21353

security advisory

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

9.2

Confidence

High

EPSS

0.041

Percentile

92.2%

JSON

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.

Affected configurations

Nvd

Vulners

Node

pugjspugRange<3.0.1node.js

pugjspug-code-genRange<2.0.3node.js

pugjspug-code-genRange3.0.0–3.0.2node.js

VendorProductVersionCPE
pugjspug*cpe:2.3:a:pugjs:pug:*:*:*:*:*:node.js:*:*
pugjspug-code-gen*cpe:2.3:a:pugjs:pug-code-gen:*:*:*:*:*:node.js:*:*

Vendor	Product	Version	CPE
pugjs	pug	*	cpe:2.3:a:pugjs:pug::::::node.js::*
pugjs	pug-code-gen	*	cpe:2.3:a:pugjs:pug-code-gen::::::node.js::*

CNA Affected

[
  {
    "product": "pug",
    "vendor": "pugjs",
    "versions": [
      {
        "status": "affected",
        "version": "< 3.0.1"
      }
    ]
  }
]

References

github.com/pugjs/pug/commit/991e78f7c4220b2f8da042877c6f0ef5a4683be0

github.com/pugjs/pug/issues/3312

github.com/pugjs/pug/pull/3314

github.com/pugjs/pug/releases/tag/pug%403.0.1

github.com/pugjs/pug/security/advisories/GHSA-p493-635q-r6gr

www.npmjs.com/package/pug

www.npmjs.com/package/pug-code-gen

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

9.2

Confidence

High

EPSS

0.041

Percentile

92.2%

JSON

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