GHSA-xp9c-82x8-7f67 — high GitHub Advisory (CVE-2021-21297) in npm/@node-red/runtime

Description

Impact

Node-RED 1.2.7 and earlier contains a Prototype Pollution vulnerability in the admin API. A badly formed request can modify the prototype of the default JavaScript Object with the potential to affect the default behaviour of the Node-RED runtime.

Patches

The vulnerability is patched in the 1.2.8 release.

Workarounds

A workaround is to ensure only authorised users are able to access the editor url.

For more information

If you have any questions or comments about this advisory:
* Email us at [email protected]

Acknowledgements

Thanks to the Tencent Woodpecker Security Team for disclosing this vulnerability.

Basic information

Type: reviewed
Severity: high
Advisory on GitHub: Open advisory ↗
Repository advisory: Open repository advisory ↗
Source code: Browse source ↗
Published (advisory): 2021-02-26 16:31:05 UTC
Updated: 2023-02-01 05:05:09 UTC
GitHub reviewed: 2021-02-26 16:22:38 UTC
NVD published: 2021-02-26

Score	Percentile
0.23%	45.51%

CVSS Scores

Base score	Version	Severity	Vector
7.7	3.1	—	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:N) Service keeps running; no real outage angle.

Identifiers

Type	Value
GHSA	GHSA-xp9c-82x8-7f67 ↗
CVE	CVE-2021-21297 ↗

CWEs

CWE id	Name
CWE-915	Improperly Controlled Modification of Dynamically-Determined Object Attributes
CWE-1321	Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem	Package	Vulnerable range	First patched	Vulnerable functions
npm	@node-red/runtime	< 1.2.8	1.2.8	—

Prototype Pollution in Node-Red