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Arbitrary File Write in npm

High severity GitHub Reviewed Published Dec 12, 2019 in npm/cli • Updated Jan 9, 2023

Package

npm npm (npm)

Affected versions

< 6.13.3

Patched versions

6.13.3

Description

Versions of the npm CLI prior to 6.13.3 are vulnerable to an Arbitrary File Write. It fails to prevent access to folders outside of the intended node_modules folder through the bin field. A properly constructed entry in the package.json bin field would allow a package publisher to create files on a user's system when the package is installed. It is only possible to affect files that the user running npm install has access to and it is not possible to over write files that already exist on disk.

This behavior is still possible through install scripts. This vulnerability bypasses a user using the --ignore-scripts install option.

Recommendation

Upgrade to version 6.13.3 or later.

References

Last updated Jan 9, 2023
Reviewed Jun 17, 2020
Published to the GitHub Advisory Database Dec 13, 2019
@andreeleuterio andreeleuterio published to npm/cli Dec 12, 2019

Severity

High
7.7
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
High
Privileges required
Low
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N

CVE ID

CVE-2019-16775

GHSA ID

GHSA-m6cx-g6qm-p2cx

Source code

Credits

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