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Path Traversal in Yarn

High severity GitHub Reviewed Published Feb 9, 2022 to the GitHub Advisory Database • Updated Feb 1, 2023

Package

npm yarn (npm)

Affected versions

<= 1.21.1

Patched versions

1.22.0

Description

Arbitrary filesystem write vulnerability in Yarn 1.21.1 and earlier allows attackers to write to any path on the filesystem and potentially lead to arbitrary code execution by forcing the user to install a malicious package.

References

Published by the National Vulnerability Database Feb 24, 2020
Reviewed Apr 8, 2021
Published to the GitHub Advisory Database Feb 9, 2022
Last updated Feb 1, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS score

0.563%
(78th percentile)

Weaknesses

CVE ID

CVE-2020-8131

GHSA ID

GHSA-8mfc-v7wv-p62g

Source code

No known source code
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