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Cloudflare Wrangler directory traversal vulnerability

Moderate severity GitHub Reviewed Published Aug 3, 2023 in cloudflare/workers-sdk • Updated Nov 8, 2023

Package

npm wrangler (npm)

Affected versions

< 2.20.1

Patched versions

2.20.1

Description

Impact

The Wrangler command line tool (<=wrangler@3.1.0 or <=wrangler@2.20.1) was affected by a directory traversal vulnerability when running a local development server for Pages (wrangler pages dev command). This vulnerability enabled an attacker in the same network as the victim to connect to the local development server and access the victim's files present outside of the directory for the development server.

Patches

Wrangler2: Upgrade to v2.20.1 or higher.
Wrangler3: Upgrade to v3.1.1 or higher.

References

Workers SDK on Github
Wrangler docs
CVE-2023-3348

References

@mskowroncf mskowroncf published to cloudflare/workers-sdk Aug 3, 2023
Published by the National Vulnerability Database Aug 3, 2023
Published to the GitHub Advisory Database Aug 3, 2023
Reviewed Aug 3, 2023
Last updated Nov 8, 2023

Severity

Moderate

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
Adjacent
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

EPSS score

0.057%
(24th percentile)

Weaknesses

CVE ID

CVE-2023-3348

GHSA ID

GHSA-8c93-4hch-xgxp

Source code

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