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Directory Traversal in serve

Moderate severity GitHub Reviewed Published Jul 27, 2018 to the GitHub Advisory Database • Updated Apr 21, 2023

Package

npm serve (npm)

Affected versions

<= 6.4.8

Patched versions

6.4.9

Description

Affected versions of serve do not properly handle %2e (.) and %2f (/) characters, and allow the, characters to be used in paths. This can be used to traverse the directory tree and list content of any directory the user running the process has access to.

Mitigating factors:
This vulnerability only allows listing of directory contents and does not allow reading of arbitrary files.

Recommendation

Update to version 6.4.9 later.

References

Published to the GitHub Advisory Database Jul 27, 2018
Reviewed Jun 16, 2020
Last updated Apr 21, 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
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
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:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS score

0.087%
(37th percentile)

Weaknesses

CVE ID

CVE-2018-3712

GHSA ID

GHSA-q2qh-cgc2-qhr3

Source code

Credits

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