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Unrestricted Upload of File with Dangerous Type in unisharp/laravel-filemanager

Moderate severity GitHub Reviewed Published Jan 6, 2022 to the GitHub Advisory Database • Updated Apr 22, 2024

Package

composer unisharp/laravel-filemanager (Composer)

Affected versions

< 2.6.2

Patched versions

2.6.2

Description

This affects the package unisharp/laravel-filemanager prior to version 2.6.2. The upload() function does not sufficiently validate the file type when uploading.

An attacker may be able to reproduce the following steps:

  • Install a package with a web Laravel application.
  • Navigate to the Upload window
  • Upload an image file, then capture the request
  • Edit the request contents with a malicious file (webshell)
  • Enter the path of file uploaded on URL
  • Remote Code Execution

**Note: Prevention for bad extensions can be done by using a whitelist in the config file(lfm.php). Corresponding document can be found in the here.

References

Published by the National Vulnerability Database Dec 17, 2021
Reviewed Jan 4, 2022
Published to the GitHub Advisory Database Jan 6, 2022
Last updated Apr 22, 2024

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
High
Privileges required
Low
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
Low

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:L/UI:R/S:U/C:H/I:H/A:L

EPSS score

0.193%
(58th percentile)

Weaknesses

CVE ID

CVE-2021-23814

GHSA ID

GHSA-f8x6-m9f5-ffp8

Source code

Credits

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