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Arbitrary file read using percent-encoded relative paths in FileMiddleware

Moderate severity GitHub Reviewed Published Sep 30, 2020 in vapor/vapor • Updated Jun 19, 2023

Package

swift github.com/vapor/vapor (Swift)

Affected versions

>= 4.0.0-rc.2.5, < 4.29.4

Patched versions

4.29.4

Description

Impact

Attackers can access data at arbitrary filesystem paths on the same host as an application using FileMiddleware.

Patches

Version 4.29.4

Workarounds

Upgrade to 4.24.4 or later, or disable FileMiddleware.

References

For more information

If you have any questions or comments about this advisory:

References

@tanner0101 tanner0101 published to vapor/vapor Sep 30, 2020
Published by the National Vulnerability Database Oct 2, 2020
Published to the GitHub Advisory Database Jun 9, 2023
Reviewed Jun 9, 2023
Last updated Jun 19, 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:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS score

0.110%
(46th percentile)

Weaknesses

CVE ID

CVE-2020-15230

GHSA ID

GHSA-vcvg-xgr8-p5gq

Source code

Credits

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