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CoreFTP Directory Traversal

Moderate severity GitHub Reviewed Published May 14, 2022 to the GitHub Advisory Database • Updated Sep 28, 2023

Package

nuget CoreFtp (NuGet)

Affected versions

<= 2.0

Patched versions

None

Description

An issue was discovered in the SFTP Server component in Core FTP 2.0 Build 674. A directory traversal vulnerability exists using the SIZE command along with a \..\..\ substring, allowing an attacker to enumerate file existence based on the returned information.

References

Published by the National Vulnerability Database Mar 22, 2019
Published to the GitHub Advisory Database May 14, 2022
Reviewed Jul 19, 2023
Last updated Sep 28, 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
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
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:N/UI:N/S:U/C:L/I:N/A:N

EPSS score

4.283%
(93rd percentile)

Weaknesses

CVE ID

CVE-2019-9648

GHSA ID

GHSA-w393-h95m-f879

Source code

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