Vulnerabilities in pkg:nuget/CoreFtp

PACKAGE
Advisory Identifier: GHSA-w393-h95m-f879
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Advisory Summary

CVE-2019-9648 is a MODERATE (CVSS 5.3) path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting CoreFtp libraries in the NuGet ecosystem. The issue involves coreftp directory traversal. Remediation is available in the latest vendor maintenance releases.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:nuget/CoreFtp

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:nuget/CoreFtp. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-w393-h95m-f879 CVE-2019-9648 MODERATE CoreFTP Directory Traversal

CVE-2019-9648 at a Glance

CVE Identifier CVE-2019-9648
GHSA Identifier GHSA-w393-h95m-f879
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product CoreFtp
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 5.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2019-9648

To remediate this vulnerability, upgrade all affected CoreFtp dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

CoreFtp fixed: Latest secure release 
Upgrade CoreFtp to Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for CoreFtp

How to Check if You Are Affected

To determine whether your application is affected by CVE-2019-9648, inspect your project dependencies for CoreFtp:

inspect dependencies for CoreFtp

Analyze the terminal output to locate any version of CoreFtp in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where 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. In CoreFtp, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2019-9648 Affected CoreFtp Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
CoreFtp
nuget/CoreFtp
NuGet
≤ 2.0

References

NVD — CVE-2019-9648 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-9648
CoreFtp Source Repository REPOSITORY
https://github.com/sparkeh9/CoreFTP
seclists.org/fulldisclosure/2019... WEB
https://seclists.org/fulldisclosure/2019/Mar/23
CoreFtp Security Information SECURITY
https://web.archive.org/web/20210125013812/https://www.securityfocus.com/bid/107446
www.exploit-db.com/exploits/46535 WEB
https://www.exploit-db.com/exploits/46535
CoreFtp Security Information SECURITY
http://packetstormsecurity.com/files/154204/CoreFTP-Server-SIZE-Directory-Traversal.html
seclists.org/fulldisclosure/2019... WEB
http://seclists.org/fulldisclosure/2019/Aug/21
CoreFtp Security Information SECURITY
http://www.coreftp.com/forums/viewtopic.php?f=15&t=4022509

Frequently Asked Questions

What is CVE-2019-9648?
CVE-2019-9648 is a security vulnerability in CoreFtp involving CoreFTP Directory Traversal under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which CoreFtp versions are affected?
Affected versions include releases prior to current release patches across affected packages: CoreFtp.
What version fixes CVE-2019-9648?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is CoreFtp affected?
Yes, CoreFtp is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2019-9648?
CVE-2019-9648 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2019-9648?
CVE-2019-9648 is classified under CWE-22: 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.).
How can I check NuGet dependencies for CVE-2019-9648?
Run the dependency tree command: 'inspect dependencies for CoreFtp'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-w393-h95m-f879",
  "modified" : "2023-09-28T20:30:19Z",
  "published" : "2022-05-14T00:52:11Z",
  "aliases" : [ "CVE-2019-9648" ],
  "summary" : "CoreFTP Directory Traversal",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "CoreFtp"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "2.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-9648"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/sparkeh9/CoreFTP"
  }, {
    "type" : "WEB",
    "url" : "https://seclists.org/fulldisclosure/2019/Mar/23"
  }, {
    "type" : "WEB",
    "url" : "https://web.archive.org/web/20210125013812/https://www.securityfocus.com/bid/107446"
  }, {
    "type" : "WEB",
    "url" : "https://www.exploit-db.com/exploits/46535"
  }, {
    "type" : "WEB",
    "url" : "http://packetstormsecurity.com/files/154204/CoreFTP-Server-SIZE-Directory-Traversal.html"
  }, {
    "type" : "WEB",
    "url" : "http://seclists.org/fulldisclosure/2019/Aug/21"
  }, {
    "type" : "WEB",
    "url" : "http://www.coreftp.com/forums/viewtopic.php?f=15&t=4022509"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-19T21:32:55Z",
    "nvd_published_at" : "2019-03-22T19:29:00Z"
  }
}