Core FTP FTP-client LIST command directory traversal

coreftp-list-directory-traversal (42605) The risk level is classified as MediumMedium Risk


Core FTP FTP-client could allow a remote attacker to traverse directories on the system. By persuading a victim to download a directory containing a file with "dot dot" sequences using forward-slash or backslash characters (../ or ..\) in the filename via the LIST command, an attacker could traverse directories and write arbitrary files to the system.


Base Score: 4.3
  Access Vector: Network
  Access Complexity: Medium
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: Partial
  Availability Impact: None
Temporal Score: 3.7
  Exploitability: High
  Remediation Level: Official-Fix
  Report Confidence: Confirmed


Gain Access


Upgrade to the latest version of Core FTP FTP-client (2.1 Build 1568 or later), available from the Core FTP Web site. See References.


  • Core FTP Web site: Free FTP client software for Windows.
  • Vulnerability Research Advisory 2008-05-23: Core FTP FTP-Client Directory Traversal Vulnerability.
  • BID-29362: Core FTP 'LIST' Command Directory Traversal Vulnerability
  • CVE-2008-2519: Directory traversal vulnerability in Core FTP client 2.1 Build 1565 allows remote FTP servers to create or overwrite arbitrary files via .. (dot dot) sequences in responses to LIST commands, a related issue to CVE-2002-1345. NOTE: this can be leveraged for code execution by writing to a Startup folder.
  • SA30389: Core FTP Directory Download Directory Traversal Vulnerability

Platforms Affected:

  • Core FTP Core FTP 2.1 Build 1565 Pro
  • Core FTP Core FTP 2.1 Build 1565 LE


May 23, 2008

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