Core FTP hostname buffer overflow

coreftp-hostname-bo (53488) The risk level is classified as HighHigh Risk

Description:

Core FTP is vulnerable to a stack-based buffer overflow, caused by improper bounds checking when resolving FTP server hostnames. By persuading a victim to import a malicious site backup file and connect to an entry containing an overly long hostname, a remote attacker could overflow a buffer and execute arbitrary code on the system.

*CVSS:

Base Score: 6.8
  Access Vector: Network
  Access Complexity: Medium
  Authentication: None
  Confidentiality Impact: Partial
  Integrity Impact: Partial
  Availability Impact: Partial
 
Temporal Score: 5.3
  Exploitability: Proof-of-Concept
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Gain Access

Remedy:

Upgrade to the latest version of Core FTP (2.1 build 1625 or later), available from the Core FTP Web site. See References.

References:

  • Core FTP Web site: Free FTP client software for Windows.
  • Packet Storm Web site: Core FTP LE v2.1 build 1612 Local Buffer Overflow PoC (Unicode).
  • CVE-2009-3484: Stack-based buffer overflow in Core FTP 2.1 build 1612 allows user-assisted remote attackers to execute arbitrary code via a long hostname in an FTP server entry in a site backup file. NOTE: some of these details are obtained from third party information.
  • OSVDB ID: 58385: Core FTP Server Hostname Handling Remote Overflow
  • SA36872: Core FTP Hostname Processing Buffer Overflow Vulnerability

Platforms Affected:

  • Core FTP Core FTP 2.1 Build 1612

Reported:

Sep 25, 2009

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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