WinSCP scp and sftp command execution

winscp-scpsftp-command-execution (36591) The risk level is classified as MediumMedium Risk

Description:

WinSCP could allow a remote attacker to execute arbitrary commands on the system. By persuading a victim to visit a specially-crafted Web site containing scp or sftp commands in an iframe, an attacker could exploit this vulnerability to upload arbitrary files to the system or download arbitrary files from the system.

*CVSS:

Base Score: 5.8
  Access Vector: Network
  Access Complexity: Medium
  Authentication: None
  Confidentiality Impact: Partial
  Integrity Impact: Partial
  Availability Impact: None
 
Temporal Score: 4.3
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Gain Access

Remedy:

Upgrade to the latest version of WinSCP (4.04 or later), available from the WinSCP Web site. See References.

References:

  • BugTraq Mailing List, Thu Sep 13 2007 - 06:22:32 CDT: WinSCP < 4.04 url protocol handler flaw.
  • WinSCP Web site: Freeware SFTP and SCP client for Windows.
  • BID-25655: WinSCP URL Protocol Handler Arbitrary File Access Vulnerability
  • CVE-2007-4909: Interpretation conflict in WinSCP before 4.0.4 allows remote attackers to perform arbitrary file transfers with a remote server via file-transfer commands in the final portion of a (1) scp, and possibly a (2) sftp or (3) ftp, URL, as demonstrated by a URL specifying login to the remote server with a username of scp, which is interpreted as an HTTP scheme name by the protocol handler in a web browser, but is interpreted as a username by WinSCP. NOTE: this is related to an incomplete fix for CVE-2006-3015.
  • SA26820: WinSCP Protocol Handler Command Line Switch Injection
  • SECTRACK ID: 1018697: WinSCP URL Protocol Handlers Let Remote Users Upload/Download Arbitrary Files

Platforms Affected:

  • WinSCP WinSCP prior to 4.04

Reported:

Sep 13, 2007

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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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