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.

Platforms Affected:

  • WinSCP, WinSCP prior to 4.04

Remedy:

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

Consequences:

Gain Access

References:

  • BugTraq Mailing List, Thu Sep 13 2007 - 06:22:32 CDT, WinSCP < 4.04 url protocol handler flaw at http://archives.neohapsis.com/archives/bugtraq/2007-09/0134.html.
  • WinSCP Web site, WinSCP :: Freeware SFTP and SCP client for WIndows at http://winscp.net/eng/index.php.
  • 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

Reported:

Sep 13, 2007

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