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Category:   Application (File Transfer/Sharing)  >   FTP (Generic) Vendors:   Apple, NetBSD
BSD FTP Client HTTP Redirect Flaw Lets Remote Servers Execute Arbitrary Commands on the Target User's System
SecurityTracker Alert ID:  1031136
SecurityTracker URL:  http://securitytracker.com/id/1031136
CVE Reference:   CVE-2014-8517   (Links to External Site)
Updated:  Nov 5 2014
Original Entry Date:  Oct 30 2014
Impact:   Execution of arbitrary code via network, User access via network
Vendor Confirmed:  Yes  Exploit Included:  Yes  

Description:   A vulnerability was reported in some BSD-based FTP clients. A remote user can cause arbitrary commands to be executed on the target user's system.

A remote FTP server can return a specially crafted HTTP redirect to a connected client to cause the target client to execute arbitrary commands on the target system.

The vulnerability can be triggered in response to an FTP command for an HTTP resource when '-o' (output file) is not specified.

NetBSD tnftp(1) is affected. In NetBSD, the vulnerability resides in 'src/usr.bin/ftp/fetch.c'.

Apple OS X is affected.

FreeBSD is affected.

OpenBSD is not affected.

Other BSD-based systems may be affected.

Jared Mcneill reported this vulnerability.

Impact:   A remote user can cause arbitrary commands to be executed on the target connected user's system.
Solution:   NetBSD has issued a source code fix ('src/usr.bin/ftp/fetch.c').

No solution for Apple OS X was available at the time of this entry.

Vendor URL:  cxsecurity.com/issue/WLB-2014100174 (Links to External Site)
Cause:   Access control error
Underlying OS:  UNIX (FreeBSD), UNIX (NetBSD), UNIX (macOS/OS X)
Underlying OS Comments:  NetBSD 7.99.1; OSX 10.10; FreeBSD 8.4, 9.1, 9.2, 9.3, 10.0, 10.1; possibly other BSD-based systems

Message History:   This archive entry has one or more follow-up message(s) listed below.
Nov 3 2014 (NetBSD Issues Fix) BSD FTP Client HTTP Redirect Flaw Lets Remote Servers Execute Arbitrary Commands on the Target User's System
NetBSD has issued a fix for NetBSD 5.1, 5.2, 6.0, and 6.1.
Nov 5 2014 (FreeBSD Issues Fix) BSD FTP Client HTTP Redirect Flaw Lets Remote Servers Execute Arbitrary Commands on the Target User's System
FreeBSD has issued a fix for FreeBSD 8.4, 9.1, 9.2, 9.3, 10.0, and 10.1.



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