vxTftpSrv Filename Buffer Overflow Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID: 1014912|
SecurityTracker URL: http://securitytracker.com/id/1014912
(Links to External Site)
Updated: Jun 8 2008|
Original Entry Date: Sep 15 2005
Denial of service via network, Execution of arbitrary code via network, User access via network|
Exploit Included: Yes |
A vulnerability was reported in vxTftpSrv. A remote user can execute arbitrary code on the target system.|
A remote user can connect to the TFTP service and send a long filename to the server to cause the TFTP service to crash or execute arbitrary code. A filename longer than 512 bytes can trigger the overflow.
Seth Fogie of Airscanner Mobile Security reported this vulnerability.
The original advisory is available at:
A remote user can cause the TFTP service to crash or execute arbitrary code.|
No solution was available at the time of this entry.|
Vendor URL: www.cam.com/vxtftpsrv.html (Links to External Site)
|Underlying OS: Windows (CE)|
Source Message Contents
Subject: Airscanner Mobile Security Advisory #05081203: vxTftpSrv 1.7.0 Remote|
Airscanner Mobile Security Advisory #05081203:
vxTftpSrv 1.7.0 Remote Code Execution Buffer Overflow Vulnerability
Tested on Windows Mobile Pocket PC 2003
Mobile device running Windows Mobile Pocket PC with vxTFTPSrv installed and running.
Airscanner Mobile Security
Mobile Antivirus Researchers Association
August 12 2005
High. Remote attacker can execute code.
vxTftpSrv is a simple, easy to use, Trivial File Transfer Protocol Server (TFTP) program which can be used to transfer files to and
from routers, switches, hubs and other network devices. vxTftpSrv is typically used by Network Administrators to configure such equipment.
Due to a improperly checked strcat call, it is possible to injection and execute code remotely via a buffer overflow.
When a long file name (>512 bytes) is sent to the tftp server, a strcat function overflows the stack. When the subroutine is complete,
the Program Counter is loaded from the stack, which results in a crash or remote code execution depending on the contents of the
injected file name.
Copyright (c) 2005 Airscanner Corp.
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