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Airscanner Mobile Security Advisory #05081203: vxTftpSrv 1.7.0 Remote Code Execution Buffer Overflow Vulnerability
From: contact () airscanner com
Date: 15 Sep 2005 02:06:26 -0000
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.
Permission is granted for the redistribution of this alert electronically. It may not be edited in any way without the
express written consent of Airscanner Corp. If you wish to reprint the whole or any part of this alert in any other
medium other than electronically, please contact Airscanner Corp. for permission.
Disclaimer: The information in the advisory is believed to be accurate at the time of publishing based on currently
available information. Use of the information constitutes acceptance for use on an AS IS condition. There are no
warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct,
indirect, or consequential loss or damage arising from use of, or reliance on, this information.
- Airscanner Mobile Security Advisory #05081203: vxTftpSrv 1.7.0 Remote Code Execution Buffer Overflow Vulnerability contact (Sep 15)