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SecurityAlert : 3457 CVE : CVE-2007-6404 CVE : CVE-2007-6405 SecurityRisk : Medium  (About) Remote Exploit : Yes Local Exploit : No Exploit Available : Yes Credit : Luigi Auriemma Published : 17.12.2007
Advisory Content : ####################################################################### Luigi Auriemma Application: Simple HTTPD http://shttpd.sourceforge.net Versions: <= 1.38 Platforms: Windows, *nix, QNX, RTEMS only Windows seems vulnerable Bugs: A] directory traversal B] scripts and CGI viewing/downloading (%20 char found by Shay priel in Jun 2007) Exploitation: remote Date: 07 Dec 2007 Author: Luigi Auriemma e-mail: aluigi (at) autistici (dot) org [email concealed] web: aluigi.org ####################################################################### 1) Introduction 2) Bugs 3) The Code 4) Fix ####################################################################### =============== 1) Introduction =============== Simple HTTPD (shttpd) is an open source web server created for embedded systems. ####################################################################### ======= 2) Bugs ======= ---------------------- A] directory traversal ---------------------- Using the ".." pattern is possible to download any file in the disk on which is located the web root directory. -------------------------------------- B] scripts and CGI viewing/downloading -------------------------------------- Any script or CGI in the server can be viewed/downloaded instead of being executed simply appending the chars '+', '.', %20 (this one reported by Shay priel in the summer 2007), %2e and any other byte (in hex format too) major than 0x7f to the requested filename. Note that only Windows seems vulnerable to the above bugs. ####################################################################### =========== 3) The Code =========== A] http://SERVER/......boot.ini http://SERVER/..%2e%2e%5c..boot.ini B] http://SERVER/file.php+ http://SERVER/file.php. http://SERVER/file.php%80 http://SERVER/file.php%ff ####################################################################### ====== 4) Fix ====== I have posted the problems in the shttpd-general mailing-list but there is no reply yet: http://sourceforge.net/mailarchive/forum.php?forum_name=shttpd-general ####################################################################### --- Luigi Auriemma http://aluigi.org  Feedback : If you have additional information or notice any errors regarding this security advisory, please use contact form or email us at info()securityreason()com. |
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