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SecurityAlert : 3448 CVE : CVE-2007-6377 CVE : CVE-2007-6378 CVE : CVE-2007-6379 SecurityRisk : High  (About) Remote Exploit : Yes Local Exploit : No Exploit Available : Yes Credit : Luigi Auriemma Published : 16.12.2007
Advisory Content : ####################################################################### Luigi Auriemma Application: BadBlue http://www.badblue.com Versions: <= 2.72b Platforms: Windows Bugs: A] PassThru buffer-overflow B] upload directory traversal C] path disclosure Exploitation: remote Date: 10 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 =============== BadBlue is a commercial web server for sharing files easily. ####################################################################### ======= 2) Bugs ======= --------------------------- A] PassThru buffer-overflow --------------------------- When the PassThru command of ext.dll is invoked the BadBlue server takes the rest of the URI received by the client and copies it in a stack buffer of 4096 bytes using strcpy() and causing a buffer overflow. ----------------------------- B] upload directory traversal ----------------------------- Using the upload feature is possible for an attacker to upload a specific file outside the destination folder with also the possibility of overwriting existent files, included ext.ini which contains all the configuration of the server. ------------------ C] path disclosure ------------------ The full path of the webserver is visible when using the "?&browse=" parameter on an unexistent folder, useful in conjunction with bug B. ####################################################################### =========== 3) The Code =========== A] http://aluigi.org/poc/badbluebof.txt nc SERVER 80 -v -v < badbluebof.txt B] http://aluigi.org/testz/myhttpup.zip myhttpup http://SERVER/upload.dll file.txt ../../file.txt filedata0 C] http://SERVER/blah/?&browse= ####################################################################### ====== 4) Fix ====== No fix. I was waiting a second mail from the developers but nothing after almost two weeks. ####################################################################### --- 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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