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Home arrow SecurityAlert Database

Arrow  Topic :

Microsoft IIS Remote Denial of Service (DoS) .DLL Url exploit


Arrow  SecurityAlert : 271
Arrow  CVE : CVE-2005-4360
Arrow  SecurityRisk : Medium  Security Risk Medium  (About)
Arrow  Remote Exploit : Yes
Arrow  Local Exploit : No
Arrow  Exploit Available : Yes
Arrow  Credit : Inge Henriksen
Arrow  Published : 18.12.2005

Arrow  Affected Software : Microsoft® Internet Information Server® V5.1



Arrow  Advisory Content :  

** Inge Henriksen Security Advisory - Full Disclosure Proof of Concept at
http://ingehenriksen.blogspot.com/ **

Advisory Name:
Microsoft IIS Remote Denial of Service (DoS) .DLL Url exploit

Release Date:
16. Desember 2005

Vulnerable:
Microsoft® Internet Information Server® V5.1

Not vulnerable:
Microsoft® Internet Information Server® V5.0
Microsoft® Internet Information Server® V6.0

Severity:
High

Discovered by:
Inge Henriksen (inge.henriksen (at) booleansoft (dot) com [email
concealed]) http://ingehenriksen.blogspot.com/

Vendor Status:
Notified 28. January 2005. No fix will be released until Microsoft®
Windows® XP Service Pack 3
(Rumored due late 2006).

Description:
I have found that by doing a malformed anonymous HTTP request one can
remotely crash the IIS service
process, inetinfo.exe, using just a simple tool like a web browser. The
vulnerablity is only present
in folders with Execute Permissions set to Scripts & Executables, examples
of vulnerable virtual
folders would be "<webroot>/_vti_bin" and the like.

Suggested solution:
Block all incoming URL's containing "~0", "~1", "~2", "~3", "~4", "~5",
"~6", "~7", "~8", or "~9"
(Ignore quotes).

Full Disclosure Proof of Concept at http://ingehenriksen.blogspot.com/




Arrow  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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