HTTP: Microsoft IIS .DLL URL Remote Code Execution

This signature detects attempts to exploit a known vulnerability in Microsoft Internet Information Service (IIS). Attackers can send malformed URL requests that can trigger a denial-of-service condition or in worst cases would allow an attacker to execute remote code on the target system.

Extended Description

The URL parser in Microsoft Internet Information Services (IIS) 5.1 on Windows XP Professional SP2 allows remote attackers to execute arbitrary code via multiple requests to ".dll" followed by arguments such as "~0" through "~9", which causes ntdll.dll to produce a return value that is not correctly handled by IIS, as demonstrated using "/_vti_bin/.dll/*/~0". NOTE: the consequence was originally believed to be only a denial of service (application crash and reboot).

References

BugTraq: 15921

CVE: CVE-2005-4360

URL: http://ingehenriksen.blogspot.com/2005/12/microsoft-iis-remote-dos-dll-url.html http://www.microsoft.com/technet/security/Bulletin/ms07-041.mspx

Short Name

HTTP:IIS:DLL-URL-REQ

Severity

Major

Recommended

False

Recommended Action

Drop

HTTP: Microsoft IIS .DLL URL Remote Code Execution

Extended Description

References

Found a potential security threat?