SID 1:21599

Rule Category

SERVER-IIS -- Snort has detected traffic exploiting vulnerabilities in Microsoft IIS Web Servers.

Alert Message

SERVER-IIS Microsoft Windows IIS 6 multiple executable extension access attempt

Rule Explanation

Microsoft Internet Information Services (IIS) 5.x and 6.x uses only the portion of a filename before a ; (semicolon) character to determine the file extension, which allows remote attackers to bypass intended extension restrictions of third-party upload applications via a filename with a (1) .asp, (2) .cer, or (3) .asa first extension, followed by a semicolon and a safe extension, as demonstrated by the use of asp.dll to handle a .asp;.jpg file. Impact: CVSS base score 6.0 CVSS impact score 6.4 CVSS exploitability score 6.8 confidentialityImpact PARTIAL integrityImpact PARTIAL availabilityImpact PARTIAL Details: Ease of Attack:

What To Look For

No information provided

Known Usage

No public information

False Positives

No known false positives

Contributors

Talos research team. This document was generated from data supplied by the national vulnerability database, a product of the national institute of standards and technology. For more information see [nvd].