CIA RESEARCH

Alerts

[CIA-1041-Alert] Microsoft Internet Information Server Denial of Service via Multiple GET requests.

Summary:

Under certain configurations a vulnerability in Microsoft Internet Information Server allows an attacker to crash the IIS server from remote by sending malformed requests.

Technical Details:

Internet Information Server is vulnerable to Denial-of-Service attacks when configured with folders with Execute Permission set to 'Scripts & Executables,' such as the /_vti_bin/ folder. Sending a specially formatted request to a directory with these permissions can cause server instability and a server crash. It is necessary to send at least four requests of this nature to crash the server. IIS 5.0 and IIS 6.0 are not vulnerable, only IIS 5.1 is affected.

Solution:

Contact Microsoft for a security fix.

CVE Reference:

GENERIC-MAP-NOMATCH

SecurityTracker Number(s):

1015376

Vendor URL:

Microsoft

About the Cenzic CIA Team:

Cenzic Intelligent Analysis (CIA) is Cenzic's research arm that focuses on continuous research for application vulnerabilities. Industry Research, Vulnerability assessment, penetration testing, and security testing - that's what Cenzic Intelligent Analysis Research is all about. Cenzic has dedicated experts whose sole job is to perform ongoing research to find not only common vulnerabilities but also vulnerabilities found in customer applications and make them available to our customers and to the community at large.

About Cenzic:

Cenzic provides Hailstorm® the revolutionary enterprise software suite for automated application security assessment and compliance that allows corporations and government organizations to dramatically improve the security of commercial and custom applications. Hailstorm enables security experts, QA professionals, and developers to work together to assess, analyze, and remediate applications for security vulnerabilities, and verify compliance with security policies. Benefits include reduced security risk and liability, lower development and testing costs, and faster time-to-market. Cenzic's customers are currently in the financial services and e-marketplaces sectors. For more information visit www.cenzic.com or call 1-866-4-CENZIC