Microsoft IIS WebDAV Unicode Request Directory Security Bypass

high Nessus Plugin ID 38808

Synopsis

It is possible to access protected resources through WebDAV.

Description

IIS 6.0 does not properly sanitize WebDAV requests. It is possible to access protected resources by inserting a Unicode / (%c0%af) in the URL.

Depending on the remote server configuration, protected resources may be browsed, read and/or modified.

Solution

Disable WebDAV or update the server.

See Also

http://blog.zoller.lu/2009/05/iis-6-webdac-auth-bypass-and-data.html

http://www.nessus.org/u?36818b28

http://www.nessus.org/u?5fefdfc0

https://isc.sans.edu/diary/IIS6.0+WebDav+Remote+Auth+Bypass/6397

https://docs.microsoft.com/en-us/security-updates/SecurityAdvisories/2009/971492

http://unixwiz.net/techtips/ms971492-webdav-vuln.html

https://forums.iis.net/t/1149348.aspx

Plugin Details

Severity: High

ID: 38808

File Name: webdav_iis6_flaw.nasl

Version: 1.21

Type: remote

Family: Web Servers

Published: 5/18/2009

Updated: 11/15/2018

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Vulnerability Information

Excluded KB Items: Settings/disable_cgi_scanning

Exploit Available: true

Exploit Ease: Exploits are available

Reference Information

CVE: CVE-2009-1535

BID: 34993

CWE: 287

AUSCERT: AL-2009.0041

CERT-FI: 038/2009

CERTA: CERTA-2009-ALE-007