IIS 5.x Alternate Data Stream Authentication Bypass

high Nessus Plugin ID 47594
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The remote web server is affected by an authentication bypass vulnerability.


The version of IIS 5.x installed on the remote host is affected by an authentication bypass vulnerability. It is possible to access protected web directories without authentication through use of an Alternate Data Stream to open protected folders.

A remote, unauthenticated attacker can leverage this issue to gain access to protected web directories.


Microsoft has released a set of patches for IIS 5.1.

See Also




Plugin Details

Severity: High

ID: 47594

File Name: iis_alternate_data_stream_authentication_bypass.nasl

Version: 1.29

Type: remote

Family: CGI abuses

Published: 7/5/2010

Updated: 1/19/2021

Dependencies: find_service1.nasl, http_version.nasl, webmirror.nasl

Risk Information

CVSS Score Source: CVE-2010-2731


Risk Factor: Medium

Score: 6.3


Risk Factor: High

Base Score: 7.5

Temporal Score: 6.2

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

Temporal Vector: E:F/RL:OF/RC:ND

Vulnerability Information

CPE: cpe:/a:microsoft:iis

Required KB Items: www/ASP

Excluded KB Items: Settings/disable_cgi_scanning

Exploit Available: true

Exploit Ease: Exploits are available

Exploited by Nessus: true

Patch Publication Date: 9/14/2010

Vulnerability Publication Date: 7/1/2010

Reference Information

CVE: CVE-2010-2731

BID: 41314

IAVA: 2010-A-0120-S

MSFT: MS10-065

Secunia: 40412

MSKB: 2124261, 2271195, 2290570