Apache HTTP Server up to 2.2.3 on Windows mod_alias information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Apache HTTP Server up to 2.2.3 on Windows. Affected is an unknown function of the component mod_alias. Executing a manipulation can lead to information disclosure. This vulnerability is tracked as CVE-2006-4110. The attack can be launched remotely. Moreover, an exploit is present. Disabling the affected component is suggested.

Detailsinfo

A vulnerability has been found in Apache HTTP Server up to 2.2.3 on Windows (Web Server) and classified as critical. This vulnerability affects some unknown functionality of the component mod_alias. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

Apache 2.2.2, when running on Windows, allows remote attackers to read source code of CGI programs via a request that contains uppercase (or alternate case) characters that bypass the case-sensitive ScriptAlias directive, but allow access to the file on case-insensitive file systems.

The bug was discovered 08/08/2006. The weakness was disclosed 08/11/2006 by Susam Pal with Infosys Technologies Ltd. as not defined posting (Bugtraq). The advisory is shared for download at securityfocus.com. This vulnerability was named CVE-2006-4110 since 08/14/2006. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are unknown but a public exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

After even before and not, there has been an exploit disclosed. It is possible to download the exploit at downloads.securityfocus.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 22203 (Apache on Windows mod_alias URL Validation Canonicalization CGI Source Disclosure), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CGI abuses and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 87269 (Apache CGI Script Source Code Information Disclosure Vulnerability).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at httpd.apache.org.

The vulnerability is also documented in the databases at X-Force (28357), Exploit-DB (28365), Tenable (22203), SecurityFocus (BID 19447†) and OSVDB (27913†). Once again VulDB remains the best source for vulnerability data.

Productinfo

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Support

  • end of life (old version)

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 22203
Nessus Name: Apache on Windows mod_alias URL Validation Canonicalization CGI Source Disclosure
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Disable
Status: 🔍

0-Day Time: 🔍

Patch: httpd.apache.org

Timelineinfo

08/08/2006 🔍
08/09/2006 +1 days 🔍
08/09/2006 +0 days 🔍
08/09/2006 +0 days 🔍
08/11/2006 +1 days 🔍
08/11/2006 +0 days 🔍
08/11/2006 +0 days 🔍
08/13/2006 +1 days 🔍
08/14/2006 +1 days 🔍
08/14/2006 +0 days 🔍
08/14/2006 +0 days 🔍
06/18/2025 +6883 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: securityfocus.com⛔
Researcher: Susam Pal
Organization: Infosys Technologies Ltd.
Status: Confirmed

CVE: CVE-2006-4110 (🔍)
GCVE (CVE): GCVE-0-2006-4110
GCVE (VulDB): GCVE-100-2452
X-Force: 28357 - Apache HTTP Server mod_alias script source information disclosure, Low Risk
SecurityFocus: 19447 - Apache CGI Script Source Code Information Disclosure Vulnerability
Secunia: 21490 - Apache "mod_alias" URL Validation Canonicalization Vulnerability, Less Critical
OSVDB: 27913 - Apache HTTP Server on Windows mod_alias URL Validation Canonicalization CGI Source Disclosure
Vulnerability Center: 12512 - Apache mod_alias CGI Source Code Revelation via Case-Sensitive Alias Directive Arguments, Medium
Vupen: ADV-2006-3265

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/14/2006 12:34
Updated: 06/18/2025 18:03
Changes: 08/14/2006 12:34 (82), 04/16/2019 15:10 (11), 03/13/2021 12:02 (2), 05/12/2025 08:33 (19), 06/18/2025 18:03 (3)
Complete: 🔍
Cache ID: 216:65A:103

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