Microsoft IIS up to 5.1 HTTP 1.0 Request IP address information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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3.0$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Microsoft IIS 2.0/3.0/4.0/5.0/5.1. Affected by this issue is some unknown functionality of the component HTTP 1.0 Request Handler. Such manipulation leads to information disclosure (IP address). This vulnerability is traded as CVE-2000-0649. The attack may be launched remotely. Furthermore, there is an exploit available. This vulnerability is historically impactful due to its background and the reception it garnered. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Microsoft IIS 2.0/3.0/4.0/5.0/5.1 (Web Server) and classified as problematic. Affected by this issue is an unknown function of the component HTTP 1.0 Request Handler. The manipulation with an unknown input leads to a information disclosure vulnerability (IP Address). Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. CVE summarizes:

IIS 4.0 allows remote attackers to obtain the internal IP address of the server via an HTTP 1.0 request for a web page which is protected by basic authentication and has no realm defined.

The issue has been introduced in 08/24/1996. The weakness was shared 07/13/2000 as not defined posting (NTBugtraq). The advisory is shared for download at archives.neohapsis.com. This vulnerability is handled as CVE-2000-0649. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. Technical details are unknown but a public exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 05/23/2025). The MITRE ATT&CK project declares the attack technique as T1592. This vulnerability has a historic impact due to its background and reception.

The exploit is available at exploit-db.com. It is declared as highly functional. The vulnerability was handled as a non-public zero-day exploit for at least 1419 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 10759 (Web Server HTTP Header Internal IP Disclosure), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Web Servers and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 86247 (Web Server Internal IP Address/Internal Network Name Disclosure Vulnerability).

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (20096), Tenable (10759), SecurityFocus (BID 1499†) and Vulnerability Center (SBV-1130†). The entry VDB-15766 is related to this item. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.1
VulDB Meta Temp Score: 3.0

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
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

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 10759
Nessus Name: Web Server HTTP Header Internal IP Disclosure
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 10759
OpenVAS Name: Private IP address leaked in HTTP headers
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/24/1996 🔍
07/13/2000 +1419 days 🔍
07/13/2000 +0 days 🔍
07/13/2000 +0 days 🔍
07/13/2000 +0 days 🔍
09/14/2001 +428 days 🔍
04/29/2003 +592 days 🔍
06/25/2014 +4075 days 🔍
05/23/2025 +3985 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: archives.neohapsis.com
Status: Confirmed

CVE: CVE-2000-0649 (🔍)
GCVE (CVE): GCVE-0-2000-0649
GCVE (VulDB): GCVE-100-15764
SecurityFocus: 1499 - Microsoft IIS Internal IP Address Disclosure Vulnerability
Vulnerability Center: 1130 - Microsoft IIS Reveals Internal IP Address upon HTTP 1.0 Request, Medium

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

Entryinfo

Created: 06/25/2014 15:29
Updated: 05/23/2025 03:26
Changes: 06/25/2014 15:29 (70), 05/09/2019 18:19 (8), 05/23/2025 03:26 (20)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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