Microsoft IIS 4.0 HTTP Request Malformed Header input validation

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 problematic, was found in Microsoft IIS 4.0. Affected is an unknown function of the component HTTP Request Handler. The manipulation as part of Malformed Header results in input validation. This vulnerability is reported as CVE-1999-0867. Moreover, an exploit is present. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Microsoft IIS 4.0 (Web Server). Affected is some unknown functionality of the component HTTP Request Handler. The manipulation as part of a Malformed Header leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on availability. CVE summarizes:

Denial of service in IIS 4.0 via a flood of HTTP requests with malformed headers.

The weakness was disclosed 08/11/1999 by Nobuo Miwa with Microsoft as MS99-029 as confirmed bulletin (Technet). The advisory is shared for download at microsoft.com. This vulnerability is traded as CVE-1999-0867. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are unknown but a public exploit is available.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 10119 (Microsoft IIS Malformed HTTP Request Header Remote DoS), 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.

Upgrading eliminates this vulnerability. Applying the patch MS99-029 is able to eliminate this problem. The bugfix is ready for download at microsoft.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at X-Force (8641), Exploit-DB (19457), Tenable (10119), SecurityFocus (BID 579†) and Vulnerability Center (SBV-37†). The entry VDB-14771 is pretty similar. 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: 5.3
VulDB Meta Temp Score: 4.8

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

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
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: 10119
Nessus Name: Microsoft IIS Malformed HTTP Request Header Remote DoS
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: MS99-029
ISS Proventia IPS: 🔍

Timelineinfo

08/11/1999 🔍
08/11/1999 +0 days 🔍
08/11/1999 +0 days 🔍
08/11/1999 +0 days 🔍
08/20/1999 +9 days 🔍
10/08/2002 +1145 days 🔍
06/21/2014 +4274 days 🔍
12/01/2024 +3816 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS99-029
Researcher: Nobuo Miwa
Organization: Microsoft
Status: Confirmed

CVE: CVE-1999-0867 (🔍)
GCVE (CVE): GCVE-0-1999-0867
GCVE (VulDB): GCVE-100-14772
X-Force: 8641
SecurityFocus: 579 - NT IIS Malformed HTTP Request Header DoS Vulnerability
Vulnerability Center: 37 - [MS99-029] DoS in Microsoft IIS 4.0 via HTTP Flood with Malformed Headers, High

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

Entryinfo

Created: 06/21/2014 19:18
Updated: 12/01/2024 23:47
Changes: 06/21/2014 19:18 (73), 05/04/2019 17:44 (1), 12/01/2024 23:47 (25)
Complete: 🔍
Cache ID: 216::103

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