iPlanet Web Server 4.1 Host Header information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability was found in iPlanet Web Server 4.1. It has been rated as problematic. Affected by this issue is some unknown functionality of the component Host Header Handler. The manipulation leads to information disclosure. This vulnerability is traded as CVE-2001-0327. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in iPlanet Web Server 4.1 (Web Server). It has been rated as problematic. This issue affects an unknown function of the component Host Header Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. 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. The summary by CVE is:

iPlanet Web Server Enterprise Edition 4.1 and earlier allows remote attackers to retrieve sensitive data from memory allocation pools, or cause a denial of service, via a URL-encoded Host: header in the HTTP request, which reveals memory in the Location: header that is returned by the server.

The weakness was shared 04/17/2001 by Kevin Dunn and Chris Eng with @stake as not defined advisory (Website). It is possible to read the advisory at atstake.com. The identification of this vulnerability is CVE-2001-0327. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 11856 (iPlanet Web Server Enterprise Edition URL-encoded Host: Information 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 86378 (iPlanet Web Server Buffer Overflow Information Disclosure Vulnerability).

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (8285), Tenable (11856), SecurityFocus (BID 6826†), OSVDB (5704†) and Vulnerability Center (SBV-869†). kb.cert.org is providing further details. The entry VDB-16943 is related to this item. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
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: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 11856
Nessus Name: iPlanet Web Server Enterprise Edition URL-encoded Host: Information Disclosure
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/16/2001 🔍
04/17/2001 +0 days 🔍
07/02/2001 +76 days 🔍
07/02/2001 +0 days 🔍
02/09/2003 +587 days 🔍
09/29/2003 +232 days 🔍
04/09/2004 +192 days 🔍
07/04/2014 +3738 days 🔍
10/07/2025 +4113 days 🔍

Sourcesinfo

Advisory: atstake.com
Researcher: Kevin Dunn, Chris Eng
Organization: @stake
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2001-0327 (🔍)
GCVE (CVE): GCVE-0-2001-0327
GCVE (VulDB): GCVE-100-16919
CERT: 🔍
X-Force: 8285
SecurityFocus: 6826 - iPlanet Web Server Response Header Buffer Overflow Vulnerability
OSVDB: 5704 - iPlanet Web Server Enterprise Edition URL-encoded Host: Information Disclosure
Vulnerability Center: 869 - Buffer Overflow in iPlanet Web Server via HTTP Requests with Long Location and Host Headers, High

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 07/05/2014 00:49
Updated: 10/07/2025 10:14
Changes: 07/05/2014 00:49 (64), 05/09/2019 09:55 (11), 06/09/2024 08:59 (17), 10/07/2025 10:14 (4)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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