Netscape Enterprise Server 3.6 HTTP Basic Authentication IDN memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.4$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Netscape Enterprise Server 3.6. This vulnerability affects unknown code of the component HTTP Basic Authentication IDN Handler. The manipulation results in memory corruption. This vulnerability was named CVE-1999-0853. The attack may be performed from remote. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Netscape Enterprise Server 3.6 (Web Server). It has been classified as very critical. Affected is an unknown part of the component HTTP Basic Authentication IDN Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Buffer overflow in Netscape Enterprise Server and Netscape FastTrack Server allows remote attackers to gain privileges via the HTTP Basic Authentication procedure.

The weakness was presented 12/01/1999 with ISS X-Force (Website). The advisory is available at securityfocus.com. This vulnerability is traded as CVE-1999-0853. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/22/2025).

The vulnerability scanner Nessus provides a plugin with the ID 100511 (Netscape Enterprise Server Basic Authentication Buffer Overflow RCE (EGGBASKET/XP_NS-HTTPD)), 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 86011 (Netscape Enterprise Server Authentication Protocol Buffer Overflow Vulnerability).

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (3586), Tenable (100511), SecurityFocus (BID 847†) and Vulnerability Center (SBV-758†). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.4

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
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: 100511
Nessus Name: Netscape Enterprise Server Basic Authentication Buffer Overflow RCE (EGGBASKET/XP_NS-HTTPD)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 800940
OpenVAS Name: Netscape FastTrack Server Authentication Buffer Overflow Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
McAfee IPS: 🔍
McAfee IPS Version: 🔍

ISS Proventia IPS: 🔍

Timelineinfo

12/01/1999 🔍
12/01/1999 +0 days 🔍
12/01/1999 +0 days 🔍
12/01/1999 +0 days 🔍
01/29/2003 +1155 days 🔍
06/22/2014 +4162 days 🔍
05/30/2017 +1073 days 🔍
10/22/2025 +3067 days 🔍

Sourcesinfo

Vendor: netscape.com

Advisory: securityfocus.com⛔
Organization: ISS X-Force
Status: Confirmed

CVE: CVE-1999-0853 (🔍)
GCVE (CVE): GCVE-0-1999-0853
GCVE (VulDB): GCVE-100-15018
X-Force: 3586
SecurityFocus: 847 - Netscape Enterprise & FastTrack Authentication Buffer Overflow Vulnerability
Vulnerability Center: 758 - Netscape Enterprise FastTrack Authentication Buffer Overflow Vulnerability, High

Entryinfo

Created: 06/22/2014 15:33
Updated: 10/22/2025 18:56
Changes: 06/22/2014 15:33 (65), 05/08/2019 16:18 (8), 10/22/2025 18:56 (19)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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