Micosoft Internet Explorer 4.01 javascript URL authentication spoofing

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.8$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Micosoft Internet Explorer 4.01. This impacts an unknown function of the component javascript URL Handler. Performing a manipulation with the input about:%01 results in authentication spoofing. This vulnerability was named CVE-1999-0347. In addition, an exploit is available. Due to its background and reception, this vulnerability has an historic impact. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Micosoft Internet Explorer 4.01. This affects an unknown functionality of the component javascript URL Handler. The manipulation with the input value about:%01 leads to a authentication spoofing vulnerability. CWE is classifying the issue as CWE-290. This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Internet Explorer 4.01 allows remote attackers to read local files and spoof web pages via a "%01" character in an "about:" Javascript URL, which causes Internet Explorer to use the domain specified after the character.

The weakness was presented 01/26/1999 by Georgi Guninski as not defined posting (Bugtraq). It is possible to read the advisory at marc.theaimsgroup.com. This vulnerability is uniquely identified as CVE-1999-0347. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details and a public exploit are known. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/27/2025). Due to its background and reception, this vulnerability has a historic impact.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept.

Upgrading to version 5.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (2069), Exploit-DB (19156), SecurityFocus (BID 197†) and Vulnerability Center (SBV-5506†). Further details are available at marc.theaimsgroup.com. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 8.8

VulDB Base Score: 9.8
VulDB Temp Score: 8.8
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: Authentication spoofing
CWE: CWE-290 / CWE-287
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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Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Internet Explorer 5.0

Timelineinfo

01/26/1999 🔍
01/26/1999 +0 days 🔍
01/26/1999 +0 days 🔍
01/28/1999 +2 days 🔍
10/05/2004 +2077 days 🔍
06/20/2014 +3545 days 🔍
02/27/2025 +3905 days 🔍

Sourcesinfo

Advisory: marc.theaimsgroup.com
Researcher: Georgi Guninski
Status: Confirmed

CVE: CVE-1999-0347 (🔍)
GCVE (CVE): GCVE-0-1999-0347
GCVE (VulDB): GCVE-100-14463
X-Force: 2069
SecurityFocus: 197 - Microsoft Internet Explorer Invalid Byte Cross-Frame Access Vulnerability
Vulnerability Center: 5506 - Microsoft Internet Explorer Cross-Frame Vulnerability, Medium

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

Entryinfo

Created: 06/20/2014 13:11
Updated: 02/27/2025 15:01
Changes: 06/20/2014 13:11 (60), 05/25/2019 09:19 (3), 02/27/2025 15:01 (27)
Complete: 🔍
Cache ID: 216::103

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

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