Microsoft Internet Explorer 6 Address Bar authentication spoofing

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Microsoft Internet Explorer 6. It has been classified as critical. This issue affects some unknown processing of the component Address Bar. Performing a manipulation results in authentication spoofing. This vulnerability was named CVE-2008-4787. The attack may be initiated remotely. In addition, an exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Microsoft Internet Explorer 6 (Web Browser). It has been classified as critical. This affects an unknown code block of the component Address Bar. The manipulation with an unknown input 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 integrity, and availability. The summary by CVE is:

Visual truncation vulnerability in Microsoft Internet Explorer 6 allows remote attackers to spoof the address bar via a URL with a hostname containing many   (Non-Blocking Space character) sequences, which are rendered as whitespace, aka MSRC ticket MSRC7899, a related issue to CVE-2003-1025.

The issue has been introduced in 03/22/2001. The weakness was presented 10/29/2008 by Amit Klein (Website). It is possible to read the advisory at xforce.iss.net. This vulnerability is uniquely identified as CVE-2008-4787. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are unknown but a public exploit is available.

The exploit is shared for download at securityfocus.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 2778 days. During that time the estimated underground price was around $25k-$100k.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (46234), Exploit-DB (32539), SecurityFocus (BID 31960†) and Vulnerability Center (SBV-19896†). See VDB-44764 for similar entry. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 4.9

VulDB Base Score: 5.4
VulDB Temp Score: 4.9
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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OpenVAS ID: 900170
OpenVAS Name: Microsoft iExplorer &NBSP
OpenVAS File: 🔍
OpenVAS Family: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/22/2001 🔍
10/27/2008 +2776 days 🔍
10/27/2008 +0 days 🔍
10/29/2008 +1 days 🔍
10/29/2008 +0 days 🔍
10/29/2008 +0 days 🔍
10/29/2008 +0 days 🔍
03/17/2015 +2330 days 🔍
08/04/2025 +3793 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: xforce.iss.net
Researcher: Amit Klein
Status: Confirmed

CVE: CVE-2008-4787 (🔍)
GCVE (CVE): GCVE-0-2008-4787
GCVE (VulDB): GCVE-100-44763
X-Force: 46234
SecurityFocus: 31960 - Microsoft Internet Explorer ' ' Address Bar URI Spoofing Vulnerability
Vulnerability Center: 19896 - Microsoft Internet Explorer 6 URI Spoofing Vulnerability via a Non-Breaking Space Character, Medium

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

Entryinfo

Created: 03/17/2015 16:11
Updated: 08/04/2025 11:59
Changes: 03/17/2015 16:11 (58), 05/07/2019 12:42 (13), 08/02/2021 15:46 (3), 08/04/2025 11:59 (17)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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