Microsoft Internet Explorer up to 6 CSS input validation

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.7$0-$5k0.00

Summaryinfo

A vulnerability has been found in Microsoft Internet Explorer up to 6 and classified as critical. This affects an unknown function of the component CSS Handler. Performing a manipulation results in input validation. This vulnerability is cataloged as CVE-2006-3451. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability classified as critical has been found in Microsoft Internet Explorer up to 6 (Web Browser). This affects an unknown part of the component CSS Handler. The manipulation with an unknown input 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 confidentiality, integrity, and availability. The summary by CVE is:

Microsoft Internet Explorer 5 SP4 and 6 do not properly garbage collect when "multiple imports are used on a styleSheets collection" to construct a chain of Cascading Style Sheets (CSS), which allows remote attackers to execute arbitrary code via unspecified vectors.

The weakness was shared 08/08/2006 by Sam Thomas as MS06-042 as confirmed bulletin (Technet). It is possible to read the advisory at microsoft.com. This vulnerability is uniquely identified as CVE-2006-3451 since 07/07/2006. 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 private exploit is available.

It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 22184 (MS06-042: Cumulative Security Update for Internet Explorer (918899)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins. The commercial vulnerability scanner Qualys is able to test this issue with plugin 100036 (Microsoft Cumulative Security Update for Internet Explorer (MS06-042)).

Applying the patch MS06-042 is able to eliminate this problem. The bugfix is ready for download at windowsupdate.microsoft.com. A possible mitigation has been published 9 months after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 4502.

The vulnerability is also documented in the databases at X-Force (28037), Tenable (22184), SecurityFocus (BID 19316†), OSVDB (27854†) and Secunia (SA21396†). Further details are available at techworld.com. The entries VDB-1028, VDB-2344, VDB-2343 and VDB-2437 are related to this item. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Support

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Private
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 22184
Nessus Name: MS06-042: Cumulative Security Update for Internet Explorer (918899)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: MS06-042
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

ISS Proventia IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

07/07/2006 🔍
08/08/2006 +32 days 🔍
08/08/2006 +0 days 🔍
08/08/2006 +0 days 🔍
08/08/2006 +0 days 🔍
08/08/2006 +0 days 🔍
08/08/2006 +0 days 🔍
08/09/2006 +0 days 🔍
08/09/2006 +0 days 🔍
03/28/2007 +231 days 🔍
01/20/2025 +6508 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS06-042
Researcher: Sam Thomas
Status: Confirmed

CVE: CVE-2006-3451 (🔍)
GCVE (CVE): GCVE-0-2006-3451
GCVE (VulDB): GCVE-100-2439

OVAL: 🔍

CERT: 🔍
X-Force: 28037
SecurityFocus: 19316 - Microsoft Internet Explorer Chained Cascading Style Sheets Remote Code Execution Vulnerability
Secunia: 21396 - Internet Explorer Multiple Vulnerabilities, Highly Critical
OSVDB: 27854 - Microsoft IE Chained CSS Imports Memory Corruption
SecurityTracker: 1016663 - Microsoft Internet Explorer Bugs Let Remote Users Obtain Information or Execute Arbitrary Code
Vulnerability Center: 12497 - [MS06-042] Microsoft Internet Explorer Chained Cascading Style Sheets Code Execution, Medium
Vupen: ADV-2006-3212

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

Entryinfo

Created: 08/09/2006 12:00
Updated: 01/20/2025 23:41
Changes: 08/09/2006 12:00 (93), 04/07/2017 12:01 (10), 03/13/2021 11:36 (3), 01/20/2025 23:41 (16)
Complete: 🔍
Cache ID: 216:7B8:103

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

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Are you interested in using VulDB?

Download the whitepaper to learn more about our service!