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Vulnerability Details : CVE-2010-3971 (2 public exploits)

Use-after-free vulnerability in the CSharedStyleSheet::Notify function in the Cascading Style Sheets (CSS) parser in mshtml.dll, as used in Microsoft Internet Explorer 6 through 8 and other products, allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a self-referential @import rule in a stylesheet, aka "CSS Memory Corruption Vulnerability."
Publish Date : 2010-12-22 Last Update Date : 2018-10-12
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- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact Complete (There is total information disclosure, resulting in all system files being revealed.)
Integrity Impact Complete (There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the entire system being compromised.)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of ServiceExecute CodeMemory corruption
CWE ID 399

- Related OVAL Definitions

Title Definition Id Class Family
CSS Memory Corruption Vulnerability oval:org.mitre.oval:def:12382 windows
MS11-003: Cumulative Security Update for Internet Explorer (2482017) oval:gov.nist.fdcc.patch:def:11729 windows
MS11-018: Cumulative Security Update for Internet Explorer (2497640) oval:gov.nist.fdcc.patch:def:11741 windows
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2010-3971

# Product Type Vendor Product Version Update Edition Language
1 Application Microsoft IE 7 Version Details Vulnerabilities
2 Application Microsoft IE 8 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Microsoft IE 2

- References For CVE-2010-3971
VUPEN ADV-2010-3156
MS MS11-003
CERT-VN VU#634956
VUPEN ADV-2011-0318
SECTRACK 1024922
BID 45246 Microsoft Internet Explorer CSS Parsing Remote Memory Corruption Vulnerability Release Date:2011-03-08
EXPLOIT-DB 15746 Internet Explorer 8 CSS Parser Exploit Author:Nephi Johnson Release Date:2010-12-15 (windows) remote
EXPLOIT-DB 15708 Internet Explorer 8 CSS Parser Denial of Service Author:WooYun Release Date:2010-12-08 (windows) dos
Microsoft Advisory Microsoft Security Advisory (2488013): Vulnerability in Internet Explorer Could Allow Remote Code Execution - Version: 2.0 Revision Note: V2.0 (February 8, 2011): Advisory updated to reflect publication of security bulletin. Summary: Microsoft has completed the investigation into public reports of this vulnerability. We have issued MS11-003 to address this issue. For more information about this issue, including download links for an available security update, please review MS11-003. The vulnerability addressed is the CSS Memory Corruption Vulnerability - CVE-2010-3971.Release Date:2011-02-08 CONFIRM
FULLDISC 20101208 IE CSS parser dos bug

- Metasploit Modules Related To CVE-2010-3971

MS11-003 Microsoft Internet Explorer CSS Recursive Import Use After Free
This module exploits a memory corruption vulnerability within Microsoft\'s HTML engine (mshtml). When parsing an HTML page containing a recursive CSS import, a C++ object is deleted and later reused. This leads to arbitrary code execution. This exploit utilizes a combination of heap spraying and the .NET 2.0 'mscorie.dll' module to bypass DEP and ASLR. This module does not opt-in to ASLR. As such, this module should be reliable on all Windows versions with .NET 2.0.50727 installed.
Module type : exploit Rank : good Platforms : Windows

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