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Last updated: 9/2/2014 1:27:40 PM

CVE Publication rate: 13.63

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Vulnerability Summary for CVE-2014-1776

Original release date: 04/27/2014
Last revised: 05/16/2014
Source: US-CERT/NIST

Overview

Use-after-free vulnerability in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via vectors related to the CMarkup::IsConnectedToPrimaryMarkup function, as exploited in the wild in April 2014. NOTE: this issue originally emphasized VGX.DLL, but Microsoft clarified that "VGX.DLL does not contain the vulnerable code leveraged in this exploit. Disabling VGX.DLL is an exploit-specific workaround that provides an immediate, effective workaround to help block known attacks."

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 10.0 (HIGH) (AV:N/AC:L/Au:N/C:C/I:C/A:C) (legend)
Impact Subscore: 10.0
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service

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US-CERT Vulnerability Note: CERT-VN
Name: VU#222929
External Source: MISC
Name: http://www.signalsec.com/cve-2014-1776-ie-0day-analysis/
External Source: MS
Name: MS14-021
External Source: SECUNIA
Name: 57908
External Source: SECTRACK
Name: 1030154
External Source: CONFIRM
Name: http://blogs.technet.com/b/srd/archive/2014/04/30/protection-strategies-for-the-security-advisory-2963983-ie-0day.aspx
External Source: OSVDB
Name: 106311
External Source: BID
Name: 67075
External Source: MISC
Name: http://www.fireeye.com/blog/uncategorized/2014/04/new-zero-day-exploit-targeting-internet-explorer-versions-9-through-11-identified-in-targeted-attacks.html
External Source: CONFIRM
Name: https://technet.microsoft.com/library/security/2963983
Type: Advisory

Technical Details

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