CVE-2014-1776

CRITICAL KEV

Microsoft Internet Explorer <11 - Use After Free

Title source: llm

Description

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."

References (13)

[Broken Link, Mitigation] http://blogs.technet.com/b/srd/archive/2014/04/30/protection-strategies-for-the-security-advisory-2963983-ie-0day.aspx

[Broken Link] http://secunia.com/advisories/57908

[Broken Link, Third Party Advisory, VDB Entry] http://securitytracker.com/id?1030154

[Broken Link] http://www.fireeye.com/blog/uncategorized/2014/04/new-zero-day-exploit-targeting-internet-explorer-versions-9-through-11-identified-in-targeted-attacks.html

[Mitigation, Third Party Advisory, US Government Resource] http://www.kb.cert.org/vuls/id/222929

[Broken Link] http://www.osvdb.org/106311

[Broken Link, Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/67075

[Exploit, Third Party Advisory] http://www.signalsec.com/cve-2014-1776-ie-0day-analysis/

[Patch, Vendor Advisory] https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-021

[Mitigation, Patch, Vendor Advisory] https://technet.microsoft.com/library/security/2963983

[Third Party Advisory] https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-detection-script

[Third Party Advisory] https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-mitigation-scripts

[Third Party Advisory, US Government Resource] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2014-1776

Scores

CVSS v3 9.8

EPSS 0.8402

EPSS Percentile 99.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CISA KEV 2022-01-28

VulnCheck KEV 2014-04-27

InTheWild.io 2018-10-12

ENISA EUVD EUVD-2014-1850

CWE

CWE-416

Status published

Products (6)

microsoft/internet_explorer 6

microsoft/internet_explorer 7

microsoft/internet_explorer 8

microsoft/internet_explorer 9

microsoft/internet_explorer 10

microsoft/internet_explorer 11

Published Apr 27, 2014

KEV Added Jan 28, 2022

Tracked Since Feb 18, 2026