CVE-2014-1776

Published: Apr 27, 2014Modified: Apr 21, 2026CISA KEV

9.8

Vector

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

Exploitability: 3.9 / Impact: 5.9

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

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."

Affected (6)

Products: Microsoft: Internet Explorer

1 product

Internet Explorer

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Microsoft Internet Explorer	Version 6

Configuration B

1 vulnerable

Vulnerable Software	Affected Versions
Microsoft Internet Explorer	Version 7

Configuration C

1 vulnerable · 3 platform

Vulnerable Software	Affected Versions
Microsoft Internet Explorer	Version 8

Running on/with	Platform Versions
Microsoft Windows Server 2003	All versions
Microsoft Windows Xp	All versions
Microsoft Windows Xp	All versions

Configuration D

1 vulnerable · 3 platform

Vulnerable Software	Affected Versions
Microsoft Internet Explorer	Version 9

Running on/with	Platform Versions
Microsoft Windows Server 2008	All versions
Microsoft Windows Server 2008	Version r2 sp1
Microsoft Windows Vista	All versions

Configuration E

1 vulnerable · 3 platform

Vulnerable Software	Affected Versions
Microsoft Internet Explorer	Version 10

Running on/with	Platform Versions
Microsoft Windows 8	All versions
Microsoft Windows Rt	All versions
Microsoft Windows Server 2012	All versions

Configuration F

1 vulnerable · 5 platform

Vulnerable Software	Affected Versions
Microsoft Internet Explorer	Version 11

Running on/with	Platform Versions
Microsoft Windows 7	All versions
Microsoft Windows 8.1	All versions
Microsoft Windows Rt 8.1	All versions
Microsoft Windows Server 2008	Version r2 sp1
Microsoft Windows Server 2012	Version r2

Related CWEs

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (23)

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

Source: secure@microsoft.com

Broken LinkMitigation

http://secunia.com/advisories/57908

Source: secure@microsoft.com

Broken Link

http://securitytracker.com/id?1030154

Source: secure@microsoft.com

Broken LinkThird Party AdvisoryVDB Entry

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

Source: secure@microsoft.com

Broken Link

http://www.kb.cert.org/vuls/id/222929

Source: secure@microsoft.com

MitigationThird Party AdvisoryUS Government Resource

http://www.osvdb.org/106311

Source: secure@microsoft.com

Broken Link

http://www.securityfocus.com/bid/67075

Source: secure@microsoft.com

Broken LinkThird Party AdvisoryVDB Entry

http://www.signalsec.com/cve-2014-1776-ie-0day-analysis/

Source: secure@microsoft.com

ExploitThird Party Advisory

https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-021

Source: secure@microsoft.com

PatchVendor Advisory

https://technet.microsoft.com/library/security/2963983

Source: secure@microsoft.com

MitigationPatchVendor Advisory

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

Source: af854a3a-2127-422b-91ae-364da2661108

Broken LinkMitigation

http://secunia.com/advisories/57908

Source: af854a3a-2127-422b-91ae-364da2661108

Broken Link

http://securitytracker.com/id?1030154

Source: af854a3a-2127-422b-91ae-364da2661108

Broken LinkThird Party AdvisoryVDB Entry

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

Source: af854a3a-2127-422b-91ae-364da2661108

Broken Link

http://www.kb.cert.org/vuls/id/222929

Source: af854a3a-2127-422b-91ae-364da2661108

MitigationThird Party AdvisoryUS Government Resource

http://www.osvdb.org/106311

Source: af854a3a-2127-422b-91ae-364da2661108

Broken Link

http://www.securityfocus.com/bid/67075

Source: af854a3a-2127-422b-91ae-364da2661108

Broken LinkThird Party AdvisoryVDB Entry

http://www.signalsec.com/cve-2014-1776-ie-0day-analysis/

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitThird Party Advisory

https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-021

Source: af854a3a-2127-422b-91ae-364da2661108

PatchVendor Advisory

https://technet.microsoft.com/library/security/2963983

Source: af854a3a-2127-422b-91ae-364da2661108

MitigationPatchVendor Advisory

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

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

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

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2014-1776

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

US Government Resource

Timeline

No history available yet.