CVE-2014-1776

Known Exploited Public Exploit

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."

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 77.76% Top 5%
KEV Since 
Vendor Advisory microsoft.com Vendor Advisory microsoft.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://securitytracker.com/id?1030154 vdb entry third party advisory broken link
http://www.osvdb.org/106311 vdb entry broken link
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-021 patch vendor advisory
http://blogs.technet.com/b/srd/archive/2014/04/30/protection-strategies-for-the-security-advisory-2963983-ie-0day.aspx broken link mitigation
http://secunia.com/advisories/57908 third party advisory broken link
http://www.signalsec.com/cve-2014-1776-ie-0day-analysis/ exploit third party advisory
http://www.fireeye.com/blog/uncategorized/2014/04/new-zero-day-exploit-targeting-internet-explorer-versions-9-through-11-identified-in-targeted-attacks.html broken link
http://www.kb.cert.org/vuls/id/222929 third party advisory mitigation us government resource
https://technet.microsoft.com/library/security/2963983 patch mitigation vendor advisory
http://www.securityfocus.com/bid/67075 vdb entry third party advisory broken link
https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-detection-script
https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-mitigation-scripts

Frequently Asked Questions

What is the severity of CVE-2014-1776?
CVE-2014-1776 has been scored as a critical severity vulnerability.
How to fix CVE-2014-1776?
To fix CVE-2014-1776, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2014-1776 being actively exploited in the wild?
It is confirmed that CVE-2014-1776 is actively exploited. Be extra cautious if you are using vulnerable components. According to its EPSS score, there is a ~78% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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