CVE-2014-1776

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

• blogs.technet.com/b/srd/archive/2014/04/30/protection-strategies-for-the-security-advisory-2963983-ie-0day.aspx · Broken Link, Mitigation
• secunia.com/advisories/57908 · Broken Link
• securitytracker.com/id?1030154 · Broken Link, Third Party Advisory, VDB Entry
• 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
• www.kb.cert.org/vuls/id/222929 · Mitigation, Third Party Advisory, US Government Resource
• www.osvdb.org/106311 · Broken Link
• www.securityfocus.com/bid/67075 · Broken Link, Third Party Advisory, VDB Entry
• www.signalsec.com/cve-2014-1776-ie-0day-analysis/ · Exploit, Third Party Advisory
• docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-021 · Patch, Vendor Advisory
• technet.microsoft.com/library/security/2963983 · Mitigation, Patch, Vendor Advisory
• www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-detection-script · Third Party Advisory
• www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-mitigation-scripts · Third Party Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2014-1776 · US Government Resource