CVE-2014-1776 · threatengine.sh

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CVE-2014-1776

Microsoft Internet Explorer Memory Corruption Vulnerability

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.".

CRITICAL · CVSS 9.8 ⚠ CISA KEV EPSS 0.84024

Act now

Listed on CISA KEV (known exploited in the wild)
SSVC exploitation status: active
EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
EPSS percentile: top 1% of all CVEs by exploitation likelihood
Public exploit or PoC is available
SSVC automatable: yes - attacks can be scripted at scale
CVSS base score ≥ 7.0

Sigma rules12 YARA rules0

⬢

Required Remediation

Apply updates per vendor instructions.

◆

Threat Actors Linked

2

actorAPT17

actorAPT3

⬡

Weakness Classification

CWE-416Use After Free

CWE-416Use After Free

▤

Affected Products & Versions

1

microsoft internet explorerall versions

⚠

Public Exploits & PoCs

1

pocwww.signalsec.com · cve-2014-1776-ie-0day-analysiswww.signalsec.com

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Detection Rules (IDS/IPS)

2

et-openET WEB_CLIENT Microsoft Application Crash Report Indicates Potential VGX Memory Corruptionattempted-user

et-openET WEB_CLIENT Microsoft Application Crash Report Indicates Potential VGX Memory Corruption 2attempted-user

Open rulesets (ET Open, Snort Community, abuse.ch) link to source. Commercial rulesets are reference-only.

◈

Sigma Hunt Rules

12

Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.

productmediumInternet Explorer DisableFirstRunCustomize Enabled

productmediumInternet Explorer Autorun Keys Modification

relatedcriticalAntivirus Password Dumper Detection

relatedcriticalHacktool Execution - Imphash

relatedcriticalHackTool - Rubeus Execution

relatedcriticalPotential Credential Dumping Via LSASS Process Clone

Show all 12 top matchesrelatedcriticalWCE wceaux.dll Access
relatedcriticalHackTool - Dumpert Process Dumper Default File
relatedcriticalHackTool - Credential Dumping Tools Named Pipe Created
relatedcriticalHackTool - Inveigh Execution
relatedcriticalHackTool - SafetyKatz Execution
relatedcriticalHackTool - Dumpert Process Dumper Execution

See all related Sigma rules for this CVE

▣

Scoring & Timeline

9.8

CRITICAL · CVSS v3.1 · secure@microsoft.com

View on NVD

Attack Vector

Network Adjacent Local Physical

Attack Complexity

Low High

Privileges Required

None Low High

User Interaction

None Required

Scope

Unchanged Changed

Confidentiality

None Low High

Integrity

None Low High

Availability

None Low High

Published to NVD27 Apr 2014 · 10:55 AM

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

SSVC triage · cisa-vulnrichment

Exploitation

active

Automatable

yes

Technical impact

total

SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.

⚑

Vendor Advisories

1

cisaKEV-CVE-2014-1776

🔗

References & Sources

12

Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.

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

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

http://securitytracker.com/id?1030154Broken 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.htmlBroken Link

http://www.kb.cert.org/vuls/id/222929MitigationThird Party AdvisoryUS Government Resource

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

Show all 12 references

http://www.securityfocus.com/bid/67075Broken LinkThird Party AdvisoryVDB Entry

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

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

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

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

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

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