CVE-2012-4969

Home/CVE/Microsoft Internet Explorer Use-After-Free Vulnerability

CVE

Microsoft Internet Explorer Use-After-Free Vulnerability

Use-after-free vulnerability in the CMshtmlEd::Exec function in mshtml.dll in Microsoft Internet Explorer 6 through 9 allows remote attackers to execute arbitrary code via a crafted web site, as exploited in the wild in September 2012.

HIGH · CVSS 8.1 ⚠ CISA KEV EPSS 0.91777

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 0% of all CVEs by exploitation likelihood
Public exploit or PoC is available
CVSS base score ≥ 7.0

Sigma rules12 YARA rules0

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Required Remediation

Apply updates per vendor instructions.

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Threat Actors Linked

actorAPT17

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Weakness Classification

CWE-416Use After Free

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Affected Products & Versions

microsoft internet explorerall versions

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Public Exploits & PoCs

remoteMicrosoft Internet Explorer - execCommand Use-After-Free (MS12-063) (Metasploit)verified

pocdev.metasploit.com · ie_execcommand_uaf.rbdev.metasploit.com

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Detection Rules (IDS/IPS)

snort-communityEXPLOIT-KIT Styx exploit kit plugin detection connection jorgtrojan-activity

snort-communityEXPLOIT-KIT Styx exploit kit plugin detection connection jlnptrojan-activity

snort-communityEXPLOIT-KIT Styx exploit kit plugin detection connection jovftrojan-activity

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

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Sigma Hunt Rules

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

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Scoring & Timeline

8.1

HIGH · CVSS v3.1 · cve@mitre.org

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 NVD18 Sep 2012 · 10:39 AM

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

SSVC triage · cisa-vulnrichment

Exploitation

active

Automatable

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.

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Vendor Advisories

cisaKEV-CVE-2012-4969

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References & Sources

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

http://blog.vulnhunt.com/index.php/2012/09/17/ie-execcommand-fuction-use-after-free-vulnerability-0day_en/Broken Link

http://eromang.zataz.com/2012/09/16/zero-day-season-is-really-not-over-yet/Third Party Advisory

http://technet.microsoft.com/security/advisory/2757760PatchVendor Advisory

http://www.kb.cert.org/vuls/id/480095Third Party AdvisoryUS Government Resource

http://www.securitytracker.com/id?1027538Third Party AdvisoryVDB Entry

http://www.securityweek.com/new-internet-explorer-zero-day-being-exploited-wildThird Party Advisory

Show all 11 references

http://www.us-cert.gov/cas/techalerts/TA12-255A.htmlThird Party AdvisoryUS Government Resource

http://www.us-cert.gov/cas/techalerts/TA12-262A.htmlThird Party AdvisoryUS Government Resource

http://www.us-cert.gov/cas/techalerts/TA12-265A.htmlThird Party AdvisoryUS Government Resource

https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15729Third Party Advisory

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2012-4969US Government Resource

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