CVSS 9.3 CRITICAL Bulletin: MS13-037 Published: 2013-05-14

CVE-2013-2551: Microsoft Internet Explorer VML Integer Overflow (Use-After-Free)

Technical intelligence and weaponization dossier for CVE-2013-2551. Documented exploitation across 1 active malware families totaling 20,595 analyzed telemetry samples.

Attributed Families
1
Sample Volume
20,595
CVSS Vector
AV:N/AC:M/Au:N/C:C/I:C/A:C
Official NIST NVD
View NVD Record →

Vulnerability Specifications & Root Cause

Vulnerability ID CVE-2013-2551
Common Name / Bulletin Microsoft Internet Explorer VML Integer Overflow (Use-After-Free) (MS13-037)
CWE Classification CWE-189: Integer Overflow leading to Memory Corruption
Affected Software & Versions Microsoft Internet Explorer 6 through 10
Technical Root Cause Integer overflow in the Vector Markup Language (VML) implementation (vml.dll) during shape stroke color array allocation.
Associated ATT&CK Techniques
  • T1189 — Associated ATT&CK Technique
  • T1204 — Associated ATT&CK Technique

Malware Families Weaponizing CVE-2013-2551

Empirical catalog telemetry verifies that the following 1 malware families weaponize this vulnerability for initial access, privilege escalation, or lateral movement:

1 families
Malware Family Category Catalog Samples Operational Profile
ramnitWorm Banker20,595Ramnit (also known as Nimnul or Cosmu) is a devastating, multi-faceted banking trojan and worm that first emerged in 2010. Originally conceived as a Windows fil...

SOC Detection & Threat Hunting Guidance

Threat hunting leads and behavioral telemetry patterns to identify weaponized exploitation of CVE-2013-2551 in enterprise networks:

Web pages loading VML stroke elements with color attributes containing numeric integer values exceeding 0xFFFF, triggering heap corruption.

Remediation & Defensive Hardening

SOC containment checklist and attack surface reduction measures to neutralize exploitation:

Actionable Guidance: Apply MS13-037; unregister vgw.dll / vml.dll using regsvr32 -u "%ProgramFiles%\Common Files\Microsoft Shared\VGX\vgx.dll".

For end-to-end incident response procedures, consult our dedicated playbook: Active Incident Response Playbook →

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