// For flags

CVE-2013-1300

Microsoft Windows NtUserMessageCall Privilege Escalation Vulnerability

Severity Score

7.2
*CVSS v2

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

2
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows Server 2012, and Windows RT does not properly handle objects in memory, which allows local users to gain privileges via a crafted application, aka "Win32k Memory Allocation Vulnerability."

win32k.sys en controladores kernel-mode en Microsoft Windows XP SP2 y SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 y R2 SP1, Windows 7 SP1, Windows 8, Windows Server 2012, y Windows RT no gestiona de forma adecuada los objetos en memoria, lo que provoca que usuarios locales obtengan privilegios a través de una aplicación manipulada, también conocido como "Win32k Memory Allocation Vulnerability."

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Windows. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within NtUserMessageCall. The issue lies in the handling of boolean arguments. An attacker can leverage this vulnerability to raise privileges and execute code under the context of SYSTEM.

A kernel pool overflow in Win32k which allows local privilege escalation. The kernel shellcode nulls the ACL for the winlogon.exe process (a SYSTEM process). This allows any unprivileged process to freely migrate to winlogon.exe, achieving privilege escalation. Used in pwn2own 2013 by MWR to break out of chrome's sandbox. NOTE: when you exit the meterpreter session, winlogon.exe is likely to crash.

*Credits: Nils and Jon of MWR Labs
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete
Attack Vector
Local
Attack Complexity
Medium
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2013-01-12 CVE Reserved
  • 2013-07-10 CVE Published
  • 2014-05-06 First Exploit
  • 2024-08-03 EPSS Updated
  • 2024-08-06 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-264: Permissions, Privileges, and Access Controls
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Microsoft
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Windows 7
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*sp1, x64
Affected
Microsoft
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Windows 7
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*sp1, x86
Affected
Microsoft
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Windows 8
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-x64
Affected
Microsoft
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Windows 8
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-x86
Affected
Microsoft
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Windows Rt
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--
Affected
Microsoft
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Windows Server 2003
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*sp2
Affected
Microsoft
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Windows Server 2008
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*sp2, itanium
Affected
Microsoft
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Windows Server 2008
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*sp2, x64
Affected
Microsoft
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Windows Server 2008
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*sp2, x86
Affected
Microsoft
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Windows Server 2012
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--
Affected
Microsoft
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Windows Vista
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*sp2
Affected
Microsoft
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Windows Xp
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*sp3
Affected
Microsoft
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Windows Xp
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-sp2, x64
Affected