73783 : Microsoft Windows win32k.sys Driver Use After Free Unspecified Local Privilege Escalation (2011-1883)
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Disclosure Date


Microsoft Windows contains a use-after-free flaw related to win32k.sys. The issue is triggered when a local attacker runs a crafted program. This may allow an attacker to gain elevated privileges and execute arbitrary code.


Location: Local Access Required
Attack Type: Input Manipulation
Impact: Loss of Integrity
Solution: Patch / RCS
Exploit: Exploit Private
Disclosure: Vendor Verified, Coordinated Disclosure
OSVDB: Authentication Required


Currently, there are no known workarounds or upgrades to correct this issue. However, Microsoft has released a patch to address this vulnerability. Check the vendor advisory or solution in the references section.


Microsoft Corporation
Windows XP
Professional x64 Edition SP2
Windows Vista
x64 Edition SP1
x64 Edition SP2
Windows Server 2008
for 32-bit Systems
for 32-bit Systems SP2
for x64-based Systems
for x64-based Systems SP2
for Itanium-based Systems
for Itanium-based Systems SP2
Windows 7
for x64-based Systems
for x64-based Systems SP1
for 32-bit Systems
for 32-bit Systems SP1
Windows Server 2003
x64 Edition SP2
with SP2 for Itanium-based Systems
Windows Server 2008 R2
for Itanium-based Systems
for x64-based Systems SP1
for Itanium-based Systems SP1
for x64-based Systems



CVSSv2 Score

CVSSv2 Base Score = 7.2
Source: nvd.nist.gov | Generated: 2011-07-14 | Disagree?

Access_vector_0 Access_complexity_2 Authentication_2 Confidentiality_impact_2 Integrity_impact_2 Availability_impact_2


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