J-Security Center

Title: Windows Kernel Font Buffer Overflow Vulnerability

Severity: HIGH

Description:

The Microsoft Windows Kernel is prone to a locally exploitable privilege-escalation vulnerability. This issue is caused by an unchecked buffer when handling malicious fonts. In particular, the operating system fails to perform sufficient bounds checking when processing font-related data. This will potentially allow an attacker to corrupt kernel memory with attacker-specified data.The attacker may then gain control over execution flow and completely compromise the vulnerable computer.

Exploitation attempts could also result in a denial of service. Microsoft has reported that the vulnerability will most likely cause a denial of service on Windows XP SP2 platforms. The vendor has also stated that this vulnerability is not critical on Windows 98/98SE/ME, possibly because of lack of multiuser support on the operating system.

Affected Products:

  • Avaya DefinityOne Media Servers
  • Avaya IP600 Media Servers
  • Avaya S3400 Message Application Server
  • Avaya S8100 Media Servers
  • Microsoft Windows 2000 Advanced Server
  • Microsoft Windows 2000 Advanced Server SP1
  • Microsoft Windows 2000 Advanced Server SP2
  • Microsoft Windows 2000 Advanced Server SP3
  • Microsoft Windows 2000 Advanced Server SP4
  • Microsoft Windows 2000 Datacenter Server
  • Microsoft Windows 2000 Datacenter Server SP1
  • Microsoft Windows 2000 Datacenter Server SP2
  • Microsoft Windows 2000 Datacenter Server SP3
  • Microsoft Windows 2000 Datacenter Server SP4
  • Microsoft Windows 2000 Professional
  • Microsoft Windows 2000 Professional SP1
  • Microsoft Windows 2000 Professional SP2
  • Microsoft Windows 2000 Professional SP3
  • Microsoft Windows 2000 Professional SP4
  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Server SP1
  • Microsoft Windows 2000 Server SP2
  • Microsoft Windows 2000 Server SP3
  • Microsoft Windows 2000 Server SP4
  • Microsoft Windows 2000 Terminal Services
  • Microsoft Windows 2000 Terminal Services SP1
  • Microsoft Windows 2000 Terminal Services SP2
  • Microsoft Windows 98
  • Microsoft Windows 98SE
  • Microsoft Windows ME
  • Microsoft Windows Server 2003 Datacenter Edition Itanium
  • Microsoft Windows Server 2003 Enterprise Edition Itanium
  • Microsoft Windows Server 2003 Itanium
  • Microsoft Windows XP 64-bit Edition
  • Microsoft Windows XP 64-bit Edition SP1
  • Microsoft Windows XP 64-bit Edition Version 2003
  • Microsoft Windows XP 64-bit Edition Version 2003 SP1
  • Microsoft Windows XP Home
  • Microsoft Windows XP Home SP1
  • Microsoft Windows XP Home SP2
  • Microsoft Windows XP Media Center Edition
  • Microsoft Windows XP Media Center Edition SP1
  • Microsoft Windows XP Media Center Edition SP2
  • Microsoft Windows XP Professional
  • Microsoft Windows XP Professional SP1
  • Microsoft Windows XP Professional SP2
  • Microsoft Windows XP Tablet PC Edition
  • Microsoft Windows XP Tablet PC Edition SP1
  • Microsoft Windows XP Tablet PC Edition SP2

References:

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