Trend Micro Security

UltraVNC VNCLog Buffer Overflow

2011年2月15日
  危険度: : 緊急
  CVE識別番号: CVE-2006-1652

  概要

Multiple buffer overflows in (a) UltraVNC (aka Ultr@VNC) 1.0.1 and earlier and (b) tabbed_viewer 1.29 (1) allow user-assisted remote attackers to execute arbitrary code via a malicious server that sends a long string to a client that connects on TCP port 5900, which triggers an overflow in Log::ReallyPrint; and (2) allow remote attackers to cause a denial of service (server crash) via a long HTTP GET request to TCP port 5800, which triggers an overflow in VNCLog::ReallyPrint.


  トレンドマイクロの対策

There are two separate vulnerabilities here; One allows escalated privileges to authenticated users, the other allows remote unauthenticated users to cause a Denial of Service (DoS).

  対応方法

  Trend Micro Deep Security DPI Rule Number: 1000419
  Trend Micro Deep Security DPI Rule Name: 1000419 - UltraVNC VNCLog Buffer Overflow

  影響を受けるソフトウェア

  • Ultr@VNC VNC Viewer 1.0.1
  • Ultr@VNC tabbed_viewer 1.29