MultipleVNC Integer Overflow Vulnerability

  Severity: CRITICAL
  CVE Identifier: CVE-2009-0388
  Advisory Date: FEB 15, 2011

  DESCRIPTION

Multiple integer signedness errors in (1) UltraVNC 1.0.2 and 1.0.5 and (2) TightVnc 1.3.9 allow remote VNC servers to cause a denial of service (heap corruption and application crash) or possibly execute arbitrary code via a large length value in a message, related to the (a) ClientConnection::CheckBufferSize and (b) ClientConnection::CheckFileZipBufferSize functions in ClientConnection.cpp.

  TREND MICRO PROTECTION INFORMATION

Trend Micro Deep Security shields networks through Deep Packet Inspection (DPI) rules. Trend Micro customers using OfficeScan with Intrusion Defense Firewall (IDF) plugin are also protected from attacks using these vulnerabilities. Please refer to the filter number and filter name when applying appropriate DPI and/or IDF rules.

  SOLUTION

  Trend Micro Deep Security DPI Rule Number: 1003290
  Trend Micro Deep Security DPI Rule Name: 1003290 - TightVNC VNCViewer Authenticate Buffer Overflow

  AFFECTED SOFTWARE AND VERSION

  • Tightvnc Tightvnc 1.3.9
  • Ultravnc Ultravnc 1.0.2
  • Ultravnc Ultravnc 1.0.5