Winny node information processing vulnerability


Winny contains a vulnerability in the processing of node information.

Winny is a P2P file sharing software. Winny contains a vulnerability in the processing of node information, which can be used to launch Distributed Denial of Service (DDoS) attacks.

Fuyumasa Takatsu of University of Tsukuba reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V2 Severity:
Base Metrics 5.0 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
Affected Products

Isamu Kaneko
  • Winny 2.0b7.1 and earlier


A user may take part in a DDoS attack by a remote attacker.

[Do not use Winny]
Please discontinue use of Winny.
Vendor Information

CWE (What is CWE?)

  1. No Mapping(CWE-Other) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2010-2362

  1. JVN : JVN#25393522
  2. National Vulnerability Database (NVD) : CVE-2010-2362
  3. ISS X-Force Database : 61277
Revision History

  • [2010/08/20]
      Web page published