ISUCON5 qualifier portal web application (eventapp) vulnerable to OS command injection


ISUCON5 qualifier portal web application (eventapp) provided by ISUCON organizers contains an OS command injection (CWE-78) vulnerability.

Shoji Baba 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 6.5 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: Single Instance
  • Confidentiality Impact: Partial
  • Integrity Impact: Partial
  • Availability Impact: Partial
Affected Products

ISUCON organizers
  • ISUCON5 qualifier portal web application (eventapp) versions prior to commit 150e3e6d851acb31a0b15ce93380a7dab14203fa


A logged in attacker may execute arbitrary OS commands on the server.

[Update the Software]
Update to the latest version according to the information provided by the developer.
Vendor Information

ISUCON organizers
CWE (What is CWE?)

  1. OS Command Injection(CWE-78) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2015-5673

  1. JVN : JVN#04281281
  2. National Vulnerability Database (NVD) : CVE-2015-5673
Revision History

  • [2015/11/02]
      Web page was published
      Vendor Information : Content was added
      References : Content was added