Published:2011/11/21  Last Updated:2011/11/21

Nikki vulnerable to OS command injection


Nikki from HP no Mawashimono contains an OS command injection vulnerability.

Products Affected

  • Nikki ver 6.6 and earlier


Nikki from HP no Mawashimono is a CGI software for posting diary entries. Nikki contains an OS command injection vulnerability.


An arbitrary OS command may be executed with the privileges of the web server.


Update the software
Update to the latest version according to the information provided by the developer.

Vendor Status

Vendor Link
HP no Mawashimono Top page


JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2011.11.21

Measures Conditions Severity
Access Required can be attacked over the Internet using packets
  • High
Authentication anonymous or no authentication (IP addresses do not count)
  • High
User Interaction Required the vulnerability can be exploited without an honest user taking any action
  • High
Exploit Complexity the user must be convinced to take a difficult or suspicious action. If the honest user must have elevated privileges, they are likely to be more suspiciouse
  • High

Description of each analysis measures


Masako Ohno reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

Other Information

JPCERT Reports
CERT Advisory
CPNI Advisory
CVE CVE-2011-4002
JVN iPedia JVNDB-2011-000076