Published:2012/04/24  Last Updated:2012/05/08

Multiple JustSystems products vulnerable to buffer overflow


Multiple products provided by JustSystems Corporation contain a buffer overflow vulnerability.

Products Affected

  • Ichitaro 2012 Shou
  • Ichitaro 2011 Sou
  • Ichitaro 2011/2010/2009/2008/2007/2006
  • Ichitaro Government 2010/2009/2008/2007/2006
  • Ichitaro Portable with oreplug
  • Ichitaro Viewer
  • JUST School 2010/2009
  • JUST School
  • JUST Jump 4
  • JUST Frontier
  • oreplug
  • Shuriken 2010/2009/2008/2007/Pro4
  • Shuriken 2010 CE/2009 CE/2008 CE/2007 [Corporate Edition]/Pro4 [Corporate Edition]
  • Rekishimail Sengokubusho no missho/Bakumatsushishi no missho


Multiple products provided by JustSystems Corporation contain a buffer overflow vulnerability due to improper handling of image files.


If this vulnerability is exploited, a system may be crashed or arbitrary code may be executed.


Update the Software
Apply the appropriate update according to the information provided by the developer.


  1. Secunia Advisory SA47363
    JustSystems Multiple Products Two Vulnerabilities

JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2012.04.24

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 user must be convinced to take a standard action that does not feel harmful to most users, such as click on a link or view a file
  • Mid
Exploit Complexity some expertise and/or luck required (most buffer overflows, guessing correctly in small space, expertise in Windows function calls)
  • Mid-High

Description of each analysis measures


Tielei Wang of Georgia Tech Information Security Center reported this vulnerability to JPCERT/CC via The Secunia Vulnerability Coordination Reward Programme (SVCRP).
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

Other Information

JPCERT Reports
CERT Advisory
CPNI Advisory
CVE CVE-2012-0269
JVN iPedia JVNDB-2012-000035

Update History

Information under the section "References" was added.
Information under the section "Products Affected" was updated.