Multiple directory traversal vulnerabilities in AttacheCase


AttacheCase is an open source file encryption software provided by HiBARA Software. AttacheCase contains a directory traversal vulnerability (CWE-22) due to a flaw in processing filenames in ATC files.

Taizoh Tsukamoto of Mitsui Bussan Secure Directions, Inc. reported CVE-2018-0660 vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 3.3 (Low) [IPA Score]
  • Attack Vector: Local
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: Required
  • Scope: Unchanged
  • Confidentiality Impact: None
  • Integrity Impact: Low
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics 4.3 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
Affected Products

HiBARA Software
  • AttacheCase ver. and earlier
  • AttacheCase ver. and earlier

[Updated on August 31, 2018] This advisory was first published on August 6, 2018. At that point it was stated that the affected products were "AttacheCase ver. and earlier" and "AttacheCase ver. and earlier". However, later on it was found that the updated versions "AttacheCase ver." and "AttacheCase ver." contained insufficient fixes. Therefore, information under [Products Affected] was modified as of as of August 31, 2018.

* Decrypting a crafted ATC file may result in creation of an arbitrary file or overwriting of an existing file - CVE-2018-0659
* Decrypting a crafted ATC file may result in creation of an arbitrary file - CVE-2018-0660

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

HiBARA Software
CWE (What is CWE?)

  1. Path Traversal(CWE-22) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2018-0659
  2. CVE-2018-0660

  1. JVN : JVN#62121133
  2. National Vulnerability Database (NVD) : CVE-2018-0659
  3. National Vulnerability Database (NVD) : CVE-2018-0660
Revision History

  • [2018/08/06]
      Web page was published
  • [2018/08/31]
      Information under [Products Affected] was modified.
  • [2019/07/25]
      References : Contents were added