Published:2017/05/26  Last Updated:2017/06/02

JVN#92422409
The installer of the Ministry of Justice [The electronic authentication system based on the commercial registration system "The CRCA user's Software"] may insecurely load Dynamic Link Libraries

Overview

The installer of The electronic authentication system based on the commercial registration system "The CRCA user's Software" provided by the Ministry of Justice may insecurely load Dynamic Link Libraries.

Products Affected

  • The electronic authentication system based on the commercial registration system "The CRCA user's Software" Ver1.7 and earlier

Description

The electronic authentication system based on the commercial registration system "The CRCA user's Software" provided by the Ministry of Justice contains an issue with the DLL search path, which may lead to insecurely loading Dynamic Link Libraries.

Impact

Arbitrary code may be executed with the privilege of the user invoking the installer.

Solution

Use the latest installer
Use the latest installer according to the information provided by the developer.
Users who already have installed The electronic authentication system based on the commercial registration system "The CRCA user's Software" do not need to re-install the application, because this issue affects the installer only.
 

References

JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

CVSS v3 CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Base Score: 7.8
Attack Vector(AV) Physical (P) Local (L) Adjacent (A) Network (N)
Attack Complexity(AC) High (H) Low (L)
Privileges Required(PR) High (H) Low (L) None (N)
User Interaction(UI) Required (R) None (N)
Scope(S) Unchanged (U) Changed (C)
Confidentiality Impact(C) None (N) Low (L) High (H)
Integrity Impact(I) None (N) Low (L) High (H)
Availability Impact(A) None (N) Low (L) High (H)
CVSS v2 AV:N/AC:M/Au:N/C:P/I:P/A:P
Base Score: 6.8
Access Vector(AV) Local (L) Adjacent Network (A) Network (N)
Access Complexity(AC) High (H) Medium (M) Low (L)
Authentication(Au) Multiple (M) Single (S) None (N)
Confidentiality Impact(C) None (N) Partial (P) Complete (C)
Integrity Impact(I) None (N) Partial (P) Complete (C)
Availability Impact(A) None (N) Partial (P) Complete (C)

Comment

This analysis assumes that the user is tricked into placing a malicious DLL file prepared by an attacker in a specific folder.

Credit

Eili Masami of Tachibana Lab. reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

Other Information

JPCERT Alert
JPCERT Reports
CERT Advisory
CPNI Advisory
TRnotes
CVE CVE-2017-2177
JVN iPedia JVNDB-2017-000102

Update History

2017/06/02
Replaced Japanese product name to English product name