JVN#30866130
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
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.
Products Affected
- The electronic authentication system based on the commercial registration system "The CRCA user's Software" Ver1.8 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 (CWE-427).
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.
Vendor Status
| Vendor | Link |
| The Ministry of Justice | The electronic authentication system based on the commercial registration system "The CRCA user's Software" download page |
References
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Japan Vulnerability Notes JVNTA#91240916
Insecure DLL Loading and Command Execution Issues on Many Windows Application Programs
JPCERT/CC Addendum
Vulnerability Analysis by JPCERT/CC
| 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) |
| 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
DigiGnome and BlackWingCat of Pink Flying Whale reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
Other Information
| JPCERT Alert |
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| JPCERT Reports |
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| CERT Advisory |
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| CPNI Advisory |
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| TRnotes |
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| CVE |
CVE-2017-10831 |
| JVN iPedia |
JVNDB-2017-000205 |