JVN#68345747
The installers of multiple CELSYS,Inc. software may insecurely load Dynamic Link Libraries
Overview
The installers of multiple software provided by CELSYS,Inc. may insecurely load Dynamic Link Libraries.
Products Affected
- CLIP STUDIO PAINT (for Windows) EX/PRO/DEBUT Ver.1.7.3 and earlier
- CLIP STUDIO ACTION (for Windows) Ver.1.5.5 and earlier, with its timestamp prior to April 25, 2018, 12:11:31
- CLIP STUDIO MODELER (for Windows) Ver.1.6.3 and earlier, with its timestamp prior to April 25, 2018, 17:02:49
Description
The installers of multiple software provided by CELSYS,Inc. 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.
Also when executing the installer, be sure to check there are no suspicious files in the directory where the installer resides.
Note that this vulnerability affects the installer only, thus users who have already installed the software do not need to re-install the software.
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
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-2018-0580 |
| JVN iPedia |
JVNDB-2018-000041 |