JVN#67305782
Installer of CASL II simulator(self-extract format) may insecurely load Dynamic Link Libraries
Overview
Installer of CASL II simulator(self-extract format) may insecurely load Dynamic Link Libraries.
Products Affected
- Installer of CASL II simulator(self-extract format)
Description
Installer of CASL II simulator(self-extract format) provided by INFORMATION-TECHNOLOGY PROMOTION AGENCY, JAPAN (IPA) 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
Do not use CASL II simulator(self-extract format) installer
The developer has stated that the development and support of CASL II simulator(self-extract format) has been discontinued, thus recommends users to stop using the installer.
Vendor Status
| Vendor | Status | Last Update | Vendor Notes |
|---|---|---|---|
| INFORMATION-TECHNOLOGY PROMOTION AGENCY, JAPAN (IPA) | Vulnerable | 2017/06/09 | INFORMATION-TECHNOLOGY PROMOTION AGENCY, JAPAN (IPA) website |
References
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Japan Vulnerability Note 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
Yuji Tounai of NTT Communications Corporation 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-2017-2220 |
| JVN iPedia |
JVNDB-2017-000117 |