JVN#22272314
Installer of "Flets Setsuzoku Tool" may insecurely load Dynamic Link Libraries
Overview
Installer of "Flets Setsuzoku Tool"provided by NIPPON TELEGRAPH AND TELEPHONE WEST CORPORATION may insecurely load Dynamic Link Libraries.
Products Affected
- Flets Setsuzoku Tool for Windows all versions
Description
Installer of "Flets Setsuzoku Tool"provided by NIPPON TELEGRAPH AND TELEPHONE WEST CORPORATION 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
Do not use "Flets Setsuzoku Tool"
Developer states that they have stopped providing "Flets Setsuzoku Tool" on the website since 2017 June 30.
Do not use "Flets Setsuzoku Tool" because there are no countermeasures provided by the developer against this vulnerability.
For details, refer to the information provided by the developer.
Vendor Status
| Vendor | Status | Last Update | Vendor Notes |
|---|---|---|---|
| NIPPON TELEGRAPH AND TELEPHONE WEST CORPORATION | Vulnerable | 2017/08/25 | NIPPON TELEGRAPH AND TELEPHONE WEST CORPORATION website |
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
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 |
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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-2017-2242 |
| JVN iPedia |
JVNDB-2017-000216 |