JVN#14926025
Installer of ”Flets Install Tool” may insecurely load Dynamic Link Libraries
Overview
Installer of "Flets Install Tool" provided by NIPPON TELEGRAPH AND TELEPHONE WEST CORPORATION may insecurely load Dynamic Link Libraries.
Products Affected
- Flets Install Tool (All versions distributed through the website till 2017 August 8)
Description
Installer of "Flets Install 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
Use the latest installer
Use the latest installer according to the information provided by the developer.
Note that this vulnerability affects the installer only, thus users who have already installed "Flets Install Tool" do not need to re-install the software using the latest installer.
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
-
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 | |
| JPCERT Reports | |
| CERT Advisory | |
| CPNI Advisory | |
| TRnotes | |
| CVE |
CVE-2017-10828 |
| JVN iPedia |
JVNDB-2017-000214 |