JVN#26255241
The installer of "FLET'S VIRUS CLEAR Easy Setup & Application Tool" and "FLET'S VIRUS CLEAR v6 Easy Setup & Application Tool" may insecurely load Dynamic Link Libraries
Overview
The installer of "FLET'S VIRUS CLEAR Easy Setup & Application Tool" and "FLET'S VIRUS CLEAR v6 Easy Setup & Application Tool" provided by NIPPON TELEGRAPH AND TELEPHONE EAST CORPORATION may insecurely load Dynamic Link Libraries.
Products Affected
- FLET'S VIRUS CLEAR Easy Setup & Application Tool ver.11 and earlier versions
- FLET'S VIRUS CLEAR v6 Easy Setup & Application Tool ver.11 and earlier versions
Description
The installer of "FLET'S VIRUS CLEAR Easy Setup & Application Tool" and "FLET'S VIRUS CLEAR v6 Easy Setup & Application Tool" provided by NIPPON TELEGRAPH AND TELEPHONE EAST CORPORATION 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
Use the latest installer
This vulnerability has been already addressed in the latest version (ver.12) released in 2018 March 28.
When installing "FLET'S VIRUS CLEAR Easy Setup & Application Tool" and/or "FLET'S VIRUS CLEAR v6 Easy Setup & Application Tool", use the latest installer according to the information provided by the developer.
If the old version of "FLET'S VIRUS CLEAR Easy Setup & Application Tool" and/or "FLET'S VIRUS CLEAR v6 Easy Setup & Application Tool" obtained from the website before 2017 March 28 resides in your computer, delete it immediately.
Note that this vulnerability affects the installer only, thus users who have already installed "FLET'S VIRUS CLEAR Easy Setup & Application Tool" and/or "FLET'S VIRUS CLEAR v6 Easy Setup & Application Tool" do not need to re-install the software using the latest installer.
For details, refer to the information provided by the developer.
References
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-2018-0507 |
| JVN iPedia |
JVNDB-2018-000004 |