Published:2017/08/25  Last Updated:2017/08/25

JVN#36303528
Installer and self-extracting archive containing the installer of "Security Setup Tool" may insecurely load Dynamic Link Libraries

Overview

The installer and the self-extracting archive containing the installer of "Security Setup Tool" provided by NIPPON TELEGRAPH AND TELEPHONE WEST CORPORATION may insecurely load Dynamic Link Libraries.

Products Affected

  • Security Setup Tool all versions

Description

The installer and the self-extracting archive containing the installer of "Security Setup 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 or the self-extracting archive.

Solution

Do not invoke either the installer or the self-extracting archive
If the installer or the self-extracting archive containing the installer of  "Security Setup Tool" still resides in your computer and "Security Setup Tool" has not yet been installed, do not install it.  Delete the executable file immediately.
Note that this issue only affects the installer or the self-extracting archive only, thus users who have already installed "Security Setup Tool" are not affected.

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

  1. 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

CVSS v3 CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Base Score: 7.8
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)
CVSS v2 AV:N/AC:M/Au:N/C:P/I:P/A:P
Base Score: 6.8
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-2017-10830
JVN iPedia JVNDB-2017-000215