Published:2017/11/09  Last Updated:2017/11/09

JVN#71284826
Installer of HYPER SBI may insecurely load Dynamic Link Libraries

Overview

Installer of HYPER SBI may insecurely load Dynamic Link Libraries.

Products Affected

  • HYPER SBI Ver. 2.2 and earlier

Description

HYPER SBI provided by SBI SECURITIES Co.,Ltd. is a trading tool. Installer of HYPER SBI 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.
Users who already have installed HYPER SBI do not need to re-install the application, because this issue affects the installer only.
According to the developer, existing users who update using the newest installer will need to perform data migration in advance. For more information, refer to the information provided by the developer.

Vendor Status

Vendor Status Last Update Vendor Notes
SBI SECURITIES Co.,Ltd. Vulnerable 2017/11/09 SBI SECURITIES Co.,Ltd. website

References

  1. 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

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

Yuto Iso of NTT Security (Japan) KK 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-2017-10885
JVN iPedia JVNDB-2017-000234