Published:2018/05/17  Last Updated:2018/05/17

Self-Extracting Archive files created by IExpress may insecurely load Dynamic Link Libraries


Self-extracting archive files created by IExpress may insecurely load Dynamic Link Libraries.

Products Affected

  • Self-extracting archive files created by IExpress bundled with Microsoft Windows


Self-extracting archive files created by IExpress provided Microsoft contain an issue with the DLL search path, which may lead to insecurely loading Dynamic Link Libraries (CWE-427).
Microsoft states that the root cause of this vulnerability is "Application Directory (App Dir) DLL planting" and attacks exploiting this vulnerability are limited, thus there is no plan to release any security updates to address this issue.

For details, refer to "Application Directory (App Dir) DLL planting" released by Microsoft.


Arbitrary code may be executed with the privilege of the user invoking a vulnerable self-extracting archive file.


Apply Workaround
Applying the following workarounds may mitigate the impacts of this vulnerability.

  • Save self-extracting archive files into a newly created directory, and confirm there are no unrelated files in the directory then invoke the files.
  • Make sure there are no suspicious files in the directory where self-extracting archive files are saved.

Vendor Status

Vendor Status Last Update Vendor Notes
Microsoft Japan Co.,Ltd. Vulnerable 2018/05/17


  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

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)
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)


This analysis assumes that the user is tricked into placing a malicious DLL file prepared by an attacker in a specific folder.


Eili Masami reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

Other Information

JPCERT Reports
CERT Advisory
CPNI Advisory
CVE CVE-2018-0598
JVN iPedia JVNDB-2018-000050