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


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.

Eili Masami reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 7.8 (High) [IPA Score]
  • Attack Vector: Local
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: Required
  • Scope: Unchanged
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: High
CVSS V2 Severity:
Base Metrics 6.8 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: None
  • Confidentiality Impact: Partial
  • Integrity Impact: Partial
  • Availability Impact: Partial
Affected Products

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


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 Information

Microsoft Corporation
CWE (What is CWE?)

  1. No Mapping(CWE-Other) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2018-0598

  1. JVN : JVN#72748502
  2. JVN : JVNTA#91240916
  3. National Vulnerability Database (NVD) : CVE-2018-0598
Revision History

  • [2018/05/17]
      Web page was published
  • [2018/08/21]
      References : Content was added