JVN#72748502
Self-Extracting Archive files created by IExpress may insecurely load Dynamic Link Libraries
Overview
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
Description
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.
Impact
Arbitrary code may be executed with the privilege of the user invoking a vulnerable self-extracting archive file.
Solution
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.
References
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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
| 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 reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
Other Information
| JPCERT Alert |
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| JPCERT Reports |
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| CERT Advisory |
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| CPNI Advisory |
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| TRnotes |
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| CVE |
CVE-2018-0598 |
| JVN iPedia |
JVNDB-2018-000050 |