JVN#76780067
Installer of 7-Zip for Windows may insecurely load Dynamic Link Libraries
Overview
The installer of 7-Zip for Windows may insecurely load Dynamic Link Libraries.
Products Affected
- 7 Zip for Windows 16.02 and earlier
Description
7-Zip for Windows is an open source compression and decompression software. The installer of 7-Zip for Windows contains an issue with the DLL search path, which may lead to insecurely loading Dynamic Link Libraries.
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.
This vulnerability has been addressed in 7-Zip for Windows 16.0.3.
Vendor Status
| Vendor | Link |
| Igor Pavlov | 7-Zip |
| 7-Zip 16.03 | |
| HISTORY of the 7-Zip -- 16.03 (2016-09-28) |
References
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) |
Comment
This analysis assumes that the user is tricked into placing a malicious DLL file prepared by an attacker in a specific folder.
Credit
Takashi Yoshikawa of Mitsui Bussan Secure Directions 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-2016-7804 |
| JVN iPedia |
JVNDB-2016-000211 |