JVN#86200862
Self-Extracting Archives created by 7-ZIP32.DLL may insecurely load Dynamic Link Libraries
Overview
Self-extracting archive files created by 7-ZIP32.DLL may insecurely load Dynamic Link Libraries.
Products Affected
- Self-extracting archive files created by 7-ZIP32.DLL ver9.22.00.01 and earlier
Description
7-ZIP32.DLL is an open source library for compressing and decompressing 7z and zip format files. It can also create self-extracting archive files.
Self-extracting archive files created by 7-ZIP32.DLL contain 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 a vulnerable self-extracting archive file.
Solution
Use the Latest Library to Recreate Self-Extracting Archive files
Use the latest version according to the information provided by the developer, and recreate self-extracting archive files.
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) |
| 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 in the same directory as a vulnerable self-extracting archive file.
Credit
Eili Masami of Tachibana Lab. 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-2017-2107 |
| JVN iPedia |
JVNDB-2017-000024 |
Update History
- 2017/02/20
- Akky update status
- 2017/02/24
- Akky update status