Published:2018/09/27 Last Updated:2018/10/01
JVN#37288228
+Message App fails to verify SSL server certificates
Overview
+Message App fails to verify SSL server certificates.
Products Affected
SoftBank
- +Message App for Android prior to version 10.1.7
- +Message App for iOS prior to version 1.1.23
- +Message App for Android prior to version 42.40.2800
- +Message App for iOS prior to version 1.1.23
- +Message App for Android prior to version 1.0.6
- +Message App for iOS prior to version 1.1.23
Description
+Message App fails to verify SSL server certificates.
Impact
A man-in-the-middle attack may allow an attacker to eavesdrop on an encrypted communication.
Solution
Update the Application
Update to the latest version according to the information provided by the developer.
Vendor Status
| Vendor | Status | Last Update | Vendor Notes |
|---|---|---|---|
| KDDI CORPORATION | Vulnerable | 2018/09/27 | KDDI CORPORATION website |
| NTT DOCOMO, INC. | Vulnerable | 2018/09/27 | NTT DOCOMO, INC. website |
| SoftBank | Vulnerable | 2018/09/27 | SoftBank website |
References
JPCERT/CC Addendum
Vulnerability Analysis by JPCERT/CC
CVSS v3
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Base Score:
5.6
| 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) |
CVSS v2
AV:N/AC:H/Au:N/C:P/I:P/A:N
Base Score:
4.0
| 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 a man-in-the-middle attack being conducted by an attacker that places a malicious wireless LAN access point.
Credit
ma.la of LINE Corporation reported this vulnerability to the developer, and also to IPA in order to notify users of its solution through JVN.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
Other Information
| JPCERT Alert |
|
| JPCERT Reports |
|
| CERT Advisory |
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| CPNI Advisory |
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| TRnotes |
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| CVE |
CVE-2018-0691 |
| JVN iPedia |
JVNDB-2018-000100 |
Update History
- 2018/10/01
- Information under [Credit] was fixed