JVN#75453852
LINE for iOS fails to verify SSL server certificates
Overview
LINE for iOS fails to verify SSL server certificates.
Products Affected
- LINE for iOS version 7.1.3 to 7.1.5
Description
LINE for iOS provided by LINE Corporation fails to verify SSL server certificates due to the vulnerability existed in the Third Party SDK which is incorporated in the application.
Impact
A man-in-the-middle attack may allow an attacker to eavesdrop on an encrypted communication.
According to the developer, text messages, LINE login credentials (passwords), free voice calls, and free video calls are not affected by this vulnerability.
For details, refer to the information provided by the developer.
Solution
Update the Software
Update the software to the latest version according to the information provided by the developer.
This vulnerability was addressed in LINE for iOS version 7.16 released in 2017 November 24.
Vendor Status
| Vendor | Link |
| LINE Corporation | [Vulnerability Report] SSL Server Certificate Validation Deficiency in LINE for iOS |
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 a man-in-the-middle attack being conducted by an attacker that places a malicious wireless LAN access point.
Credit
LINE Corporation reported this vulnerability to JPCERT/CC to notify users of its solution through JVN. JPCERT/CC and LINE Corporation coordinated under the 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-2018-0518 |
| JVN iPedia |
JVNDB-2018-000016 |
Update History
- 2018/02/23
- Fixed the version information under [Products Affected] and JVN iPedia link was added under the section [Other Information]