JVN#33836375
"Jiyu Kukan Toku-Toku coupon" App vulnerable to improper server certificate verification
Overview
"Jiyu Kukan Toku-Toku coupon" App is vulnerable to improper server certificate verification.
Products Affected
- Jiyu Kukan Toku-Toku coupon App for iOS versions 3.5.0 and earlier
- Jiyu Kukan Toku-Toku coupon App for Android versions 3.5.0 and earlier
Description
"Jiyu Kukan Toku-Toku coupon" App provided by RUNSYSTEM CO.,LTD. is vulnerable to improper server certificate verification (CWE-295).
Impact
A man-in-the-middle attack may allow an attacker to eavesdrop on an encrypted communication.
Solution
Update the application
Update the application to the latest version according to the information provided by the developer.
Apply the workaround
Applying the following workarounds may mitigate the impacts of this vulnerability.
- Use the application while connected to the carrier's network or a trusted Wi-Fi access point
Vendor Status
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
Ryo Nihonyanagi of BroadBand Security, Inc. 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-2023-29501 |
| JVN iPedia |
JVNDB-2023-000057 |