Published:2022/05/27  Last Updated:2022/05/27

JVN#13878856
Mobaoku-Auction & Flea Market App for iOS vulnerable to improper server certificate verification

Overview

Mobaoku-Auction & Flea Market App for iOS is vulnerable to improper server certificate verification.

Products Affected

  • Mobaoku-Auction & Flea Market App for iOS versions prior to 5.5.16

Description

Mobaoku-Auction & Flea Market App for iOS provided by DeNA 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.
The developer released the following version that fixes the vulnerability on February 21, 2022:

  • Mobaoku-Auction & Flea Market App for iOS version 5.5.16

Vendor Status

Vendor Status Last Update Vendor Notes
DeNA Co., Ltd. Vulnerable 2022/05/27

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:N
Base Score: 4.8
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

Okazawa Yoshihiro 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-2022-29482
JVN iPedia JVNDB-2022-000040