Headline
CVE-2022-43543: +Message App improper handling of Unicode control characters
KDDI +Message App, NTT DOCOMO +Message App, and SoftBank +Message App contain a vulnerability caused by improper handling of Unicode control characters. +Message App displays text unprocessed, even when control characters are contained, and the text is shown based on Unicode control character’s specifications. Therefore, a crafted text may display misleading web links. As a result, a spoofed URL may be displayed and phishing attacks may be conducted. Affected products and versions are as follows: KDDI +Message App for Android prior to version 3.9.2 and +Message App for iOS prior to version 3.9.4, NTT DOCOMO +Message App for Android prior to version 54.49.0500 and +Message App for iOS prior to version 3.9.4, and SoftBank +Message App for Android prior to version 12.9.5 and +Message App for iOS prior to version 3.9.4
Published:2022/12/21 Last Updated:2022/12/21
Overview
+Message App contains a vulnerability caused by improper handling of Unicode control characters.
Products Affected
SoftBank Corp.
- +Message App for Android prior to version 12.9.5
- +Message App for iOS prior to version 3.9.4
NTT DOCOMO, INC.
- +Message App for Android prior to version 54.49.0500
- +Message App for iOS prior to version 3.9.4
KDDI CORPORATION
- +Message App for Android prior to version 3.9.2
- +Message App for iOS prior to version 3.9.4
Description
+Message App displays text unprocessed, even when control characters are contained, and the text is shown based on Unicode control character’s specifications.
Therefore, a crafted text may display misleading web links (CWE-451).
Impact
A spoofed URL may be displayed and phishing attacks may be conducted.
Solution
Update the Application
Update to the latest version according to the information provided by the developer.
Vendor Status
JPCERT/CC Addendum
Vulnerability Analysis by JPCERT/CC
CVSS v3 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Attack Vector(AV)
Physical §
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 ®
None (N)
Scope(S)
Unchanged (U)
Changed ©
Confidentiality Impact©
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:M/Au:N/C:N/I:P/A:N
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©
None (N)
Partial §
Complete ©
Integrity Impact(I)
None (N)
Partial §
Complete ©
Availability Impact(A)
None (N)
Partial §
Complete ©
Credit
Akaki Tsunoda reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
Other Information