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CVE-2019-9970

Date: March 23, 2019

Open Whisper Signal (aka Signal-Desktop) through 1.23.1 and the Signal Private Messenger application through 4.35.3 for Android are vulnerable to an IDN homograph attack when displaying messages containing URLs. This occurs because the application produces a clickable link even if (for example) Latin and Cyrillic characters exist in the same domain name, and the available font has an identical representation of characters from different alphabets.

Language: Java

Severity Score

Related Resources (6)

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9970
https://github.com/blazeinfosec/advisories/blob/master/signal-advisory.txt
https://github.com/signalapp/Signal-Android/commit/5b534c8b1ad83d10b410341c6e99542c29b05b99
https://nvd.nist.gov/vuln/detail/CVE-2019-9970
http://www.securityfocus.com/bid/107550
https://www.mend.io/vulnerability-database/CVE-2019-9970

Severity Score

Weakness Type (CWE)

Improper Input Validation

CWE-20

Insufficient Information

NVD-CWE-noinfo

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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