Vulnerability in Signal Private Messenger
CVE-2019-9970
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.
EPSS: 0.018 (76.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.
Affected products
- Signal Private_messenger
- Signal Signal-desktop
- N/a — versions n/a
References
- cve@mitre.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
- cve@mitre.org (Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2019-9970?
- CVE-2019-9970 is a medium-severity vulnerability in Signal Private Messenger. CVSS score: 6.5/10. Published 2019-03-24.
- How severe is CVE-2019-9970?
- Medium severity. CVSS v3 base score is 6.5 out of 10.