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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.018 (78.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 78.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000
Affected products
References
- www.securityfocus.com/bid/107550 (VDB Entry, Third Party Advisory, vdb-entry)
- github.com/blazeinfosec/advisories/blob/master/signal-advisory.txt (Third Party Advisory)
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.