CVE-2019-9970

EUVD-2019-19324
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.5 MEDIUM
NETWORK
LOW
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 61%
Affected Products (NVD)
VendorProductVersion
signalsignal-desktop
𝑥
≤ 1.23.1
𝑥
= Vulnerable software versions
References
http://www.securityfocus.com/bid/107550
https://github.com/blazeinfosec/advisories/blob/master/signal-advisory.txt
http://www.securityfocus.com/bid/107550
https://github.com/blazeinfosec/advisories/blob/master/signal-advisory.txt