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.
Does this matter?
Lower severity and a low EPSS score (1.83%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.0
- 6.5 MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
- EPSS
- 1.83% probability · 78th percentile
- CISA KEV
- Not listed
- Affected
- signal/private messenger · signal/signal-desktop
- Source
- cve@mitre.org
References
- http://www.securityfocus.com/bid/107550Third Party Advisory, VDB Entry
- https://github.com/blazeinfosec/advisories/blob/master/signal-advisory.txtThird Party Advisory
- http://www.securityfocus.com/bid/107550Third Party Advisory, VDB Entry
- https://github.com/blazeinfosec/advisories/blob/master/signal-advisory.txtThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.