CVE-2019-17191 Information

Description

The Signal Private Messenger application before 4.47.7 for Android allows a caller to force a call to be answered without callee user interaction via a connect message. The existence of the call is noticeable to the callee; however the audio channel may be open before the callee can block eavesdropping.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Reference

https://bugs.chromium.org/p/project-zero/issues/detail?id=1943 https://news.ycombinator.com/item?id=21161432 https://twitter.com/moxie/status/1180261210341511168

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

7.5