Auth bypass in Signal Private Messenger
CVE-2019-17191
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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.018 (77.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.1% 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
Weakness classification (CWE)
References
- news.ycombinator.com/item (Exploit, Third Party Advisory, Issue Tracking)
- twitter.com/moxie/status/1180261210341511168 (Third Party Advisory)
- bugs.chromium.org/p/project-zero/issues/detail (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-17191?
- CVE-2019-17191 is a high-severity vulnerability in Signal Private Messenger, classified under Incorrect Authorization. CVSS score: 7.5/10. Published 2019-10-05.
- How severe is CVE-2019-17191?
- High severity. CVSS v3 base score is 7.5 out of 10.