What is CVE-2018-9840?

CVE-2018-9840 is a medium-severity vulnerability in Signal. CVSS score: 6.8/10. Published 2018-04-10.

How severe is CVE-2018-9840?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Vulnerability in Signal

CVE-2018-9840

The Open Whisper Signal app before 2.23.2 for iOS allows physically proximate attackers to bypass the screen locker feature via certain rapid sequences of actions that include app opening, clicking on cancel, and using the home button.

EPSS: 0.004 (35.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Signal
N/a — versions n/a

References

cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
cve@mitre.org (Third Party Advisory, x_refsource_MISC, Broken Link)

Frequently asked questions

What is CVE-2018-9840?: CVE-2018-9840 is a medium-severity vulnerability in Signal. CVSS score: 6.8/10. Published 2018-04-10.
How severe is CVE-2018-9840?: Medium severity. CVSS v3 base score is 6.8 out of 10.