Is CVE-2018-9840 in the CISA KEV catalog?

No. CVE-2018-9840 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-9840?

CVE-2018-9840 has a CVSS v3 base score of 6.8 (MEDIUM).

What is the EPSS score for CVE-2018-9840?

CVE-2018-9840 has an EPSS score of 0.43% (35th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-9840?

Upgrade signal to 2.23.2 or later.

CVE & CISA-KEV Catalog

CVE-2018-9840

MEDIUM

6.8

CVSS v3

NVD

Description

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.

How to fix

Remediation Available

signalNVD

Affected:< 2.23.2Fixed in:2.23.2CVE-2018-9840derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorPhysical

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.43%probability of exploitation in 30 days

35thpercentile

Low risk: more likely to be exploited than 35% of all known CVEs.

References

Patch2

Third-Party Advisory1

nint.en.do

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.