CVE-2018-9840
UnknownEPSS 0.43%
Last modified
CVE-2018-9840 is a vulnerability of currently unknown severity. 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 estimates a 0.43% chance of exploitation in the next 30 days.
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.
Metrics
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Signal | Signal | < 2.23.2 |
References
- http://nint.en.do/Signal-Bypass-Screen-locker.phpBroken Link, Third Party Advisory
- https://github.com/signalapp/Signal-iOS/commit/018a35df7b42b4941cb4dfc9f462b37c3fafd9e9Patch, Third Party Advisory
- https://github.com/signalapp/Signal-iOS/commits/release/2.23.2Issue Tracking, Patch, Third Party Advisory
- http://nint.en.do/Signal-Bypass-Screen-locker.phpBroken Link, Third Party Advisory
- https://github.com/signalapp/Signal-iOS/commit/018a35df7b42b4941cb4dfc9f462b37c3fafd9e9Patch, Third Party Advisory
- https://github.com/signalapp/Signal-iOS/commits/release/2.23.2Issue Tracking, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2018-9840?
Severity scoring for CVE-2018-9840 is pending analysis. The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.
How do I fix CVE-2018-9840?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2018-9840?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST