CVE-2018-9840
6.8 · MEDIUMOverview
CVE-2018-9840 is a medium-severity vulnerability affecting signal signal. It was published on April 10, 2018 and has a CVSS 3.0 base score of 6.8 (MEDIUM).
This vulnerability has a CVSS 3.0 base score of 6.8, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from signal. Update signal to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| signal | signal | >= 0, < 2.23.2 | Affected |
References
Frequently Asked Questions
What is CVE-2018-9840?
CVE-2018-9840 is a medium-severity vulnerability affecting signal signal. It was published on April 10, 2018 and has a CVSS 3.0 base score of 6.8 (MEDIUM).
How severe is CVE-2018-9840?
This vulnerability has a CVSS 3.0 base score of 6.8, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2018-9840?
Check the references section for vendor advisories and patches from signal. Update signal to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2018-9840?
CyberStrike's AI-powered security agents can automatically detect CVE-2018-9840 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
Related MEDIUM CVEs from 2018
View all →A Path Traversal issue was discovered in Schneider Electric Pelco VideoXpert Enterprise all versions
Vulnerability in the Oracle Marketing component of Oracle E-Business Suite (subcomponent: Products).
Vulnerability in the Oracle WebCenter Sites component of Oracle Fusion Middleware (subcomponent: Adv
SAGA1-L8B with any firmware versions prior to A0.10 are vulnerable to an attack that an attacker wit
Online Ticket Booking has CSRF via admin/movieedit.php.
Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Stored Procedure). Suppor
Vulnerability in the Java SE, Java SE Embedded component of Oracle Java SE (subcomponent: JGSS). Sup
An exploitable improper authorization vulnerability exists in admin_peers API of cpp-ethereum's JSON
IBM Doors Web Access 9.5 and 9.6 could allow an attacker with physical access to the system to log i
The 'crowd-application' plugin module (notably used by the Google Apps plugin) in Atlassian Crowd fr
In versions 13.0.0, 12.0.0-12.1.3, or 11.6.0-11.6.2, an F5 BIG-IP virtual server using the URL categ
An issue was discovered in soliduiserver/deviceserviceaction.cpp in KDE Plasma Workspace before 5.12