Home/CVE/The Open Whisper Signal app before 2.23.2 for iOS allows physically proximate attackers to bypass the screen locker feat
CVE

CVE-2018-9840

The Open Whisper Signal app before 2.23.2 for iOS allows physically proximate attackers to bypass the screen locker feat

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.

MEDIUM · CVSS 6.8 EPSS 0.00058
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  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules1 YARA rules0
▤

Affected Products & Versions

1
signal< 2.23.2
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumFile Access Of Signal Desktop Sensitive Data
▣

Scoring & Timeline

6.8
MEDIUM · CVSS v3.0 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD10 Apr 2018 · 05:29 AM
CVSS VectorCVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://nint.en.do/Signal-Bypass-Screen-locker.phpBroken LinkThird Party Advisory
https://github.com/signalapp/Signal-iOS/commit/018a35df7b42b4941cb4dfc9f462b37c3fafd9e9PatchThird Party Advisory
https://github.com/signalapp/Signal-iOS/commits/release/2.23.2Issue TrackingPatchThird Party Advisory
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