Open Whisper Signal App up to 2.23.1 on iOS Screen Lock access control

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

A vulnerability was found in Open Whisper Signal App up to 2.23.1 on iOS (iOS App Software). It has been declared as critical. This vulnerability affects some unknown functionality of the component Screen Lock. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The bug was discovered 04/10/2018. The weakness was released 04/10/2018 (Website). The advisory is shared for download at nint.en.do. This vulnerability was named CVE-2018-9840 since 04/07/2018. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 2.23.2 eliminates this vulnerability.

Entries connected to this vulnerability are available at VDB-93250, VDB-96989, VDB-108526 and VDB-109805.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Open Whisper Signal App 2.23.2
Patch: github.com

Timelineinfo

04/07/2018 🔍
04/10/2018 +3 days 🔍
04/10/2018 +0 days 🔍
04/10/2018 +0 days 🔍
04/10/2018 +0 days 🔍
02/27/2023 +1784 days 🔍

Sourcesinfo

Advisory: 018a35df7b42b4941cb4dfc9f462b37c3fafd9e9
Status: Not defined

CVE: CVE-2018-9840 (🔍)
See also: 🔍

Entryinfo

Created: 04/10/2018 16:53
Updated: 02/27/2023 10:35
Changes: 04/10/2018 16:53 (59), 01/23/2020 10:01 (1), 02/27/2023 10:35 (5)
Complete: 🔍
Cache ID: 3:72D:103

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