Keybase Desktop Client Cache information disclosure

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CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.2	$0-$5k	0.00

A vulnerability was found in Keybase Desktop Client (affected version not known) and classified as problematic. Affected by this issue is an unknown code block of the component Cache Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. Impacted is confidentiality. CVE summarizes:

Keybase Desktop Client before 5.6.0 on Windows and macOS, and before 5.6.1 on Linux, allows an attacker to obtain potentially sensitive media (such as private pictures) in the Cache and uploadtemps directories. It fails to effectively clear cached pictures, even after deletion via normal methodology within the client, or by utilizing the "Explode message/Explode now" functionality. Local filesystem access is needed by the attacker.

The weakness was shared 02/23/2021. The advisory is available at johnjhacking.com. This vulnerability is handled as CVE-2021-23827 since 01/11/2021. The exploitation is known to be easy. Local access is required to approach this attack. The requirement for exploitation is a simple authentication. The technical details are unknown and an exploit is not available.

Upgrading eliminates this vulnerability.

Productinfoedit

Vendor

Keybase

Name

Desktop Client

CPE 2.3infoedit

🔒

CPE 2.2infoedit

🔒

CVSSv3infoedit

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.2

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2infoedit

AV	AC	Au	C	I	A
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🔍	🔍	🔍	🔍	🔍	🔍
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
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unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

NVD Base Score: 🔒

Exploitinginfoedit

Class: Information disclosure
CWE: CWE-200
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
Geopolitics: 🔍
Economy: 🔍
Predictions: 🔍
Remediation: 🔍

Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfoedit

01/11/2021 CVE assigned
02/23/2021 +43 days Advisory disclosed
02/23/2021 +0 days VulDB entry created
03/04/2021 +9 days VulDB last update

Sourcesinfoedit

Advisory: johnjhacking.com
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2021-23827 (🔒)

Entryinfoedit