gnome-shell 3.15.91 Lock Screen improper authorization

HistoryDiffrelatejsonxmlCTI

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.
4.3	$0-$5k	0.00

Summaryinfo

A vulnerability marked as critical has been reported in gnome-shell 3.15.91. This vulnerability affects unknown code of the component Lock Screen. Performing a manipulation results in improper authorization. This vulnerability is reported as CVE-2019-3820. The attack may be carried out on the physical device. No exploit exists.

Detailsinfo

A vulnerability classified as critical has been found in gnome-shell 3.15.91. This affects an unknown code of the component Lock Screen. The manipulation with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

It was discovered that the gnome-shell lock screen since version 3.15.91 did not properly restrict all contextual actions. An attacker with physical access to a locked workstation could invoke certain keyboard shortcuts, and potentially other actions.

The bug was discovered 02/15/2019. The weakness was disclosed 02/06/2019 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is uniquely identified as CVE-2019-3820 since 01/03/2019. An attack has to be approached locally. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1548.002 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 208068 (Ubuntu 16.04 LTS : GNOME Shell vulnerabilities (USN-7052-1)), which helps to determine the existence of the flaw in a target environment. The commercial vulnerability scanner Qualys is able to test this issue with plugin 172451 (OpenSUSE Security Update for gnome-shell (openSUSE-SU-2019:1529-1)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (208068). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

gnome-shell

Version

3.15.91

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.3

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

NVD Base Score: 4.3
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Improper authorization
CWE: CWE-285 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Yes
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 208068
Nessus Name: Ubuntu 16.04 LTS : GNOME Shell vulnerabilities (USN-7052-1)

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/03/2019 🔍
02/06/2019 +34 days 🔍
02/07/2019 +1 days 🔍
02/15/2019 +8 days 🔍
10/03/2024 +2057 days 🔍

Sourcesinfo

Advisory: USN-3966-1
Status: Not defined
Confirmation: 🔍

CVE: CVE-2019-3820 (🔍)
GCVE (CVE): GCVE-0-2019-3820
GCVE (VulDB): GCVE-100-130617

Entryinfo

Created: 02/07/2019 09:29
Updated: 10/03/2024 22:21
Changes: 02/07/2019 09:29 (56), 05/08/2020 21:09 (2), 07/06/2023 15:22 (3), 10/03/2024 22:21 (16)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.