VDB-152896 · CVE-2018-21065 · GCVE-0-2018-21065

Samsung Mobile Devices M(6.0)/N(7.x)/O(8.x) eCryptFS integer underflow

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.
8.2	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Samsung Mobile Devices M(6.0)/N(7.x)/O(8.x). The impacted element is an unknown function of the component eCryptFS. Executing a manipulation can lead to integer underflow. This vulnerability is handled as CVE-2018-21065. The attack can be executed remotely. There is not any exploit available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability has been found in Samsung Mobile Devices M(6.0)/N(7.x)/O(8.x) (Smartphone Operating System) and classified as critical. This vulnerability affects some unknown functionality of the component eCryptFS. The manipulation with an unknown input leads to a integer underflow vulnerability. The CWE definition for the vulnerability is CWE-191. The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered on Samsung mobile devices with M(6.0), N(7.x), and O(8.x) software. There is an integer underflow in eCryptFS because of a missing size check. The Samsung ID is SVE-2017-11855 (August 2018).

The weakness was released 04/08/2020 (Website). The advisory is shared for download at security.samsungmobile.com. This vulnerability was named CVE-2018-21065 since 04/07/2020. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

Applying a patch is able to eliminate this problem.

Entries connected to this vulnerability are available at VDB-111342, VDB-111380, VDB-115287 and VDB-115285. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Smartphone Operating System

Vendor

Samsung

Name

Mobile Devices

Version

License

commercial

Website

Vendor: https://www.samsung.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Integer underflow
CWE: CWE-191 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/07/2020 🔍
04/08/2020 +1 days 🔍
04/09/2020 +1 days 🔍
10/07/2020 +181 days 🔍

Sourcesinfo

Vendor: samsung.com

Advisory: security.samsungmobile.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-21065 (🔍)
GCVE (CVE): GCVE-0-2018-21065
GCVE (VulDB): GCVE-100-152896
See also: 🔍

Entryinfo

Created: 04/09/2020 09:02
Updated: 10/07/2020 18:19
Changes: 04/09/2020 09:02 (39), 04/09/2020 09:07 (18), 10/07/2020 18:19 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.