VDB-128343 · CVE-2018-20398 · GCVE-0-2018-20398

Skyworth CM5100.g2 SNMP Request Credentials credentials management

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.
7.5	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Skyworth CM5100, CM5100-440, CM5100-511, CM5100-GHD00 and CM5100.g2. It has been classified as problematic. The affected element is an unknown function. Performing a manipulation as part of SNMP Request results in credentials management (Credentials). This vulnerability was named CVE-2018-20398. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Skyworth CM5100, CM5100-440, CM5100-511, CM5100-GHD00 and CM5100.g2. This affects an unknown code block. The manipulation as part of a SNMP Request leads to a credentials management vulnerability (Credentials). CWE is classifying the issue as CWE-255. This is going to have an impact on confidentiality. The summary by CVE is:

Skyworth CM5100 V1.1.0, CM5100-440 V1.2.1, CM5100-511 4.1.0.14, CM5100-GHD00 V1.2.2, and CM5100.g2 4.1.0.17 devices allow remote attackers to discover credentials via iso.3.6.1.4.1.4491.2.4.1.1.6.1.1.0 and iso.3.6.1.4.1.4491.2.4.1.1.6.1.2.0 SNMP requests.

The bug was discovered 12/22/2018. The weakness was presented 12/23/2018 (Website). It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2018-20398 since 12/23/2018. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1552 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k.

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

See VDB-128325, VDB-128326, VDB-128327 and VDB-128328 for similar entries. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Skyworth

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.6

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
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

Name: Credentials
Class: Credentials management / Credentials
CWE: CWE-255
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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/22/2018 🔍
12/23/2018 +1 days 🔍
12/23/2018 +0 days 🔍
12/23/2018 +0 days 🔍
12/24/2018 +1 days 🔍
04/23/2020 +486 days 🔍

Sourcesinfo

Advisory: github.com
Status: Not defined

CVE: CVE-2018-20398 (🔍)
GCVE (CVE): GCVE-0-2018-20398
GCVE (VulDB): GCVE-100-128343
See also: 🔍

Entryinfo

Created: 12/24/2018 09:25
Updated: 04/23/2020 17:26
Changes: 12/24/2018 09:25 (58), 04/23/2020 17:26 (1)
Complete: 🔍
Cache ID: 216::103