Dasan H665 1.46p1-0028 Telnet Service /bin/login 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.
8.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Dasan H665 1.46p1-0028 and classified as critical. Affected by this issue is some unknown functionality of the file /bin/login of the component Telnet Service. Executing a manipulation with the input dnsekakf2$$ can lead to credentials management. The identification of this vulnerability is CVE-2019-8950. The attack may be launched remotely. There is no exploit available. The application of restrictive firewalling is recommended.

Detailsinfo

A vulnerability has been found in Dasan H665 1.46p1-0028 and classified as critical. This vulnerability affects an unknown code of the file /bin/login of the component Telnet Service. The manipulation with the input value dnsekakf2$$ leads to a credentials management vulnerability. The CWE definition for the vulnerability is CWE-255. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The backdoor account dnsekakf2$$ in /bin/login on DASAN H665 devices with firmware 1.46p1-0028 allows an attacker to login to the admin account via TELNET.

The bug was discovered 02/17/2019. The weakness was shared 02/20/2019. This vulnerability was named CVE-2019-8950 since 02/19/2019. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1552.

The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $0-$5k.

Proper firewalling of is able to address this issue.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

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: 7.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
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: Credentials management
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: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Firewall
Status: 🔍

0-Day Time: 🔍

Timelineinfo

02/17/2019 🔍
02/19/2019 +2 days 🔍
02/20/2019 +1 days 🔍
02/20/2019 +0 days 🔍
07/11/2023 +1602 days 🔍

Sourcesinfo

Advisory: blog.burghardt.pl
Status: Not defined

CVE: CVE-2019-8950 (🔍)
GCVE (CVE): GCVE-0-2019-8950
GCVE (VulDB): GCVE-100-131044

Entryinfo

Created: 02/20/2019 10:33
Updated: 07/11/2023 14:52
Changes: 02/20/2019 10:33 (57), 05/11/2020 16:30 (1), 07/11/2023 14:52 (4)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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