D-Link DSR-500N up to 1.02 SSH/Telnet /etc/passwd hard-coded credentials

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.
8.0	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as critical has been found in D-Link DSR-500N up to 1.02. The affected element is an unknown function of the file /etc/passwd of the component SSH/Telnet. Such manipulation leads to hard-coded credentials. This vulnerability is uniquely identified as CVE-2021-39615. No exploit exists. Restrictive firewalling should be applied.

Detailsinfo

A vulnerability, which was classified as critical, has been found in D-Link DSR-500N up to 1.02 (Router Operating System). Affected by this issue is an unknown part of the file /etc/passwd of the component SSH/Telnet. The manipulation with an unknown input leads to a hard-coded credentials vulnerability. Using CWE to declare the problem leads to CWE-798. The product contains hard-coded credentials, such as a password or cryptographic key, which it uses for its own inbound authentication, outbound communication to external components, or encryption of internal data. Impacted is confidentiality, integrity, and availability.

The weakness was disclosed 08/24/2021 as SAP10235. The advisory is shared for download at nussko.com. This vulnerability is handled as CVE-2021-39615. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/04/2024). The MITRE ATT&CK project declares the attack technique as T1110.001.

Addressing this vulnerability is possible by firewalling .

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

Productinfo

Type

Router Operating System

Vendor

D-Link

Name

DSR-500N

Version

1.02

License

commercial

Support

end of life

Website

Vendor: https://www.dlink.com/

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 8.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.2
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: Hard-coded credentials
CWE: CWE-798 / CWE-259 / 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: Firewall
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/23/2021 🔍
08/24/2021 +1 days 🔍
08/24/2021 +0 days 🔍
08/04/2024 +1076 days 🔍

Sourcesinfo

Vendor: dlink.com

Advisory: SAP10235
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-39615 (🔍)
GCVE (CVE): GCVE-0-2021-39615
GCVE (VulDB): GCVE-100-181352

Entryinfo

Created: 08/24/2021 07:41
Updated: 08/04/2024 07:03
Changes: 08/24/2021 07:41 (41), 08/26/2021 12:54 (2), 08/04/2024 07:03 (34)
Complete: 🔍
Cache ID: 216::103