D-Link DSL 2730-U/DIR-600M DNS Resolver DNS Response privileges management

Summaryinfo

A vulnerability categorized as critical has been discovered in D-Link DSL 2730-U and DIR-600M. Affected is an unknown function of the component DNS Resolver. The manipulation as part of DNS Response results in privileges management. This vulnerability is identified as CVE-2020-13960. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical has been found in D-Link DSL 2730-U and DIR-600M (Router Operating System) (affected version unknown). Affected is an unknown functionality of the component DNS Resolver. The manipulation as part of a DNS Response leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

D-Link DSL 2730-U IN_1.10 and IN_1.11 and DIR-600M 3.04 devices have the domain.name string in the DNS resolver search path by default, which allows remote attackers to provide valid DNS responses (and also offer Internet services such as HTTP) for names that otherwise would have had an NXDOMAIN error, by registering a subdomain of the domain.name domain name.

The weakness was released 06/08/2020. This vulnerability is traded as CVE-2020-13960 since 06/08/2020. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 06/09/2020). The MITRE ATT&CK project declares the attack technique as T1068.

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

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• D-Link

Name

• DIR-600M
• DSL 2730-U

License

• commercial

Website

• Vendor: https://www.dlink.com/

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