D-Link DIR-816 A2 1.10 form2userconfig.cgi newpass memory corruption

Summaryinfo

A vulnerability was found in D-Link DIR-816 A2 1.10. It has been rated as critical. The impacted element is an unknown function of the file /goform/form2userconfig.cgi. The manipulation of the argument newpass as part of Long Password leads to memory corruption. This vulnerability is referenced as CVE-2018-20305. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in D-Link DIR-816 A2 1.10 (Router Operating System). This issue affects an unknown function of the file /goform/form2userconfig.cgi. The manipulation of the argument newpass as part of a Long Password leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

D-Link DIR-816 A2 1.10 B05 devices allow arbitrary remote code execution without authentication via the newpass parameter. In the /goform/form2userconfig.cgi handler function, a long password may lead to a stack-based buffer overflow and overwrite a return address.

The bug was discovered 12/20/2018. The weakness was published 12/20/2018 (Website). It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2018-20305 since 12/19/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 04/22/2020).

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

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Productinfo

Type

• Router Operating System

Vendor

• D-Link

Name

• DIR-816 A2

Version

• 1.10

License

• commercial

Website

• Vendor: https://www.dlink.com/

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CPE 2.2info

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