D-Link DIR-878 1.12A1 HNAP API /HNAP1 SetIPv6FirewallSettings SrcIPv6AddressRangeStart command injection

Summaryinfo

A vulnerability marked as critical has been reported in D-Link DIR-878 1.12A1. Affected is the function SetIPv6FirewallSettings of the file /HNAP1 of the component HNAP API. This manipulation of the argument SrcIPv6AddressRangeStart causes command injection. This vulnerability is registered as CVE-2019-8313. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability has been found in D-Link DIR-878 1.12A1 (Router Operating System) and classified as critical. Affected by this vulnerability is the function SetIPv6FirewallSettings of the file /HNAP1 of the component HNAP API. The manipulation of the argument SrcIPv6AddressRangeStart with an unknown input leads to a command injection vulnerability. The CWE definition for the vulnerability is CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered on D-Link DIR-878 devices with firmware 1.12A1. This issue is a Command Injection allowing a remote attacker to execute arbitrary code, and get a root shell. A command Injection vulnerability allows attackers to execute arbitrary OS commands via a crafted /HNAP1 POST request. This occurs when any HNAP API function triggers a call to the twsystem function with untrusted input from the request body for the SetIPv6FirewallSettings API function, as demonstrated by shell metacharacters in the SrcIPv6AddressRangeStart field.

The bug was discovered 02/12/2019. The weakness was published 02/13/2019. This vulnerability is known as CVE-2019-8313 since 02/12/2019. The exploitation appears to be easy. The attack can be launched remotely. A single authentication is needed for 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 07/10/2023). The attack technique deployed by this issue is T1202 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 $5k-$25k.

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

Similar entries are available at VDB-130859, VDB-130858, VDB-130857 and VDB-130856. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• D-Link

Name

• DIR-878

Version

• 1.12A1

License

• commercial

Website

• Vendor: https://www.dlink.com/

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