D-Link DIR-878 1.12A1 HNAP API /HNAP1 SetIPv4FirewallSettings SrcIPv4AddressRangeStart command injection

Summaryinfo

A vulnerability classified as critical has been found in D-Link DIR-878 1.12A1. Affected by this issue is the function SetIPv4FirewallSettings of the file /HNAP1 of the component HNAP API. Performing a manipulation of the argument SrcIPv4AddressRangeStart results in command injection. This vulnerability is reported as CVE-2019-8315. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in D-Link DIR-878 1.12A1 (Router Operating System). It has been classified as critical. This affects the function SetIPv4FirewallSettings of the file /HNAP1 of the component HNAP API. The manipulation of the argument SrcIPv4AddressRangeStart with an unknown input leads to a command injection vulnerability. CWE is classifying the issue as 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. This is going to have an impact on 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 SetIPv4FirewallSettings API function, as demonstrated by shell metacharacters in the SrcIPv4AddressRangeStart field.

The bug was discovered 02/12/2019. The weakness was disclosed 02/13/2019. This vulnerability is uniquely identified as CVE-2019-8315 since 02/12/2019. The exploitability is told to be easy. It is possible to initiate the attack remotely. Required for exploitation is a authentication. Technical details are known, but no exploit is available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 07/10/2023). MITRE ATT&CK project uses the attack technique T1202 for this issue.

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.

The entries VDB-130861, VDB-130860, VDB-130859 and VDB-130858 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best 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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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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