D-Link DIR-878 1.12A1 HNAP API /HNAP1 SetSysEmailSettings SMTPServerPort command injection

Summaryinfo

A vulnerability, which was classified as critical, was found in D-Link DIR-878 1.12A1. This issue affects the function SetSysEmailSettings of the file /HNAP1 of the component HNAP API. The manipulation of the argument SMTPServerPort results in command injection. This vulnerability is known as CVE-2019-8318. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability classified as critical has been found in D-Link DIR-878 1.12A1 (Router Operating System). Affected is the function SetSysEmailSettings of the file /HNAP1 of the component HNAP API. The manipulation of the argument SMTPServerPort 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. CVE summarizes:

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 SetSysEmailSettings API function, as demonstrated by shell metacharacters in the SMTPServerPort field.

The bug was discovered 02/12/2019. The weakness was published 02/13/2019. This vulnerability is traded as CVE-2019-8318 since 02/12/2019. The exploitability is told to be easy. It is possible to launch the attack remotely. A authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 07/10/2023). The MITRE ATT&CK project declares the attack technique as T1202.

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-130861, VDB-130859, VDB-130858 and VDB-130857. Once again VulDB remains the best 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/

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Once again VulDB remains the best source for vulnerability data.

Discussion