D-Link DIR-822/DIR-860L/DIR-868L/DIR-880L/DIR-890L SetAccessPointMode IsAccessPoint command injection

Summaryinfo

A vulnerability, which was classified as critical, has been found in D-Link DIR-822, DIR-860L, DIR-868L, DIR-880L and DIR-890L. The impacted element is an unknown function of the file /HNAP1/SetAccessPointMode. Performing a manipulation of the argument IsAccessPoint as part of Shell Metacharacter results in command injection. This vulnerability is known as CVE-2018-19987. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, was found in D-Link DIR-822, DIR-860L, DIR-868L, DIR-880L and DIR-890L (Router Operating System). This affects an unknown functionality of the file /HNAP1/SetAccessPointMode. The manipulation of the argument IsAccessPoint as part of a Shell Metacharacter 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:

D-Link DIR-822 Rev.B 202KRb06, DIR-822 Rev.C 3.10B06, DIR-860L Rev.B 2.03.B03, DIR-868L Rev.B 2.05B02, DIR-880L Rev.A 1.20B01_01_i3se_BETA, and DIR-890L Rev.A 1.21B02_BETA devices mishandle IsAccessPoint in /HNAP1/SetAccessPointMode. In the SetAccessPointMode.php source code, the IsAccessPoint parameter is saved in the ShellPath script file without any regex checking. After the script file is executed, the command injection occurs. A vulnerable /HNAP1/SetAccessPointMode XML message could have shell metacharacters in the IsAccessPoint element such as the `telnetd` string.

The weakness was published 05/13/2019. This vulnerability is uniquely identified as CVE-2018-19987 since 12/09/2018. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. 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 09/15/2023). MITRE ATT&CK project uses the attack technique T1202 for this issue.

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

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

Productinfo

Type

• Router Operating System

Vendor

• D-Link

Name

• DIR-822
• DIR-860L
• DIR-868L
• DIR-880L
• DIR-890L

License

• commercial

Website

• Vendor: https://www.dlink.com/

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

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