D-Link DSL-2540U/DSL-2640U 1.00 diag_ping.cmd ipaddr os command injection

Summaryinfo

A vulnerability was found in D-Link DSL-2540U and DSL-2640U 1.00 and classified as critical. Affected is an unknown function of the file diag_ping.cmd. Such manipulation of the argument ipaddr as part of HTTP GET Request leads to os command injection. This vulnerability is documented as CVE-2018-5371. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in D-Link DSL-2540U and DSL-2640U 1.00. Affected by this issue is an unknown code of the file diag_ping.cmd. The manipulation of the argument ipaddr as part of a HTTP GET Request leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. CVE summarizes:

diag_ping.cmd on D-Link DSL-2640U devices with firmware IM_1.00 and ME_1.00, and DSL-2540U devices with firmware ME_1.00, allows authenticated remote attackers to execute arbitrary OS commands via shell metacharacters in the ipaddr field of an HTTP GET request.

The bug was discovered 01/12/2018. The weakness was released 01/12/2018 (Website). The advisory is shared for download at iplantom.com. This vulnerability is handled as CVE-2018-5371 since 01/12/2018. The attack may be launched remotely. A simple authentication is needed 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 12/23/2019). The MITRE ATT&CK project declares the attack technique as T1202.

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

Vendor

• D-Link

Name

• DSL-2540U
• DSL-2640U

Version

• 1.00

License

• commercial

Website

• Vendor: https://www.dlink.com/

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