TRENDnet TEW-673GRU up to 1.00b40 apply.cgi start_arpping dhcpd_start/dhcpd_end/lan_ipaddr os command injection

Summaryinfo

A vulnerability marked as critical has been reported in TRENDnet TEW-673GRU up to 1.00b40. This affects the function start_arpping of the file apply.cgi. This manipulation of the argument dhcpd_start/dhcpd_end/lan_ipaddr as part of POST Request causes os command injection. This vulnerability is handled as CVE-2018-19239. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical was found in TRENDnet TEW-673GRU up to 1.00b40. Affected by this vulnerability is the function start_arpping of the file apply.cgi. The manipulation of the argument dhcpd_start/dhcpd_end/lan_ipaddr as part of a POST Request leads to a os command injection vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

TRENDnet TEW-673GRU v1.00b40 devices have an OS command injection vulnerability in the start_arpping function of the timer binary, which allows remote attackers to execute arbitrary commands via three parameters (dhcpd_start, dhcpd_end, and lan_ipaddr) passed to the apply.cgi binary through a POST request.

The bug was discovered 12/07/2018. The weakness was released 12/20/2018 as not defined mailinglist post (Full-Disclosure). It is possible to read the advisory at seclists.org. This vulnerability is known as CVE-2018-19239 since 11/13/2018. 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 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 13 days. During that time the estimated underground price was around $0-$5k.

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

Entries connected to this vulnerability are available at VDB-128252, VDB-128253 and VDB-128254. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• TRENDnet

Name

• TEW-673GRU

Version

• 1.00b40

License

• commercial

CPE 2.3info

• 🔍

CPE 2.2info

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