Vera VeraEdge/Veralite Web User Interface relay.sh eval remote_host command injection

Summaryinfo

A vulnerability classified as critical has been found in Vera VeraEdge and Veralite. This impacts the function eval of the file relay.sh of the component Web User Interface. The manipulation of the argument remote_host as part of Parameter leads to command injection. This vulnerability is documented as CVE-2017-9384. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Vera VeraEdge and Veralite (version now known). This issue affects the function eval of the file relay.sh of the component Web User Interface. The manipulation of the argument remote_host as part of a Parameter leads to a command injection vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered on Vera VeraEdge 1.7.19 and Veralite 1.7.481 devices. The device provides a web user interface that allows a user to manage the device. As a part of the functionality the device firmware file contains a file known as relay.sh which allows the device to create relay ports and connect the device to Vera servers. This is primarily used as a method of communication between the device and Vera servers so the devices can be communicated with even when the user is not at home. One of the parameters retrieved by this specific script is "remote_host". This parameter is not sanitized by the script correctly and is passed in a call to "eval" to execute another script where remote_host is concatenated to be passed a parameter to the second script. This allows an attacker to escape from the executed command and then execute any commands of his/her choice.

The weakness was released 06/17/2019 as not defined mailinglist post (Bugtraq). The advisory is shared at seclists.org. The identification of this vulnerability is CVE-2017-9384 since 06/02/2017. The exploitation is known to be easy. The attack may be initiated remotely. Required for exploitation is a simple authentication. Technical details are known, but no exploit is available. 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.

Entries connected to this vulnerability are available at VDB-136204, VDB-136205, VDB-136206 and VDB-136207. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• Vera

Name

• VeraEdge
• Veralite

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CPE 2.2info

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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