Vera VeraEdge/Veralite UPnP Service /port_3480 REQ_Image request_image memory corruption

Summaryinfo

A vulnerability was found in Vera VeraEdge and Veralite. It has been declared as critical. Impacted is the function LU::Generic_IP_Camera_Manager::REQ_Image of the file /port_3480 of the component UPnP Service. The manipulation of the argument request_image as part of Query String results in memory corruption. This vulnerability was named CVE-2017-9391. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability classified as critical has been found in Vera VeraEdge and Veralite (version now known). Affected is the function LU::Generic_IP_Camera_Manager::REQ_Image of the file /port_3480 of the component UPnP Service. The manipulation of the argument request_image as part of a Query String leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered on Vera VeraEdge 1.7.19 and Veralite 1.7.481 devices. The device provides UPnP services that are available on port 3480 and can also be accessed via port 80 using the url "/port_3480". It seems that the UPnP services provide "request_image" as one of the service actions for a normal user to retrieve an image from a camera that is controlled by the controller. It seems that the "URL" parameter passed in the query string is not sanitized and is stored on the stack which allows an attacker to overflow the buffer. The function "LU::Generic_IP_Camera_Manager::REQ_Image" is activated when the lu_request_image is passed as the "id" parameter in query string. This function then calls "LU::Generic_IP_Camera_Manager::GetUrlFromArguments" and passes a "pointer" to the function where it will be allowed to store the value from the URL parameter. This pointer is passed as the second parameter $a2 to the function "LU::Generic_IP_Camera_Manager::GetUrlFromArguments". However, neither the callee or the caller in this case performs a simple length check and as a result an attacker who is able to send more than 1336 characters can easily overflow the values stored on the stack including the $RA value and thus execute code on the device.

The weakness was presented 06/17/2019 as not defined mailinglist post (Bugtraq). The advisory is shared for download at seclists.org. This vulnerability is traded as CVE-2017-9391 since 06/02/2017. It is possible to launch the attack remotely. Required for exploitation is a authentication. There are known technical details, but no exploit is available.

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

See VDB-136204, VDB-136205, VDB-136206 and VDB-136207 for similar entries. Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Vera

Name

• VeraEdge
• Veralite

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Once again VulDB remains the best source for vulnerability data.

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