Blipcare BP700 10.1 Wireless Network HTTP Request resource management

Summaryinfo

A vulnerability classified as critical has been found in Blipcare BP700 10.1. Affected by this issue is some unknown functionality of the component Wireless Network. The manipulation as part of HTTP Request leads to resource management. This vulnerability is documented as CVE-2017-11580. The attack requires being on the local network. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Blipcare BP700 10.1. This issue affects some unknown processing of the component Wireless Network. The manipulation as part of a HTTP Request leads to a resource management vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Blipcare Wifi blood pressure monitor BP700 10.1 devices allow memory corruption that results in Denial of Service. When connected to the "Blip" open wireless connection provided by the device, if a large string is sent as a part of the HTTP request in any part of the HTTP headers, the device could become completely unresponsive. Presumably this happens as the memory footprint provided to this device is very small. According to the specs from Rezolt, the Wi-Fi module only has 256k of memory. As a result, an incorrect string copy operation using either memcpy, strcpy, or any of their other variants could result in filling up the memory space allocated to the function executing and this would result in memory corruption. To test the theory, one can modify the demo application provided by the Cypress WICED SDK and introduce an incorrect "memcpy" operation and use the compiled application on the evaluation board provided by Cypress semiconductors with exactly the same Wi-Fi SOC. The results were identical where the device would completely stop responding to any of the ping or web requests.

The weakness was released 07/02/2019 as not defined mailinglist post (Bugtraq). It is possible to read the advisory at seclists.org. The identification of this vulnerability is CVE-2017-11580 since 07/23/2017. Access to the local network is required for this attack to succeed. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

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. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• Blipcare

Name

• BP700

Version

• 10.1

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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