Philips Mitigation Plan for e-Alert Unit

Thursday, August 30, 2018 @ 03:08 PM gHale

Philips released one update that handles some vulnerabilities and will release another to take of other ones in its e-Alert Unit (non-medical device), according to a report with NCCIC.

The vulnerabilities are an improper input validation, cross-site scripting, information exposure, incorrect default permissions, cleartext transmission of sensitive information, cross-site request forgery, session fixation, resource exhaustion, and use of hard-coded credentials.

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Successful exploitation from an attacker within the same subnet may impact or compromise user contact details, unit integrity, and/or unit availability. The vulnerabilities, which Philips self-reported, may allow attackers to provide unexpected input into the application, execute arbitrary code, display unit information, or potentially cause e-Alert to crash.

Version R2.1 and prior suffer from the remotely exploitable vulnerabilities.

In one vulnerability, the software does not validate input properly, allowing an attacker to craft the input in a form that is not expected by the rest of the application. This would lead to parts of the unit receiving unintended input, which may result in altered control flow, arbitrary control of a resource, or arbitrary code execution.

CVE-2018-8850 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 7.1.

In addition, the software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is then served to other users.

CVE-2018-8846 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 7.1.

Also, the Philips e-Alert contains a banner disclosure vulnerability that could allow attackers to obtain extraneous product information, such as OS and software components, via the HTTP response header that is normally not available to the attacker, but might be useful information in an attack.

CVE-2018-14803 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 5.3.

In addition, the software, upon installation, sets incorrect permissions for an object that exposes it to an unintended actor.

CVE-2018-8848 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 7.1.

Also, the software transmits sensitive or security-critical data in cleartext in a communication channel that can be sniffed by unauthorized actors. The Philips e-Alert communication channel is not encrypted which could therefore lead to disclosure of personal contact information and application login credentials from within the same subnet.

CVE-2018-8842 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 7.5.

In addition, the web application does not, or cannot, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.

CVE-2018-8844 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 6.8.

When authenticating a user or otherwise establishing a new user session, the software gives an attacker the opportunity to steal authenticated sessions without invalidating any existing session identifier.

CVE-2018-8852 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 6.4.

In another vulnerability, the software does not properly restrict the size or amount of resources requested or influenced by an actor, which can be used to consume more resources than intended.

CVE-2018-8854 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 7.5.

In addition, the software contains hard-coded cryptographic key, which it uses for encryption of internal data.

CVE-2018-8856 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 9.8.

The product sees use mainly in the healthcare and public health sectors. It also sees action on a global basis.

No known public exploits specifically target these vulnerabilities. However, an attacker with low skill level could leverage the vulnerability.

In June of 2018, Netherlands-based Philips released Version R2.1 to remediate CWE-319, CWE-20, CWE-798, and CWE-384.  Philips has another product software update planned for the end of 2018 that addresses CWE-400, CWE-79, CWE-276, CWE-200, and CWE-352.

Philips will communicate service options to all affected install-base users.

Please see the Philips product security website for the latest public security information on this matter and for other Philips products.

As an immediate mitigation to the vulnerabilities on the LAN until the update can be applied, Philips recommends users:
• Ensure network security best practices are implemented
• Limit network access to e-Alert in accordance with product documentation

Users with questions regarding their specific e-Alert installations should contact their local Philips service support team or their regional e-Alert service support.



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