#VU48957 Time-of-check Time-of-use (TOCTOU) Race Condition in Smart Model 25000 Patient Reader - CVE-2020-27252

Vulnerability identifier: #VU48957

Vulnerability risk: Medium

CVSSv4.0: 5.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-27252

CWE-ID: CWE-367

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Smart Model 25000 Patient Reader
Mobile applications / Apps for mobile phones

Vendor: Medtronic

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a race condition in the MCL Smart Patient Reader software update system. A remote attacker on the local network can upload and execute unsigned firmware and execute arbitrary code on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Smart Model 25000 Patient Reader: before 5.2

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External links
https://ics-cert.us-cert.gov/advisories/icsma-20-345-01

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.