VDB-112653 · CVE-2018-5441 · BID 102907

Phoenix Contact mGuard up to 8.6.0 Integrity Check Firmware input validation

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.
6.5	$0-$5k	0.00

Summaryinfo

A vulnerability identified as critical has been detected in Phoenix Contact mGuard up to 8.6.0. This affects an unknown part of the component Integrity Check. Performing a manipulation results in input validation (Firmware). This vulnerability was named CVE-2018-5441. The attack needs to be approached locally. There is no available exploit.

Detailsinfo

A vulnerability classified as critical has been found in Phoenix Contact mGuard up to 8.6.0. This affects some unknown functionality of the component Integrity Check. The manipulation with an unknown input leads to a input validation vulnerability (Firmware). CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

An Improper Validation of Integrity Check Value issue was discovered in PHOENIX CONTACT mGuard firmware versions 7.2 to 8.6.0. mGuard devices rely on internal checksums for verification of the internal integrity of the update packages. Verification may not always be performed correctly, allowing an attacker to modify firmware update packages.

The bug was discovered 01/30/2018. The weakness was presented 01/30/2018 (Website). The advisory is shared at ics-cert.us-cert.gov. This vulnerability is uniquely identified as CVE-2018-5441 since 01/12/2018. The exploitability is told to be easy. An attack has to be approached locally. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

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

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 102907†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Phoenix Contact

Name

mGuard

Version

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: Firmware
Class: Input validation / Firmware
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/12/2018 🔍
01/30/2018 +18 days 🔍
01/30/2018 +0 days 🔍
01/30/2018 +0 days 🔍
01/30/2018 +0 days 🔍
01/31/2018 +1 days 🔍
12/31/2019 +699 days 🔍

Sourcesinfo

Advisory: ics-cert.us-cert.gov
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-5441 (🔍)
GCVE (CVE): GCVE-0-2018-5441
GCVE (VulDB): GCVE-100-112653
SecurityFocus: 102907 - Phoenix Contact mGuard CVE-2018-5441 Local Security Bypass Vulnerability

Entryinfo

Created: 01/31/2018 09:03
Updated: 12/31/2019 14:01
Changes: 01/31/2018 09:03 (58), 12/31/2019 14:01 (4)
Complete: 🔍
Cache ID: 216:36B:103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.