Siemens EN100 Ethernet Module Web Interface access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.4$5k-$25k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Siemens EN100 Ethernet Module. This vulnerability affects unknown code of the component Web Interface. The manipulation leads to access control. This vulnerability is uniquely identified as CVE-2018-4838. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Siemens EN100 Ethernet Module (affected version unknown). It has been rated as critical. This issue affects an unknown functionality of the component Web Interface. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability has been identified in Siemens EN100 Ethernet module IEC 61850 variant (All versions < V4.30), EN100 Ethernet module PROFINET IO variant (All versions), EN100 Ethernet module Modbus TCP variant (All versions), EN100 Ethernet module DNP3 variant (All versions), EN100 Ethernet module IEC 104 variant (All versions). The web interface (TCP/80) of affected devices allows an unauthenticated user to upgrade or downgrade the firmware of the device, including to older versions with known vulnerabilities.

The bug was discovered 03/08/2018. The weakness was disclosed 03/08/2018 by Alex with Positive Technologies (Website). It is possible to read the advisory at cert-portal.siemens.com. The identification of this vulnerability is CVE-2018-4838 since 01/02/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 02/17/2023). The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

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 103379†). The entries VDB-114228 and VDB-114229 are pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/02/2018 🔍
03/08/2018 +65 days 🔍
03/08/2018 +0 days 🔍
03/08/2018 +0 days 🔍
03/08/2018 +0 days 🔍
03/09/2018 +1 days 🔍
02/17/2023 +1806 days 🔍

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-845879
Researcher: Alex
Organization: Positive Technologies
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-4838 (🔍)
GCVE (CVE): GCVE-0-2018-4838
GCVE (VulDB): GCVE-100-114227
SecurityFocus: 103379 - Multiple Siemens EN100 Ethernet Modules CVE-2018-4838 Authentication Bypass Vulnerability

See also: 🔍

Entryinfo

Created: 03/09/2018 07:59
Updated: 02/17/2023 14:31
Changes: 03/09/2018 07:59 (58), 01/11/2020 15:29 (6), 02/17/2023 14:31 (3)
Complete: 🔍
Cache ID: 216::103

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

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