Siemens SIMATIC STEP 7/WinCC TIA Portal Permission access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.9$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Siemens SIMATIC STEP 7 and WinCC. This vulnerability affects unknown code of the component TIA Portal. Such manipulation leads to access control (Permission). This vulnerability is listed as CVE-2018-11454. The attack must be carried out locally. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Siemens SIMATIC STEP 7 and WinCC (SCADA Software) (unknown version). Affected by this issue is an unknown code block of the component TIA Portal. The manipulation with an unknown input leads to a access control vulnerability (Permission). Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability. CVE summarizes:

A vulnerability has been identified in SIMATIC STEP 7 (TIA Portal) and WinCC (TIA Portal) V10, V11, V12 (All versions), SIMATIC STEP 7 (TIA Portal) and WinCC (TIA Portal) V13 (All versions), SIMATIC STEP 7 (TIA Portal) and WinCC (TIA Portal) V14 (All versions < V14 SP1 Update 6), SIMATIC STEP 7 (TIA Portal) and WinCC (TIA Portal) V15 (All versions < V15 Update 2). Improper file permissions in the default installation of TIA Portal may allow an attacker with local file system access to manipulate resources which may be transferred to devices and executed there by a different user. No special privileges are required, but the victim needs to transfer the manipulated files to a device. Execution is caused on the target device rather than on the PG device.

The bug was discovered 08/07/2018. The weakness was presented 08/07/2018 (Website). The advisory is shared for download at cert-portal.siemens.com. This vulnerability is handled as CVE-2018-11454 since 05/25/2018. The attack needs to be approached locally. The requirement for exploitation is a simple authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 05/01/2023). The MITRE ATT&CK project declares the attack technique as T1068.

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 105115†). See VDB-122707 for similar entry. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.9

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

NVD Base Score: 8.6
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

Name: Permission
Class: Access control / Permission
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

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

05/25/2018 🔍
08/07/2018 +74 days 🔍
08/07/2018 +0 days 🔍
08/07/2018 +0 days 🔍
08/08/2018 +1 days 🔍
08/14/2018 +6 days 🔍
05/01/2023 +1721 days 🔍

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-979106
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-11454 (🔍)
GCVE (CVE): GCVE-0-2018-11454
GCVE (VulDB): GCVE-100-122708
SecurityFocus: 105115 - Siemens SIMATIC STEP 7 and SIMATIC WinCC Multiple Insecure File Permissions Vulnerabilities

See also: 🔍

Entryinfo

Created: 08/08/2018 07:58
Updated: 05/01/2023 09:23
Changes: 08/08/2018 07:58 (59), 03/14/2020 07:00 (4), 05/01/2023 09:23 (3)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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