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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6.5$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Siemens SIMATIC STEP 7 and WinCC. This affects an unknown part of the component TIA Portal. This manipulation causes access control (Permission). This vulnerability is tracked as CVE-2018-11453. The attack is restricted to local execution. No exploit exists.

Detailsinfo

A vulnerability classified as critical was found in Siemens SIMATIC STEP 7 and WinCC (SCADA Software) (the affected version is unknown). Affected by this vulnerability is an unknown code of the component TIA Portal. The manipulation with an unknown input leads to a access control vulnerability (Permission). The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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 insert specially crafted files which may prevent TIA Portal startup (Denial-of-Service) or lead to local code execution. No special privileges are required, but the victim needs to attempt to start TIA Portal after the manipulation.

The bug was discovered 08/07/2018. The weakness was disclosed 08/07/2018 (Website). It is possible to read the advisory at cert-portal.siemens.com. This vulnerability is known as CVE-2018-11453 since 05/25/2018. Attacking locally is a requirement. A single authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/01/2023). 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 105115†). The entry VDB-122708 is pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
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

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: No

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-2018-11453 (🔍)
GCVE (CVE): GCVE-0-2018-11453
GCVE (VulDB): GCVE-100-122707
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 09:19
Changes: 08/08/2018 07:58 (59), 03/14/2020 06:50 (4), 05/01/2023 09:19 (3)
Complete: 🔍
Cache ID: 216::103

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

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