Siemens SIMATIC Step 7 up to 15.x Password Hash information disclosure

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.
4.9$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Siemens SIMATIC Step 7 up to 15.x. This vulnerability affects unknown code of the component Password Hash. This manipulation causes information disclosure. This vulnerability appears as CVE-2018-13811. The attack requires local access. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Siemens SIMATIC Step 7 up to 15.x (SCADA Software). It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component Password Hash. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. 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) (All Versions < V15.1). Password hashes with insufficient computational effort could allow an attacker to access to a project file and reconstruct passwords. The vulnerability could be exploited by an attacker with local access to the project file. No user interaction is required to exploit the vulnerability. The vulnerability could allow the attacker to obtain certain passwords from the project. At the time of advisory publication no public exploitation of this vulnerability was known.

The bug was discovered 11/13/2018. The weakness was presented 12/13/2018 (Website). The advisory is shared at cert-portal.siemens.com. This vulnerability is known as CVE-2018-13811 since 07/10/2018. The exploitation appears to be difficult. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 30 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 15.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 105926†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.9

VulDB Base Score: 4.5
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
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: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: SIMATIC Step 7 15.1

Timelineinfo

07/10/2018 🔍
11/13/2018 +126 days 🔍
11/13/2018 +0 days 🔍
12/13/2018 +30 days 🔍
12/13/2018 +0 days 🔍
12/14/2018 +1 days 🔍
06/18/2023 +1647 days 🔍

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-621493
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-13811 (🔍)
GCVE (CVE): GCVE-0-2018-13811
GCVE (VulDB): GCVE-100-127933
SecurityFocus: 105926 - Siemens SIMATIC STEP 7 TIA Portal CVE-2018-13811 Weak Password Security Vulnerability

Entryinfo

Created: 12/14/2018 07:38
Updated: 06/18/2023 17:14
Changes: 12/14/2018 07:38 (62), 04/20/2020 18:02 (4), 06/18/2023 17:14 (4)
Complete: 🔍
Cache ID: 216::103

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

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