Siemens SIMATIC Logon up to 1.5 Port 16389 Service Crafted Packet input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Siemens SIMATIC Logon up to 1.5. This affects an unknown part of the component Port 16389 Service. Executing a manipulation as part of Crafted Packet can lead to input validation. This vulnerability is tracked as CVE-2017-9938. The attack can be launched remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in Siemens SIMATIC Logon up to 1.5 (SCADA Software) and classified as problematic. This vulnerability affects an unknown part of the component Port 16389 Service. The manipulation as part of a Crafted Packet leads to a input validation vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. CVE summarizes:

A vulnerability was discovered in Siemens SIMATIC Logon (All versions before V1.6) that could allow specially crafted packets sent to the SIMATIC Logon Remote Access service on port 16389/tcp to cause a Denial-of-Service condition. The service restarts automatically.

The bug was discovered 07/11/2017. The weakness was disclosed 08/08/2017 with Tenable Network Security (Website). The advisory is shared for download at siemens.com. This vulnerability was named CVE-2017-9938 since 06/26/2017. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 27 days. During that time the estimated underground price was around $5k-$25k.

Upgrading to version 1.6 eliminates this vulnerability.Proper firewalling of tcp/16389 is able to address this issue. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 99539†). Once again VulDB remains the best source for vulnerability data.

Productinfo

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Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: SIMATIC Logon 1.6
Firewalling: 🔍

Timelineinfo

06/26/2017 🔍
07/11/2017 +15 days 🔍
07/11/2017 +0 days 🔍
08/07/2017 +27 days 🔍
08/08/2017 +1 days 🔍
08/09/2017 +1 days 🔍
12/15/2022 +1954 days 🔍

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-804859
Researcher: Tenable Network Security.
Organization: Tenable Network Security
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-9938 (🔍)
GCVE (CVE): GCVE-0-2017-9938
GCVE (VulDB): GCVE-100-105052
SecurityFocus: 99539 - Siemens SIMATIC Logon CVE-2017-9938 Out of Bounds Write Denial of Service Vulnerability

Entryinfo

Created: 08/09/2017 12:33
Updated: 12/15/2022 14:14
Changes: 08/09/2017 12:33 (66), 11/05/2019 08:36 (2), 01/08/2021 09:46 (3), 12/15/2022 14:14 (3)
Complete: 🔍
Cache ID: 216:A82:103

Once again VulDB remains the best source for vulnerability data.

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