Siemens SIMATIC HMI Comfort Panel up to 16 Update 2 Telnet Service missing authentication

CVSS Meta Temp Score
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CTI Interest Score
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9.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Siemens SIMATIC HMI Comfort Panel and SIMATIC HMI KTP Mobile Panel up to 16 Update 2. It has been declared as critical. The affected element is an unknown function of the component Telnet Service. The manipulation results in missing authentication. This vulnerability is known as CVE-2020-15798. It is possible to launch the attack remotely. Furthermore, an exploit is available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability classified as critical has been found in Siemens SIMATIC HMI Comfort Panel and SIMATIC HMI KTP Mobile Panel up to 16 Update 2 (SCADA Software). Affected is some unknown processing of the component Telnet Service. The manipulation with an unknown input leads to a missing authentication vulnerability. CWE is classifying the issue as CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A vulnerability has been identified in SIMATIC HMI Comfort Panels (incl. SIPLUS variants) (All versions < V16 Update 3a), SIMATIC HMI KTP Mobile Panels (All versions < V16 Update 3a), SINAMICS GH150 (All versions), SINAMICS GL150 (with option X30) (All versions), SINAMICS GM150 (with option X30) (All versions), SINAMICS SH150 (All versions), SINAMICS SL150 (All versions), SINAMICS SM120 (All versions), SINAMICS SM150 (All versions), SINAMICS SM150i (All versions). Affected devices with enabled telnet service do not require authentication for this service. This could allow a remote attacker to gain full access to the device. (ZDI-CAN-12046)

The weakness was published 02/10/2021 as ssa-520004. The advisory is shared for download at cert-portal.siemens.com. This vulnerability is traded as CVE-2020-15798. Technical details are unknown but a public exploit is available.

The exploit is shared for download at cert-portal.siemens.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $5k-$25k.

Applying the patch 16 Update 3a is able to eliminate this problem.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.5

VulDB Base Score: 9.8
VulDB Temp Score: 8.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

ADP CISA Base Score: 9.8
ADP CISA 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: Missing authentication
CWE: CWE-306 / CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 16 Update 3a

Timelineinfo

07/15/2020 🔍
02/10/2021 +210 days 🔍
02/10/2021 +0 days 🔍
06/03/2026 +1939 days 🔍

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-520004
Status: Confirmed

CVE: CVE-2020-15798 (🔍)
GCVE (CVE): GCVE-0-2020-15798
GCVE (VulDB): GCVE-100-169560
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 02/10/2021 07:33
Updated: 06/03/2026 03:26
Changes: 02/10/2021 07:33 (43), 02/26/2021 15:16 (2), 02/26/2021 15:21 (16), 06/03/2026 03:26 (26)
Complete: 🔍
Cache ID: 216::103

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