Siemens SIMATIC Drive Controller Family Packet improper validation of syntactic correctness of input

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

A vulnerability, which was classified as problematic, has been found in Siemens SIMATIC Drive Controller Family, SIMATIC ET 200SP Open Controller CPU 1515SP PC2, SIMATIC S7-1200 CPU Family, SIMATIC S7-1500 CPU Family, SIMATIC S7-1500 Software Controller and SIMATIC S7-PLCSIM Advanced (SCADA Software). This issue affects some unknown functionality of the component Packet Handler. The manipulation with an unknown input leads to a improper validation of syntactic correctness of input vulnerability. Using CWE to declare the problem leads to CWE-1286. The product receives input that is expected to be well-formed - i.e., to comply with a certain syntax - but it does not validate or incorrectly validates that the input complies with the syntax. Impacted is availability. The summary by CVE is:

A vulnerability has been identified in SIMATIC Drive Controller family (All versions < V3.0.1), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions < V4.6.0), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions < V3.0.1), SIMATIC S7-1500 Software Controller (All versions), SIMATIC S7-PLCSIM Advanced (All versions < V5.0), SIPLUS TIM 1531 IRC (All versions), TIM 1531 IRC (All versions). Affected devices don't process correctly certain special crafted packets sent to port 102/tcp, which could allow an attacker to cause a denial-of-service in the device.

The weakness was published 12/13/2022 as ssa-382653. The advisory is shared at cert-portal.siemens.com. The identification of this vulnerability is CVE-2021-44695 since 12/07/2021. Neither technical details nor an exploit are publicly available.

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Productinfo

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Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

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

CVSSv2info

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

Exploitinginfo

Class: Improper validation of syntactic correctness of input
CWE: CWE-1286 / CWE-20
CAPEC: 🔍
ATT&CK: 🔍

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: 🔍

Timelineinfo

12/07/2021 🔍
12/13/2022 +371 days 🔍
12/13/2022 +0 days 🔍
12/13/2022 +0 days 🔍

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-382653
Status: Confirmed

CVE: CVE-2021-44695 (🔍)
GCVE (CVE): GCVE-0-2021-44695
GCVE (VulDB): GCVE-100-215525

Entryinfo

Created: 12/13/2022 07:41 PM
Changes: 12/13/2022 07:41 PM (40)
Complete: 🔍
Cache ID: 18:9BA:40

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