Siemens SIMATIC S7-200 SMART CPU ST60 TCP Packet resource consumption

CVSS Meta Temp Score
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CTI Interest Score
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7.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Siemens SIMATIC S7-200 SMART CPU CR40, SIMATIC S7-200 SMART CPU CR60, SIMATIC S7-200 SMART CPU SR20, SIMATIC S7-200 SMART CPU SR30, SIMATIC S7-200 SMART CPU SR40, SIMATIC S7-200 SMART CPU SR60, SIMATIC S7-200 SMART CPU ST20, SIMATIC S7-200 SMART CPU ST30, SIMATIC S7-200 SMART CPU ST40 and SIMATIC S7-200 SMART CPU ST60. It has been declared as problematic. This issue affects some unknown processing of the component TCP Packet Handler. Executing a manipulation can lead to resource consumption. This vulnerability is registered as CVE-2024-43647. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability classified as critical was found in Siemens SIMATIC S7-200 SMART CPU CR40, SIMATIC S7-200 SMART CPU CR60, SIMATIC S7-200 SMART CPU SR20, SIMATIC S7-200 SMART CPU SR30, SIMATIC S7-200 SMART CPU SR40, SIMATIC S7-200 SMART CPU SR60, SIMATIC S7-200 SMART CPU ST20, SIMATIC S7-200 SMART CPU ST30, SIMATIC S7-200 SMART CPU ST40 and SIMATIC S7-200 SMART CPU ST60. This vulnerability affects some unknown processing of the component TCP Packet Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. CVE summarizes:

A vulnerability has been identified in SIMATIC S7-200 SMART CPU CR40 (6ES7288-1CR40-0AA0) (All versions), SIMATIC S7-200 SMART CPU CR60 (6ES7288-1CR60-0AA0) (All versions), SIMATIC S7-200 SMART CPU SR20 (6ES7288-1SR20-0AA0) (All versions), SIMATIC S7-200 SMART CPU SR20 (6ES7288-1SR20-0AA1) (All versions), SIMATIC S7-200 SMART CPU SR30 (6ES7288-1SR30-0AA0) (All versions), SIMATIC S7-200 SMART CPU SR30 (6ES7288-1SR30-0AA1) (All versions), SIMATIC S7-200 SMART CPU SR40 (6ES7288-1SR40-0AA0) (All versions), SIMATIC S7-200 SMART CPU SR40 (6ES7288-1SR40-0AA1) (All versions), SIMATIC S7-200 SMART CPU SR60 (6ES7288-1SR60-0AA0) (All versions), SIMATIC S7-200 SMART CPU SR60 (6ES7288-1SR60-0AA1) (All versions), SIMATIC S7-200 SMART CPU ST20 (6ES7288-1ST20-0AA0) (All versions), SIMATIC S7-200 SMART CPU ST20 (6ES7288-1ST20-0AA1) (All versions), SIMATIC S7-200 SMART CPU ST30 (6ES7288-1ST30-0AA0) (All versions), SIMATIC S7-200 SMART CPU ST30 (6ES7288-1ST30-0AA1) (All versions), SIMATIC S7-200 SMART CPU ST40 (6ES7288-1ST40-0AA0) (All versions), SIMATIC S7-200 SMART CPU ST40 (6ES7288-1ST40-0AA1) (All versions), SIMATIC S7-200 SMART CPU ST60 (6ES7288-1ST60-0AA0) (All versions), SIMATIC S7-200 SMART CPU ST60 (6ES7288-1ST60-0AA1) (All versions). Affected devices do not properly handle TCP packets with an incorrect structure. This could allow an unauthenticated remote attacker to cause a denial of service condition. To restore normal operations, the network cable of the device needs to be unplugged and re-plugged.

The advisory is shared for download at cert-portal.siemens.com. This vulnerability was named CVE-2024-43647 since 08/14/2024. The exploitation appears to be easy. 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 current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/11/2024). The MITRE ATT&CK project declares the attack technique as T1499.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔍
CNA CVSS-BT Score: 🔍
CNA Vector: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.5

VulDB Base Score: 7.5
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (siemens): 🔍

CVSSv2info

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

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/14/2024 🔍
09/10/2024 +27 days 🔍
09/10/2024 +0 days 🔍
09/11/2024 +1 days 🔍

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-969738
Status: Confirmed

CVE: CVE-2024-43647 (🔍)
GCVE (CVE): GCVE-0-2024-43647
GCVE (VulDB): GCVE-100-276940

Entryinfo

Created: 09/10/2024 13:48
Updated: 09/11/2024 13:34
Changes: 09/10/2024 13:48 (75), 09/11/2024 13:34 (1)
Complete: 🔍
Cache ID: 216::103

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