Siemens SIMATIC S7-300 CPU/SINUMERIK 840D sl Crafted Packet resource consumption

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Siemens SIMATIC S7-300 CPU and SINUMERIK 840D sl. Impacted is an unknown function. The manipulation as part of Crafted Packet leads to resource consumption. This vulnerability is documented as CVE-2019-18336. The attack can be initiated remotely. There is not any exploit available. It is recommended to apply restrictive firewalling.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Siemens SIMATIC S7-300 CPU and SINUMERIK 840D sl (SCADA Software) (the affected version is unknown). This issue affects an unknown code. The manipulation as part of a Crafted Packet leads to a resource consumption vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability. The summary by CVE is:

A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions < V3.X.17), SIMATIC TDC CP51M1 (All versions < V1.1.8), SIMATIC TDC CPU555 (All versions < V1.1.1), SINUMERIK 840D sl (All versions < V4.8.6), SINUMERIK 840D sl (All versions < V4.94). Specially crafted packets sent to port 102/tcp (Profinet) could cause the affected device to go into defect mode. A restart is required in order to recover the system. Successful exploitation requires an attacker to have network access to port 102/tcp, with no authentication. No user interation is required. At the time of advisory publication no public exploitation of this security vulnerability was known.

The weakness was released 03/10/2020. The identification of this vulnerability is CVE-2019-18336 since 10/23/2019. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Addressing this vulnerability is possible by firewalling tcp/102.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.4

VulDB Base Score: 7.5
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

ADP CISA Base Score: 7.5
ADP CISA Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

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: Firewall
Status: 🔍

0-Day Time: 🔍

Firewalling: 🔍

Timelineinfo

10/23/2019 🔍
03/10/2020 +139 days 🔍
03/11/2020 +1 days 🔍
06/03/2026 +2275 days 🔍

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-508982
Status: Not defined

CVE: CVE-2019-18336 (🔍)
GCVE (CVE): GCVE-0-2019-18336
GCVE (VulDB): GCVE-100-151211

Entryinfo

Created: 03/11/2020 11:46
Updated: 06/03/2026 02:43
Changes: 03/11/2020 11:46 (37), 03/11/2020 11:51 (18), 04/11/2024 09:44 (19), 06/03/2026 02:43 (11)
Complete: 🔍
Cache ID: 216::103

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