VDB-253535 · CVE-2023-51440 · ssa-516818

Siemens SIMATIC CP 343-1 TCP Sequence Number verification of source

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.2	$0-$5k	0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Siemens SIMATIC CP 343-1, SIMATIC CP 343-1 Lean, SIPLUS NET CP 343-1 and SIPLUS NET CP 343-1 Lean. The impacted element is an unknown function of the component TCP Sequence Number Handler. The manipulation leads to verification of source. This vulnerability is referenced as CVE-2023-51440. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Siemens SIMATIC CP 343-1, SIMATIC CP 343-1 Lean, SIPLUS NET CP 343-1 and SIPLUS NET CP 343-1 Lean (SCADA Software) (affected version not known) and classified as problematic. This issue affects some unknown functionality of the component TCP Sequence Number Handler. The manipulation with an unknown input leads to a verification of source vulnerability. Using CWE to declare the problem leads to CWE-940. The product establishes a communication channel to handle an incoming request that has been initiated by an actor, but it does not properly verify that the request is coming from the expected origin. Impacted is availability. The summary by CVE is:

A vulnerability has been identified in SIMATIC CP 343-1 (6GK7343-1EX30-0XE0) (All versions), SIMATIC CP 343-1 Lean (6GK7343-1CX10-0XE0) (All versions), SIPLUS NET CP 343-1 (6AG1343-1EX30-7XE0) (All versions), SIPLUS NET CP 343-1 Lean (6AG1343-1CX10-2XE0) (All versions). Affected products incorrectly validate TCP sequence numbers. This could allow an unauthenticated remote attacker to create a denial of service condition by injecting spoofed TCP RST packets.

The weakness was published 02/13/2024 as ssa-516818. It is possible to read the advisory at cert-portal.siemens.com. The identification of this vulnerability is CVE-2023-51440 since 12/19/2023. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/18/2024).

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

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

SCADA Software

Vendor

Siemens

Name

License

commercial

Website

Vendor: https://www.siemens.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.2

VulDB Base Score: 3.7
VulDB Temp Score: 3.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 7.5
CNA Vector (Siemens AG): 🔍

CVSSv2info

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

Exploitinginfo

Class: Verification of source
CWE: CWE-940
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

12/19/2023 🔍
02/13/2024 +56 days 🔍
02/13/2024 +0 days 🔍
10/18/2024 +248 days 🔍

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-516818
Status: Confirmed

CVE: CVE-2023-51440 (🔍)
GCVE (CVE): GCVE-0-2023-51440
GCVE (VulDB): GCVE-100-253535

Entryinfo

Created: 02/13/2024 14:48
Updated: 10/18/2024 20:18
Changes: 02/13/2024 14:48 (48), 10/18/2024 20:18 (27)
Complete: 🔍
Cache ID: 216::103